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@@ -1,99 +0,0 @@
|
||||
# (C) Copyright David Abrahams 2001. Permission to copy, use, modify, sell and
|
||||
# distribute this software is granted provided this copyright notice appears
|
||||
# in all copies. This software is provided "as is" without express or implied
|
||||
# warranty, and with no claim as to its suitability for any purpose.
|
||||
#
|
||||
# Boost.Python library Jamfile
|
||||
|
||||
|
||||
# declare the location of this subproject relative to the root
|
||||
subproject libs/python/build ;
|
||||
|
||||
# bring in the rules for python
|
||||
import python ;
|
||||
|
||||
if [ check-python-config ]
|
||||
{
|
||||
|
||||
local bpl-linkflags ;
|
||||
|
||||
if $(UNIX) && ( $(OS) = AIX )
|
||||
{
|
||||
bpl-linkflags = <linkflags>"-e initlibboost_python" ;
|
||||
}
|
||||
|
||||
# Enabling intrinsics (/0i) or maximize speed (/02) seem to cause
|
||||
# internal compiler errors with this toolset.
|
||||
local msvc-stlport-workarounds
|
||||
= <optimization>off "<cxxflags>-Ogty -O1 -Gs" ;
|
||||
|
||||
local sources =
|
||||
numeric.cpp
|
||||
list.cpp
|
||||
long.cpp
|
||||
dict.cpp
|
||||
tuple.cpp
|
||||
str.cpp
|
||||
slice.cpp
|
||||
|
||||
aix_init_module.cpp
|
||||
converter/from_python.cpp
|
||||
converter/registry.cpp
|
||||
converter/type_id.cpp
|
||||
object/enum.cpp
|
||||
object/class.cpp
|
||||
object/function.cpp
|
||||
object/inheritance.cpp
|
||||
object/life_support.cpp
|
||||
object/pickle_support.cpp
|
||||
errors.cpp
|
||||
module.cpp
|
||||
converter/builtin_converters.cpp
|
||||
converter/arg_to_python_base.cpp
|
||||
object/iterator.cpp
|
||||
object/stl_iterator.cpp
|
||||
object_protocol.cpp
|
||||
object_operators.cpp
|
||||
wrapper.cpp
|
||||
exec.cpp
|
||||
import.cpp
|
||||
;
|
||||
|
||||
dll boost_python
|
||||
: ../src/$(sources)
|
||||
: $(BOOST_PYTHON_V2_PROPERTIES)
|
||||
<define>BOOST_PYTHON_SOURCE
|
||||
$(bpl-linkflags)
|
||||
<msvc-stlport><release>$(msvc-stlport-workarounds)
|
||||
<darwin><*><linkflags>-bind_at_load
|
||||
<gcc-3_3-darwin><*><linkflags>-bind_at_load
|
||||
;
|
||||
|
||||
template extension
|
||||
: <dll>boost_python
|
||||
: <sysinclude>../../..
|
||||
;
|
||||
|
||||
lib boost_python
|
||||
: # sources
|
||||
../src/$(sources)
|
||||
|
||||
: # requirements
|
||||
$(BOOST_PYTHON_V2_PROPERTIES)
|
||||
<define>BOOST_PYTHON_SOURCE
|
||||
<define>BOOST_STATIC_LIB
|
||||
$(bpl-linkflags)
|
||||
<msvc-stlport><release>$(msvc-stlport-workarounds)
|
||||
;
|
||||
|
||||
stage bin-stage : <dll>boost_python <lib>boost_python
|
||||
: <tag><debug>"_debug"
|
||||
<tag><debug-python>"_pydebug"
|
||||
:
|
||||
debug release
|
||||
;
|
||||
|
||||
install python lib
|
||||
: <dll>boost_python <lib>boost_python
|
||||
;
|
||||
}
|
||||
@@ -1,32 +1,35 @@
|
||||
# Copyright David Abrahams 2001-2006. Distributed under the Boost
|
||||
# Software License, Version 1.0. (See accompanying
|
||||
# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
import os ;
|
||||
import modules ;
|
||||
|
||||
import python ;
|
||||
|
||||
if [ python.configured ] {
|
||||
if ! [ python.configured ] && ! ( --without-python in [ modules.peek : ARGV ] )
|
||||
{
|
||||
# Attempt default configuration of python
|
||||
import toolset : using ;
|
||||
using python ;
|
||||
|
||||
if ! [ python.configured ]
|
||||
{
|
||||
ECHO "WARNING: No python installation configured and autoconfiguration" ;
|
||||
ECHO " failed. See http://www.boost.org/libs/python/doc/building.html" ;
|
||||
ECHO " for configuration instructions or pass --without-python to" ;
|
||||
ECHO " suppress this message and silently skip all Boost.Python targets" ;
|
||||
}
|
||||
}
|
||||
|
||||
if [ python.configured ] {
|
||||
|
||||
project boost/python
|
||||
: source-location ../src
|
||||
: requirements
|
||||
#<include>$(PYTHON_PATH)/include
|
||||
# $(lib_condition)<library-path>$(PYTHON_PATH)/libs
|
||||
# <link>shared:<library>$(PYTHON_LIB)
|
||||
# <define>$(defines)
|
||||
#: usage-requirements # requirement that will be propageted to *users* of this library
|
||||
# <include>$(PYTHON_PATH)/include
|
||||
|
||||
# We have a bug which causes us to conclude that conditionalized
|
||||
# properties in this section are not free.
|
||||
# $(lib_condition)<library-path>$(PYTHON_PATH)/lib/python2.2/config
|
||||
# <shared>true:<find-library>$(PYTHON_LIB)
|
||||
|
||||
# <library-path>$(PYTHON_PATH)/lib/python2.2/config
|
||||
# <library>$(PYTHON_LIB)
|
||||
;
|
||||
|
||||
lib boost_python
|
||||
:
|
||||
: # sources
|
||||
numeric.cpp
|
||||
list.cpp
|
||||
long.cpp
|
||||
@@ -35,7 +38,6 @@ lib boost_python
|
||||
str.cpp
|
||||
slice.cpp
|
||||
|
||||
aix_init_module.cpp
|
||||
converter/from_python.cpp
|
||||
converter/registry.cpp
|
||||
converter/type_id.cpp
|
||||
@@ -56,10 +58,31 @@ lib boost_python
|
||||
wrapper.cpp
|
||||
import.cpp
|
||||
exec.cpp
|
||||
: <link>static:<define>BOOST_PYTHON_STATIC_LIB
|
||||
: # requirements
|
||||
<link>static:<define>BOOST_PYTHON_STATIC_LIB
|
||||
<define>BOOST_PYTHON_SOURCE
|
||||
<library>/python//python
|
||||
: <link>shared
|
||||
|
||||
# On Windows, all code using Python has to link to the Python
|
||||
# import library.
|
||||
#
|
||||
# On *nix we never link libboost_python to libpython. When
|
||||
# extending Python, all Python symbols are provided by the
|
||||
# Python interpreter executable. When embedding Python, the
|
||||
# client executable is expected to explicitly link to
|
||||
# /python//python (the target representing libpython) itself.
|
||||
#
|
||||
# python_for_extensions is a target defined by Boost.Build to
|
||||
# provide the Python include paths, and on Windows, the Python
|
||||
# import library, as usage requirements.
|
||||
<library>/python//python_for_extensions
|
||||
|
||||
<python-debugging>on:<define>BOOST_DEBUG_PYTHON
|
||||
|
||||
: # default build
|
||||
<link>shared
|
||||
: # usage requirements
|
||||
<link>static:<define>BOOST_PYTHON_STATIC_LIB
|
||||
<python-debugging>on:<define>BOOST_DEBUG_PYTHON
|
||||
;
|
||||
}
|
||||
else
|
||||
|
||||
@@ -95,10 +95,6 @@ LINK32=link.exe
|
||||
# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"
|
||||
# Begin Source File
|
||||
|
||||
SOURCE=..\..\src\aix_init_module.cpp
|
||||
# End Source File
|
||||
# Begin Source File
|
||||
|
||||
SOURCE=..\..\src\converter\arg_to_python_base.cpp
|
||||
# End Source File
|
||||
# Begin Source File
|
||||
@@ -214,10 +210,6 @@ SOURCE=..\..\src\exec.cpp
|
||||
# PROP Default_Filter ""
|
||||
# Begin Source File
|
||||
|
||||
SOURCE=..\..\..\..\boost\python\detail\aix_init_module.hpp
|
||||
# End Source File
|
||||
# Begin Source File
|
||||
|
||||
SOURCE=..\..\..\..\boost\python\detail\api_placeholder.hpp
|
||||
# End Source File
|
||||
# Begin Source File
|
||||
|
||||
23
doc/Jamfile
Normal file
23
doc/Jamfile
Normal file
@@ -0,0 +1,23 @@
|
||||
# Copyright David Abrahams 2006. Distributed under the Boost
|
||||
# Software License, Version 1.0. (See accompanying
|
||||
# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
import docutils ;
|
||||
|
||||
import path ;
|
||||
sources = building.rst ;
|
||||
bases = $(sources:S=) ;
|
||||
|
||||
# This is a path relative to the html/ subdirectory where the
|
||||
# generated output will eventually be moved.
|
||||
stylesheet = "--stylesheet=../../../rst.css" ;
|
||||
|
||||
for local b in $(bases)
|
||||
{
|
||||
html $(b) : $(b).rst :
|
||||
|
||||
<docutils-html>"-gdt --source-url="./$(b).rst" --link-stylesheet --traceback --trim-footnote-reference-space --footnote-references=superscript "$(stylesheet)
|
||||
;
|
||||
}
|
||||
|
||||
alias htmls : $(bases) ;
|
||||
stage . : $(bases) ;
|
||||
@@ -1,5 +1,11 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1 +1,5 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
This file has been moved to http://www.boost-consulting.com/writing/bpl.txt.
|
||||
|
||||
@@ -1,3 +1,7 @@
|
||||
Copyright David Abrahams 2006. Distributed under the Boost
|
||||
Software License, Version 1.0. (See accompanying
|
||||
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
.. This is a comment. Note how any initial comments are moved by
|
||||
transforms to after the document title, subtitle, and docinfo.
|
||||
|
||||
|
||||
@@ -5,6 +5,8 @@
|
||||
:version: $Revision$
|
||||
:copyright: This stylesheet has been placed in the public domain.
|
||||
|
||||
boostinspect:nolicense
|
||||
|
||||
Default cascading style sheet for the HTML output of Docutils.
|
||||
*/
|
||||
|
||||
|
||||
@@ -1,3 +1,7 @@
|
||||
/* Copyright David Abrahams 2006. Distributed under the Boost
|
||||
Software License, Version 1.0. (See accompanying
|
||||
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
*/
|
||||
H1
|
||||
{
|
||||
FONT-SIZE: 200%
|
||||
|
||||
1076
doc/building.html
1076
doc/building.html
File diff suppressed because it is too large
Load Diff
681
doc/building.rst
Normal file
681
doc/building.rst
Normal file
@@ -0,0 +1,681 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at
|
||||
.. http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
==============================================
|
||||
|(logo)|__ Boost.Python Build and Test HOWTO
|
||||
==============================================
|
||||
|
||||
.. |(logo)| image:: ../../../boost.png
|
||||
:alt: Boost C++ Libraries:
|
||||
:class: boost-logo
|
||||
|
||||
__ ../index.htm
|
||||
|
||||
|
||||
.. section-numbering::
|
||||
:depth: 2
|
||||
|
||||
.. contents:: Contents
|
||||
:depth: 2
|
||||
:class: sidebar small
|
||||
|
||||
.. |newer| replace:: *newer*
|
||||
|
||||
Requirements
|
||||
============
|
||||
|
||||
Boost.Python requires `Python 2.2`_ [#2.2]_ *or* |newer|__.
|
||||
|
||||
.. _Python 2.2: http://www.python.org/2.2
|
||||
__ http://www.python.org
|
||||
|
||||
Background
|
||||
==========
|
||||
|
||||
There are two basic models for combining C++ and Python:
|
||||
|
||||
- extending_, in which the end-user launches the Python interpreter
|
||||
executable and imports Python “extension modules” written in C++.
|
||||
Think of taking a library written in C++ and giving it a Python
|
||||
interface so Python programmers can use it. From Python, these
|
||||
modules look just like regular Python modules.
|
||||
|
||||
- embedding_, in which the end-user launches a program written
|
||||
in C++ that in turn invokes the Python interpreter as a library
|
||||
subroutine. Think of adding scriptability to an existing
|
||||
application.
|
||||
|
||||
.. _extending: http://www.python.org/doc/current/ext/intro.html
|
||||
.. _embedding: http://www.python.org/doc/current/ext/embedding.html
|
||||
|
||||
The key distinction between extending and embedding is the location
|
||||
of the C++ ``main()`` function: in the Python interpreter executable,
|
||||
or in some other program, respectively. Note that even when
|
||||
embedding Python in another program, `extension modules are often
|
||||
the best way to make C/C++ functionality accessible to Python
|
||||
code`__, so the use of extension modules is really at the heart of
|
||||
both models.
|
||||
|
||||
__ http://www.python.org/doc/current/ext/extending-with-embedding.html
|
||||
|
||||
Except in rare cases, extension modules are built as
|
||||
dynamically-loaded libraries with a single entry point, which means
|
||||
you can change them without rebuilding either the other extension
|
||||
modules or the executable containing ``main()``.
|
||||
|
||||
.. _quickstart:
|
||||
|
||||
No-Install Quickstart
|
||||
=====================
|
||||
|
||||
There is no need to “install Boost” in order to get started using
|
||||
Boost.Python. These instructions use Boost.Build_ projects,
|
||||
which will build those binaries as soon as they're needed. Your
|
||||
first tests may take a little longer while you wait for
|
||||
Boost.Python to build, but doing things this way will save you from
|
||||
worrying about build intricacies like which library binaries to use
|
||||
for a specific compiler configuration and figuring out the right
|
||||
compiler options to use yourself.
|
||||
|
||||
.. .. raw:: html
|
||||
|
||||
<div style="width:50%">
|
||||
|
||||
.. Note:: Of course it's possible to use other build systems to
|
||||
build Boost.Python and its extensions, but they are not
|
||||
officially supported by Boost. Moreover **99% of all “I can't
|
||||
build Boost.Python” problems come from trying to use another
|
||||
build system** without first following these instructions.
|
||||
|
||||
If you want to use another system anyway, we suggest that you
|
||||
follow these instructions, and then invoke ``bjam`` with the
|
||||
|
||||
.. parsed-literal::
|
||||
|
||||
``-a -o``\ *filename*
|
||||
|
||||
options to dump the build commands it executes to a file, so
|
||||
you can see what your alternate build system needs to do.
|
||||
|
||||
.. .. raw:: html
|
||||
|
||||
</div>
|
||||
|
||||
.. _Boost.Build: ../../../tools/build/index.html
|
||||
|
||||
Basic Procedure
|
||||
---------------
|
||||
|
||||
1. Get Boost; see sections 1 and 2 [`Unix/Linux`__, `Windows`__\ ] of the
|
||||
Boost `Getting Started Guide`_.
|
||||
|
||||
__ ../../../more/getting_started/unix-variants.html#get-boost
|
||||
__ ../../../more/getting_started/windows.html#get-boost
|
||||
|
||||
2. Get the ``bjam`` build driver. See section 5 [`Unix/Linux`__,
|
||||
`Windows`__\ ] of the Boost `Getting Started Guide`_.
|
||||
|
||||
__ ../../../more/getting_started/unix-variants.html#prepare-to-use-a-boost-library-binary
|
||||
__ ../../../more/getting_started/windows.html#prepare-to-use-a-boost-library-binary
|
||||
|
||||
|
||||
3. cd into the ``libs/python/example/quickstart/`` directory of your
|
||||
Boost installation, which contains a small example project.
|
||||
|
||||
4. Invoke ``bjam``. Replace the “\ ``stage``\ “ argument from the
|
||||
example invocation from section 5 of the `Getting Started
|
||||
Guide`_ with “\ ``test``\ ,“ to build all the test targets. Also add
|
||||
the argument “\ ``--verbose-test``\ ” to see the output generated by
|
||||
the tests when they are run.
|
||||
|
||||
On Windows, your ``bjam`` invocation might look something like:
|
||||
|
||||
.. parsed-literal::
|
||||
|
||||
C:\\boost_1_34_0\\…\\quickstart> **bjam toolset=msvc --verbose-test test**
|
||||
|
||||
and on Unix variants, perhaps,
|
||||
|
||||
.. parsed-literal::
|
||||
|
||||
~/boost_1_34_0/…/quickstart$ **bjam toolset=gcc --verbose-test test**
|
||||
|
||||
.. Admonition:: Note to Windows Users
|
||||
|
||||
For the sake of concision, the rest of this guide will use
|
||||
unix-style forward slashes in pathnames instead of the
|
||||
backslashes with which you may be more familiar. The forward
|
||||
slashes should work everywhere except in `Command Prompt`_
|
||||
windows, where you should use backslashes.
|
||||
|
||||
.. _Command Prompt: ../../../more/getting_started/windows.html#command-prompt
|
||||
|
||||
If you followed this procedure successfully, you will have built an
|
||||
extension module called ``extending`` and tested it by running a
|
||||
Python script called ``test_extending.py``. You will also have
|
||||
built and run a simple application called ``embedding`` that embeds
|
||||
python.
|
||||
|
||||
.. _Getting Started Guide: ../../../more/getting_started/index.html
|
||||
|
||||
In Case of Trouble
|
||||
------------------
|
||||
|
||||
If you're seeing lots of compiler and/or linker error messages,
|
||||
it's probably because Boost.Build is having trouble finding your
|
||||
Python installation. You might want to pass the
|
||||
``--debug-configuration`` option to ``bjam`` the first few times
|
||||
you invoke it, to make sure that Boost.Build is correctly locating
|
||||
all the parts of your Python installation. If it isn't, consider
|
||||
`Configuring Boost.Build`_ as detailed below.
|
||||
|
||||
If you're still having trouble, Someone on one of the following
|
||||
mailing lists may be able to help:
|
||||
|
||||
* The `Boost.Build mailing list`__ for issues related to Boost.Build
|
||||
* The Python `C++ Sig`__ for issues specifically related to Boost.Python
|
||||
|
||||
__ ../../../more/mailing_lists.htm#jamboost
|
||||
__ ../../../more/mailing_lists.htm#cplussig
|
||||
|
||||
In Case Everything Seemed to Work
|
||||
---------------------------------
|
||||
|
||||
Rejoice! If you're new to Boost.Python, at this point it might be
|
||||
a good idea to ignore build issues for a while and concentrate on
|
||||
learning the library by going through the tutorial_ and perhaps
|
||||
some of the `reference documentation`_, trying out what you've
|
||||
learned about the API by modifying the quickstart project.
|
||||
|
||||
.. _reference documentation: v2/reference.html
|
||||
.. _tutorial: tutorial/index.html
|
||||
|
||||
Modifying the Example Project
|
||||
-----------------------------
|
||||
|
||||
If you're content to keep your extension module forever in one
|
||||
source file called |extending.cpp|_, inside your Boost
|
||||
distribution, and import it forever as ``extending``, then you can
|
||||
stop here. However, it's likely that you will want to make a few
|
||||
changes. There are a few things you can do without having to learn
|
||||
Boost.Build_ in depth.
|
||||
|
||||
The project you just built is specified in two files in the current
|
||||
directory: |boost-build.jam|_, which tells ``bjam`` where it can
|
||||
find the interpreted code of the Boost build system, and
|
||||
|Jamroot|_, which describes the targets you just built. These
|
||||
files are heavily commented, so they should be easy to modify.
|
||||
Take care, however, to preserve whitespace. Punctuation such as
|
||||
``;`` will not be recognized as intended by ``bjam`` if it is not
|
||||
surrounded by whitespace.
|
||||
|
||||
.. |boost-build.jam| replace:: ``boost-build.jam``
|
||||
.. _boost-build.jam: ../example/quickstart/boost-build.jam
|
||||
|
||||
.. |Jamroot| replace:: ``Jamroot``
|
||||
.. _Jamroot: ../example/quickstart/Jamroot
|
||||
|
||||
.. |extending.cpp| replace:: ``extending.cpp``
|
||||
.. _extending.cpp: ../example/quickstart/extending.cpp
|
||||
|
||||
Relocate the Project
|
||||
....................
|
||||
|
||||
You'll probably want to copy this project elsewhere so you can
|
||||
change it without modifying your Boost distribution. To do that,
|
||||
simply
|
||||
|
||||
a. copy the entire ``libs/python/example/quickstart/`` directory
|
||||
into a new directory.
|
||||
|
||||
b. In the new copies of |boost-build.jam|_ and |Jamroot|_, locate
|
||||
the relative path near the top of the file that is clearly
|
||||
marked by a comment, and edit that path so that it refers to the
|
||||
same directory your Boost distribution as it referred to when
|
||||
the file was in its original location in the
|
||||
``libs/python/example/quickstart/`` directory.
|
||||
|
||||
For example, if you moved the project from
|
||||
``/home/dave/boost_1_34_0/libs/python/example/quickstart`` to
|
||||
``/home/dave/my-project``, you could change the first path in
|
||||
|boost-build.jam|_ from
|
||||
|
||||
.. parsed-literal::
|
||||
|
||||
**../../../..**\ /tools/build/v2
|
||||
|
||||
to
|
||||
|
||||
.. parsed-literal::
|
||||
|
||||
**/home/dave/boost_1_34_0**\ /tools/build/v2
|
||||
|
||||
and change the first path in |Jamroot|_ from
|
||||
|
||||
.. parsed-literal::
|
||||
|
||||
**../../../..**
|
||||
|
||||
to
|
||||
|
||||
.. parsed-literal::
|
||||
|
||||
**/home/dave/boost_1_34_0**
|
||||
|
||||
Add New or Change Names of Existing Source Files
|
||||
................................................
|
||||
|
||||
The names of additional source files involved in building your
|
||||
extension module or embedding application can be listed in
|
||||
|Jamroot|_ right alongside ``extending.cpp`` or ``embedding.cpp``
|
||||
respectively. Just be sure to leave whitespace around each
|
||||
filename::
|
||||
|
||||
… file1.cpp file2.cpp file3.cpp …
|
||||
|
||||
Naturally, if you want to change the name of a source file you can
|
||||
tell Boost.Build about it by editing the name in |Jamroot|_.
|
||||
|
||||
Change the Name of your Extension Module
|
||||
........................................
|
||||
|
||||
The name of the extension module is determined by two things:
|
||||
|
||||
1. the name in |Jamroot|_ immediately following ``python-extension``, and
|
||||
2. the name passed to ``BOOST_PYTHON_MODULE`` in |extending.cpp|_.
|
||||
|
||||
To change the name of the extension module from ``extending`` to
|
||||
``hello``, you'd edit |Jamroot|_, changing
|
||||
|
||||
.. parsed-literal::
|
||||
|
||||
python-extension **extending** : extending.cpp ;
|
||||
|
||||
to
|
||||
|
||||
.. parsed-literal::
|
||||
|
||||
python-extension **hello** : extending.cpp ;
|
||||
|
||||
and you'd edit extending.cpp, changing
|
||||
|
||||
.. parsed-literal::
|
||||
|
||||
BOOST_PYTHON_MODULE(\ **extending**\ )
|
||||
|
||||
to
|
||||
|
||||
.. parsed-literal::
|
||||
|
||||
BOOST_PYTHON_MODULE(\ **hello**\ )
|
||||
|
||||
Installing Boost.Python on your System
|
||||
======================================
|
||||
|
||||
Since Boost.Python is a separately-compiled (as opposed to
|
||||
`header-only`_) library, its user relies on the services of a
|
||||
Boost.Python library binary.
|
||||
|
||||
.. _header-only: ../../../more/getting_started/windows.html#header-only-libraries
|
||||
|
||||
If you need a regular installation of the Boost.Python library
|
||||
binaries on your system, the Boost `Getting Started Guide`_ will
|
||||
walk you through the steps of creating one. If building binaries
|
||||
from source, you might want to supply the ``--with-python``
|
||||
argument to ``bjam`` (or the ``--with-libraries=python`` argument
|
||||
to ``configure``), so only the Boost.Python binary will be built,
|
||||
rather than all the Boost binaries.
|
||||
|
||||
|
||||
Configuring Boost.Build
|
||||
=======================
|
||||
|
||||
As described in the `Boost.Build reference manual`__, a file called
|
||||
``user-config.jam`` in your home directory [#home-dir]_ is used to
|
||||
specify the tools and libraries available to the build system. You
|
||||
may need to create or edit ``user-config.jam`` to tell Boost.Build
|
||||
how to invoke Python, ``#include`` its headers, and link with its
|
||||
libraries.
|
||||
|
||||
__ http://www.boost.orgdoc/html/bbv2/advanced.html#bbv2.advanced.configuration
|
||||
|
||||
.. Admonition:: Users of Unix-Variant OSes
|
||||
|
||||
If you are using a unix-variant OS and you ran Boost's
|
||||
``configure`` script, it may have generated a
|
||||
``user-config.jam`` for you. [#overwrite]_ If your ``configure``\
|
||||
/\ ``make`` sequence was successful and Boost.Python binaries
|
||||
were built, your ``user-config.jam`` file is probably already
|
||||
correct.
|
||||
|
||||
If you have one fairly “standard” python installation for your
|
||||
platform, you might not need to do anything special to describe it. If
|
||||
you haven't configured python in ``user-config.jam`` (and you don't
|
||||
specify ``--without-python`` on the Boost.Build command line),
|
||||
Boost.Build will automatically execute the equivalent of ::
|
||||
|
||||
import toolset : using ;
|
||||
using python ;
|
||||
|
||||
which automatically looks for Python in the most likely places.
|
||||
However, that only happens when using the Boost.Python project file
|
||||
(e.g. when referred to by another project as in the quickstart_
|
||||
method). If instead you are linking against separately-compiled
|
||||
Boost.Python binaries, you should set up a ``user-config.jam`` file
|
||||
with at least the minimal incantation above.
|
||||
|
||||
Python Configuration Parameters
|
||||
-------------------------------
|
||||
|
||||
If you have several versions of Python installed, or Python is
|
||||
installed in an unusual way, you may want to supply any or all of
|
||||
the following optional parameters to ``using python``.
|
||||
|
||||
version
|
||||
the version of Python to use. Should be in Major.Minor
|
||||
format, for example, ``2.3``. Do not include the subminor
|
||||
version (i.e. *not* ``2.5.1``). If you have multiple Python
|
||||
versions installed, the version will usually be the only
|
||||
configuration argument required.
|
||||
|
||||
cmd-or-prefix
|
||||
preferably, a command that invokes a Python interpreter.
|
||||
Alternatively, the installation prefix for Python libraries and
|
||||
header files. Only use the alternative formulation if there is
|
||||
no appropriate Python executable available.
|
||||
|
||||
includes
|
||||
the ``#include`` paths for Python headers. Normally the correct
|
||||
path(s) will be automatically deduced from ``version`` and/or
|
||||
``cmd-or-prefix``.
|
||||
|
||||
libraries
|
||||
the path to Python library binaries. On MacOS/Darwin,
|
||||
you can also pass the path of the Python framework. Normally the
|
||||
correct path(s) will be automatically deduced from ``version``
|
||||
and/or ``cmd-or-prefix``.
|
||||
|
||||
condition
|
||||
if specified, should be a set of Boost.Build
|
||||
properties that are matched against the build configuration when
|
||||
Boost.Build selects a Python configuration to use. See examples
|
||||
below for details.
|
||||
|
||||
extension-suffix
|
||||
A string to append to the name of extension
|
||||
modules before the true filename extension. You almost certainly
|
||||
don't need to use this. Usually this suffix is only used when
|
||||
targeting a Windows debug build of Python, and will be set
|
||||
automatically for you based on the value of the
|
||||
|python-debugging|_ feature. However, at least one Linux
|
||||
distribution (Ubuntu Feisty Fawn) has a specially configured
|
||||
`python-dbg`__ package that claims to use such a suffix.
|
||||
|
||||
.. |python-debugging| replace:: ``<python-debugging>``
|
||||
|
||||
__ https://wiki.ubuntu.com/PyDbgBuilds
|
||||
|
||||
|
||||
Examples
|
||||
--------
|
||||
|
||||
Note that in the examples below, case and *especially whitespace* are
|
||||
significant.
|
||||
|
||||
- If you have both python 2.5 and python 2.4 installed,
|
||||
``user-config.jam`` might contain::
|
||||
|
||||
using python : 2.5 ; # Make both versions of Python available
|
||||
|
||||
using python : 2.4 ; # To build with python 2.4, add python=2.4
|
||||
# to your command line.
|
||||
|
||||
The first version configured (2.5) becomes the default. To build
|
||||
against python 2.4, add ``python=2.4`` to the ``bjam`` command line.
|
||||
|
||||
- If you have python installed in an unusual location, you might
|
||||
supply the path to the interpreter in the ``cmd-or-prefix``
|
||||
parameter::
|
||||
|
||||
using python : : /usr/local/python-2.6-beta/bin/python ;
|
||||
|
||||
- If you have a separate build of Python for use with a particular
|
||||
toolset, you might supply that toolset in the ``condition``
|
||||
parameter::
|
||||
|
||||
using python ; # use for most toolsets
|
||||
|
||||
# Use with Intel C++ toolset
|
||||
using python
|
||||
: # version
|
||||
: c:\\Devel\\Python-2.5-IntelBuild\\PCBuild\\python # cmd-or-prefix
|
||||
: # includes
|
||||
: # libraries
|
||||
: <toolset>intel # condition
|
||||
;
|
||||
|
||||
|
||||
- If you have downloaded the Python sources and built both the
|
||||
normal and the “\ `python debugging`_\ ” builds from source on
|
||||
Windows, you might see::
|
||||
|
||||
using python : 2.5 : C:\\src\\Python-2.5\\PCBuild\\python ;
|
||||
using python : 2.5 : C:\\src\\Python-2.5\\PCBuild\\python_d
|
||||
: # includes
|
||||
: # libs
|
||||
: <python-debugging>on ;
|
||||
|
||||
- You can set up your user-config.jam so a bjam built under Windows
|
||||
can build/test both Windows and Cygwin_ python extensions. Just pass
|
||||
``<target-os>cygwin`` in the ``condition`` parameter
|
||||
for the cygwin python installation::
|
||||
|
||||
# windows installation
|
||||
using python ;
|
||||
|
||||
# cygwin installation
|
||||
using python : : c:\\cygwin\\bin\\python2.5 : : : <target-os>cygwin ;
|
||||
|
||||
when you put target-os=cygwin in your build request, it should build
|
||||
with the cygwin version of python: [#flavor]_
|
||||
|
||||
bjam target-os=cygwin toolset=gcc
|
||||
|
||||
This is supposed to work the other way, too (targeting windows
|
||||
python with a Cygwin_ bjam) but it seems as though the support in
|
||||
Boost.Build's toolsets for building that way is broken at the
|
||||
time of this writing.
|
||||
|
||||
- Note that because of `the way Boost.Build currently selects target
|
||||
alternatives`__, you might have be very explicit in your build
|
||||
requests. For example, given::
|
||||
|
||||
using python : 2.5 ; # a regular windows build
|
||||
using python : 2.4 : : : : <target-os>cygwin ;
|
||||
|
||||
building with ::
|
||||
|
||||
bjam target-os=cygwin
|
||||
|
||||
will yield an error. Instead, you'll need to write::
|
||||
|
||||
bjam target-os=cygwin/python=2.4
|
||||
|
||||
.. _Cygwin: http://cygwin.com
|
||||
|
||||
__ http://zigzag.cs.msu.su/boost.build/wiki/AlternativeSelection
|
||||
|
||||
Choosing a Boost.Python Library Binary
|
||||
======================================
|
||||
|
||||
If—instead of letting Boost.Build construct and link with the right
|
||||
libraries automatically—you choose to use a pre-built Boost.Python
|
||||
library, you'll need to think about which one to link with. The
|
||||
Boost.Python binary comes in both static and dynamic flavors. Take
|
||||
care to choose the right flavor for your application. [#naming]_
|
||||
|
||||
The Dynamic Binary
|
||||
------------------
|
||||
|
||||
The dynamic library is the safest and most-versatile choice:
|
||||
|
||||
- A single copy of the library code is used by all extension
|
||||
modules built with a given toolset. [#toolset-specific]_
|
||||
|
||||
- The library contains a type conversion registry. Because one
|
||||
registry is shared among all extension modules, instances of a
|
||||
class exposed to Python in one dynamically-loaded extension
|
||||
module can be passed to functions exposed in another such module.
|
||||
|
||||
The Static Binary
|
||||
-----------------
|
||||
|
||||
It might be appropriate to use the static Boost.Python library in
|
||||
any of the following cases:
|
||||
|
||||
- You are extending_ python and the types exposed in your
|
||||
dynamically-loaded extension module don't need to be used by any
|
||||
other Boost.Python extension modules, and you don't care if the
|
||||
core library code is duplicated among them.
|
||||
|
||||
- You are embedding_ python in your application and either:
|
||||
|
||||
- You are targeting a Unix variant OS other than MacOS or AIX,
|
||||
where the dynamically-loaded extension modules can “see” the
|
||||
Boost.Python library symbols that are part of the executable.
|
||||
|
||||
- Or, you have statically linked some Boost.Python extension
|
||||
modules into your application and you don't care if any
|
||||
dynamically-loaded Boost.Python extension modules are able to
|
||||
use the types exposed by your statically-linked extension
|
||||
modules (and vice-versa).
|
||||
|
||||
``#include`` Issues
|
||||
===================
|
||||
|
||||
1. If you should ever have occasion to ``#include "python.h"``
|
||||
directly in a translation unit of a program using Boost.Python,
|
||||
use ``#include "boost/python/detail/wrap_python.hpp"`` instead.
|
||||
It handles several issues necessary for use with Boost.Python,
|
||||
one of which is mentioned in the next section.
|
||||
|
||||
2. Be sure not to ``#include`` any system headers before
|
||||
``wrap_python.hpp``. This restriction is actually imposed by
|
||||
Python, or more properly, by Python's interaction with your
|
||||
operating system. See
|
||||
http://docs.python.org/ext/simpleExample.html for details.
|
||||
|
||||
.. _python-debugging:
|
||||
.. _python debugging:
|
||||
|
||||
Python Debugging Builds
|
||||
=======================
|
||||
|
||||
Python can be built in a special “python debugging” configuration
|
||||
that adds extra checks and instrumentation that can be very useful
|
||||
for developers of extension modules. The data structures used by
|
||||
the debugging configuration contain additional members, so **a
|
||||
Python executable built with python debugging enabled cannot be
|
||||
used with an extension module or library compiled without it, and
|
||||
vice-versa.**
|
||||
|
||||
Since pre-built “python debugging” versions of the Python
|
||||
executable and libraries are not supplied with most distributions
|
||||
of Python, [#get-debug-build]_ and we didn't want to force our users
|
||||
to build them, Boost.Build does not automatically enable python
|
||||
debugging in its ``debug`` build variant (which is the default).
|
||||
Instead there is a special build property called
|
||||
``python-debugging`` that, when used as a build property, will
|
||||
define the right preprocessor symbols and select the right
|
||||
libraries to link with.
|
||||
|
||||
On unix-variant platforms, the debugging versions of Python's data
|
||||
structures will only be used if the symbol ``Py_DEBUG`` is defined.
|
||||
On many windows compilers, when extension modules are built with
|
||||
the preprocessor symbol ``_DEBUG``, Python defaults to force
|
||||
linking with a special debugging version of the Python DLL. Since
|
||||
that symbol is very commonly used even when Python is not present,
|
||||
Boost.Python temporarily undefines _DEBUG when Python.h
|
||||
is #included from ``boost/python/detail/wrap_python.hpp`` - unless
|
||||
``BOOST_DEBUG_PYTHON`` is defined. The upshot is that if you want
|
||||
“python debugging”and you aren't using Boost.Build, you should make
|
||||
sure ``BOOST_DEBUG_PYTHON`` is defined, or python debugging will be
|
||||
suppressed.
|
||||
|
||||
Testing Boost.Python
|
||||
====================
|
||||
|
||||
To run the full test suite for Boost.Python, invoke ``bjam`` in the
|
||||
``libs/python/test`` subdirectory of your Boost distribution.
|
||||
|
||||
Notes for MinGW (and Cygwin with -mno-cygwin) GCC Users
|
||||
=======================================================
|
||||
|
||||
If you are using a version of Python prior to 2.4.1 with a MinGW
|
||||
prior to 3.0.0 (with binutils-2.13.90-20030111-1), you will need to
|
||||
create a MinGW-compatible version of the Python library; the one
|
||||
shipped with Python will only work with a Microsoft-compatible
|
||||
linker. Follow the instructions in the “Non-Microsoft” section of
|
||||
the “Building Extensions: Tips And Tricks” chapter in `Installing
|
||||
Python Modules`__ to create ``libpythonXX.a``, where ``XX``
|
||||
corresponds to the major and minor version numbers of your Python
|
||||
installation.
|
||||
|
||||
__ http://www.python.org/doc/current/inst/index.html
|
||||
|
||||
-----------------------------
|
||||
|
||||
.. [#2.2] Note that although we tested earlier versions of
|
||||
Boost.Python with Python 2.2, and we don't *think* we've done
|
||||
anything to break compatibility, this release of Boost.Python
|
||||
may not have been tested with versions of Python earlier than
|
||||
2.4, so we're not 100% sure that python 2.2 and 2.3 are
|
||||
supported.
|
||||
|
||||
.. [#naming] Information about how to identify the
|
||||
static and dynamic builds of Boost.Python:
|
||||
|
||||
* `on Windows`__
|
||||
* `on Unix variants`__
|
||||
|
||||
__ ../../../more/getting_started/windows.html#library-naming
|
||||
__ ../../../more/getting_started/unix-variants.html#library-naming
|
||||
|
||||
.. [#toolset-specific] Because of the way most \*nix platforms
|
||||
share symbols among dynamically-loaded objects, I'm not certain
|
||||
that extension modules built with different compiler toolsets
|
||||
will always use different copies of the Boost.Python library
|
||||
when loaded into the same Python instance. Not using different
|
||||
libraries could be a good thing if the compilers have compatible
|
||||
ABIs, because extension modules built with the two libraries
|
||||
would be interoperable. Otherwise, it could spell disaster,
|
||||
since an extension module and the Boost.Python library would
|
||||
have different ideas of such things as class layout. I would
|
||||
appreciate someone doing the experiment to find out what
|
||||
happens.
|
||||
|
||||
.. [#overwrite] ``configure`` overwrites the existing
|
||||
``user-config.jam`` in your home directory
|
||||
(if any) after making a backup of the old version.
|
||||
|
||||
.. [#flavor] Note that the ``<target-os>cygwin`` feature is
|
||||
different from the ``<flavor>cygwin`` subfeature of the ``gcc``
|
||||
toolset, and you might need handle both explicitly if you also
|
||||
have a MinGW GCC installed.
|
||||
|
||||
.. [#home-dir] Windows users, your home directory can be
|
||||
found by typing::
|
||||
|
||||
ECHO %HOMEDRIVE%%HOMEPATH%
|
||||
|
||||
into a `command prompt`_ window.
|
||||
|
||||
.. [#get-debug-build] On Unix and similar platforms, a debugging
|
||||
python and associated libraries are built by adding
|
||||
``--with-pydebug`` when configuring the Python build. On
|
||||
Windows, the debugging version of Python is generated by
|
||||
the "Win32 Debug" target of the Visual Studio project in the
|
||||
PCBuild subdirectory of a full Python source code distribution.
|
||||
You may also find
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
@@ -144,7 +147,9 @@
|
||||
|
||||
<dt><a href="v2/faq.html">Frequently Asked Questions (FAQs)</a></dt>
|
||||
|
||||
<dt><a href="../pyste/index.html">Pyste (Boost.Python code generator)</a></dt>
|
||||
<dt><a href="http://www.language-binding.net/pyplusplus/pyplusplus.html">Py++ Boost.Python code generator</a></dt>
|
||||
|
||||
<dt><a href="../pyste/index.html">Pyste Boost.Python code generator (no longer maintained)</a></dt>
|
||||
|
||||
<dt><a href="internals.html">Internals Documentation</a></dt>
|
||||
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
@@ -39,6 +42,12 @@
|
||||
<li>New <a href="v2/docstring_options.html"
|
||||
><code>docstring_options.hpp</code></a> header to
|
||||
control the content of docstrings.
|
||||
|
||||
<li>Support for converting <code>void*</code> to/from python,
|
||||
with <code><a
|
||||
href="v2/opaque.html">opaque_pointer_converter</a></code>
|
||||
as the return value policy. Thanks to Niall Douglas for the
|
||||
initial patch.
|
||||
</ul>
|
||||
</dd>
|
||||
|
||||
@@ -210,7 +219,7 @@ BOOST_PYTHON_MODULE(test)
|
||||
|
||||
<dd><a href="mailto:Gottfried.Ganssauge-at-haufe.de">Gottfried
|
||||
Ganßauge</a> has contributed <a href=
|
||||
"v2/opaque_pointer_converter.html">opaque pointer support</a>.<br>
|
||||
"v2/opaque.html">opaque pointer support</a>.<br>
|
||||
<a href="mailto:nicodemus-at-globalite.com.br">Bruno da Silva de
|
||||
Oliveira</a> has contributed the exciting <a href=
|
||||
"../pyste/index.html">Pyste</a> ("Pie-steh") package.</dd>
|
||||
|
||||
@@ -1,3 +1,8 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at
|
||||
.. http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
How Runtime Polymorphism is expressed in Boost.Python:
|
||||
-----------------------------------------------------
|
||||
|
||||
|
||||
@@ -1,436 +1,445 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
"HTML Tidy for Cygwin (vers 1st April 2002), see www.w3.org">
|
||||
<meta http-equiv="Content-Type" content="text/html; charset="utf-8">
|
||||
<link rel="stylesheet" type="text/css" href="boost.css">
|
||||
|
||||
<title>Boost.Python - Projects using Boost.Python</title>
|
||||
</head>
|
||||
|
||||
<body link="#0000ff" vlink="#800080">
|
||||
<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
|
||||
"header">
|
||||
<tr>
|
||||
<td valign="top" width="300">
|
||||
<h3><a href="../../../index.htm"><img height="86" width="277" alt=
|
||||
"C++ Boost" src="../../../boost.png" border="0"></a></h3>
|
||||
</td>
|
||||
|
||||
<td valign="top">
|
||||
<h1 align="center"><a href="index.html">Boost.Python</a></h1>
|
||||
|
||||
<h2 align="center">Projects using Boost.Python</h2>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<hr>
|
||||
|
||||
<h2>Introduction</h2>
|
||||
|
||||
<p>This is a partial list of projects using Boost.Python. If you are
|
||||
using Boost.Python as your Python/C++ binding solution, we'd be proud to
|
||||
list your project on this page. Just <a href=
|
||||
"mailto:c++-sig@python.org">post</a> a short description of your project
|
||||
and how Boost.Python helps you get the job done, and we'll add it to this
|
||||
page .</p>
|
||||
<hr>
|
||||
|
||||
<h3>Data Analysis</h3>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><b><a href=
|
||||
"http://www.neuralynx.com">NeuraLab</a></b></dt>
|
||||
|
||||
<dd>Neuralab is a data analysis environment specifically tailored for
|
||||
neural data from <a href="http://www.neuralynx.com">Neuralynx</a>
|
||||
acquisition systems. Neuralab combines presentation quality graphics, a
|
||||
numerical analysis library, and the <a href=
|
||||
"http://www.python.org">Python</a> scripting engine in a single
|
||||
application. With Neuralab, Neuralynx users can perform common analysis
|
||||
tasks with just a few mouse clicks. More advanced users can create
|
||||
custom Python scripts, which can optionally be assigned to menus and
|
||||
mouse clicks.</dd>
|
||||
</dl>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><b>TSLib</b> - <a href="http://www.fortressinv.com">Fortress
|
||||
Investment Group LLC</a></dt>
|
||||
|
||||
<dd>
|
||||
Fortress Investment Group has contracted <a href=
|
||||
"http://www.boost-consulting.com">Boost Consulting</a> to develop
|
||||
core internal financial analysis tools in C++ and to prepare Python
|
||||
bindings for them using Boost.Python.
|
||||
|
||||
<p>Tom Barket of Fortress writes:</p>
|
||||
|
||||
<blockquote>
|
||||
We have a large C++ analytical library specialized for research in
|
||||
finance and economics, built for speed and mission critical
|
||||
stability. Yet Python offers us the flexibility to test out new
|
||||
ideas quickly and increase the productivity of our time versus
|
||||
working in C++. There are several key features which make Python
|
||||
stand out. Its elegance, stability, and breadth of resources on the
|
||||
web are all valuable, but the most important is its extensibility,
|
||||
due to its open source transparency. Boost.Python makes Python
|
||||
extensibility extremely simple and straightforward, yet preserves a
|
||||
great deal of power and control.
|
||||
</blockquote>
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h3>Educational</h3>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><a href="http://edu.kde.org/kig"><b>Kig</b></a></dt>
|
||||
|
||||
<dd>
|
||||
<p>KDE Interactive Geometry is a high-school level educational tool,
|
||||
built for the KDE desktop. It is a nice tool to let students work
|
||||
with geometrical constructions. It is meant to be the most intuitive,
|
||||
yet featureful application of its kind.</p>
|
||||
|
||||
<p>Versions after 0.6.x (will) support objects built by the user
|
||||
himself in the Python language. The exporting of the relevant
|
||||
internal API's were done using Boost.Python, which made the process
|
||||
very easy.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h3>Enterprise Software</h3>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><b><a href="http://openwbem.sourceforge.net">OpenWBEM</a></b></dt>
|
||||
|
||||
<dd>
|
||||
The OpenWBEM project is an effort to develop an open-source
|
||||
implementation of Web Based Enterprise Management suitable for
|
||||
commercial and non-commercial application
|
||||
|
||||
<p><a href="mailto:dnuffer@sco.com">Dan Nuffer</a> writes:</p>
|
||||
|
||||
<blockquote>
|
||||
I'm using Boost.Python to wrap the client API of OpenWBEM.This will
|
||||
make it easier to do rapid prototyping, testing, and scripting when
|
||||
developing management solutions that use WBEM.
|
||||
</blockquote>
|
||||
</dd>
|
||||
|
||||
<dt><b><a href="http://www.transversal.com">Metafaq</a></b></dt>
|
||||
|
||||
<dd>
|
||||
Metafaq, from <a href="http://www.transversal.com">Transversal,
|
||||
Inc.</a>, is an enterprise level online knowledge base management
|
||||
system.
|
||||
|
||||
<p><a href="mailto:ben.young-at-transversal.com">Ben Young</a>
|
||||
writes:</p>
|
||||
|
||||
<blockquote>
|
||||
Boost.Python is used in an automated process to generate python
|
||||
bindings to our api which is exposed though multiple backends and
|
||||
frontends. This allows us to write quick tests and bespoke scripts
|
||||
to perform one off tasks without having to go through the full
|
||||
compilation cycle.
|
||||
</blockquote>
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h3>Games</h3>
|
||||
|
||||
<dl>
|
||||
<dt><b><a href="http://www.firaxis.com">Civilization IV</a></b></dt>
|
||||
</dl>
|
||||
|
||||
<blockquote>
|
||||
“The fourth game in the PC strategy series that has
|
||||
sold over five million copies, Sid Meier's Civilization IV is a bold
|
||||
step forward for the franchise, with spectacular new 3D graphics and
|
||||
all-new single and multiplayer content. Civilization IV will also set a
|
||||
new standard for user-modification, allowing gamers to create their own
|
||||
add-ons using Python and XML.
|
||||
|
||||
<p>Sid Meier's Civilization IV will be released for PC in late 2005.
|
||||
For more information please visit <a href=
|
||||
"http://www.firaxis.com">http://www.firaxis.com</a> or write <a href=
|
||||
"mailto:kgilmore@firaxis.com">kgilmore@firaxis.com</a>”</p>
|
||||
</blockquote>
|
||||
|
||||
<p>Boost.Python is used as the interface layer between the C++ game code
|
||||
and Python. Python is used for many purposes in the game, including map
|
||||
generation, interface screens, game events, tools, tutorials, etc. Most
|
||||
high-level game operations have been exposed to Python in order to give
|
||||
modders the power they need to customize the game.</p>
|
||||
|
||||
<blockquote>
|
||||
-Mustafa Thamer, Civ4 Lead Programmer
|
||||
</blockquote>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><b><a href="http://vegastrike.sourceforge.net">Vega
|
||||
Strike</a></b></dt>
|
||||
|
||||
<dd>
|
||||
<a href="http://vegastrike.sourceforge.net">Vega Strike</a> is the 3D
|
||||
Space Simulator that allows you to trade and bounty hunt in a vast
|
||||
universe. Players face dangers, decisions, piracy, and aliens.
|
||||
|
||||
<p><a href="http://vegastrike.sourceforge.net">Vega Strike</a> has
|
||||
decided to base its scripting on python, using boost as the layer
|
||||
between the class hierarchy in python and the class hierarchy in C++.
|
||||
The result is a very flexible scripting system that treats units as
|
||||
native python classes when designing missions or writing AI's.</p>
|
||||
|
||||
<p>A large economic and planetary simulation is currently being run
|
||||
in the background in python and the results are returned back into
|
||||
C++ in the form of various factions' spaceships appearing near worlds
|
||||
that they are simulated to be near in python if the player is in the
|
||||
general neighborhood.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h3>Graphics</h3>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><b><a href="http://sourceforge.net/projects/pyosg">OpenSceneGraph
|
||||
Bindings</a></b></dt>
|
||||
|
||||
<dd><a href="mailto:gideon@computer.org">Gideon May</a> has created a
|
||||
set of bindings for <a href=
|
||||
"http://www.openscenegraph.org">OpenSceneGraph</a>, a cross-platform
|
||||
C++/OpenGL library for the real-time visualization.<br>
|
||||
</dd>
|
||||
|
||||
<dt><b><a href=
|
||||
"http://www.slac.stanford.edu/grp/ek/hippodraw/index.html">HippoDraw</a></b></dt>
|
||||
|
||||
<dd>
|
||||
HippoDraw is a data analysis environment consisting of a canvas upon
|
||||
which graphs such as histograms, scattter plots, etc, are prsented.
|
||||
It has a highly interactive GUI interface, but some things you need
|
||||
to do with scripts. HippoDraw can be run as Python extension module
|
||||
so that all the manipulation can be done from either Python or the
|
||||
GUI.
|
||||
|
||||
<p>Before the web page came online, <a href=
|
||||
"mailto:Paul_Kunz@SLAC.Stanford.EDU">Paul F. Kunz</a> wrote:</p>
|
||||
|
||||
<blockquote>
|
||||
Don't have a web page for the project, but the organization's is <a
|
||||
href=
|
||||
"http://www.slac.stanford.edu">http://www.slac.stanford.edu</a>
|
||||
(the first web server site in America, I installed it).
|
||||
</blockquote>
|
||||
Which was just too cool a piece of trivia to omit.<br>
|
||||
|
||||
</dd>
|
||||
|
||||
<dt><a href="http://www.iplt.org"><b>IPLT</b></a></dt>
|
||||
|
||||
<dd>
|
||||
<a href="mailto:ansgar.philippsen-at-unibas.ch">Ansgar Philippsen</a>
|
||||
writes:
|
||||
|
||||
<blockquote>
|
||||
IPLT is an image processing library and toolbox for the structural
|
||||
biology electron microscopy community. I would call it a
|
||||
budding/evolving project, since it is currently not in production
|
||||
stage, but rather under heavy development. Python is used as the
|
||||
main scripting/interaction level, but also for rapid prototyping,
|
||||
since the underlying C++ class library is pretty much fully exposed
|
||||
via boost.python (at least the high-level interface). The combined
|
||||
power of C++ and Python for this project turned out to be just
|
||||
awesome.
|
||||
</blockquote>
|
||||
<br>
|
||||
|
||||
</dd>
|
||||
|
||||
<dt><a href=
|
||||
"http://www.procoders.net/pythonmagick"><b>PythonMagick</b></a></dt>
|
||||
|
||||
<dd>PythonMagick binds the <a href=
|
||||
"http://www.graphicsmagick.org">GraphicsMagick</a> image manipulation
|
||||
library to Python.<br>
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h3>Scientific Computing</h3>
|
||||
|
||||
<dl class="page index">
|
||||
<dt><a href="http://camfr.sourceforge.net"><b>CAMFR</b></a></dt>
|
||||
|
||||
<dd>
|
||||
CAMFR is a photonics and electromagnetics modelling tool. Python is
|
||||
used for computational steering.
|
||||
|
||||
<p><a href="mailto:Peter.Bienstman@rug.ac.be">Peter Bienstman</a>
|
||||
writes:</p>
|
||||
|
||||
<blockquote>
|
||||
Thanks for providing such a great tool!
|
||||
</blockquote>
|
||||
</dd>
|
||||
|
||||
<dt><a href="http://cctbx.sourceforge.net"><b>cctbx - Computational
|
||||
Crystallography Toolbox</b></a></dt>
|
||||
|
||||
<dd>
|
||||
Computational Crystallography is concerned with the derivation of
|
||||
atomic models of crystal structures, given experimental X-ray
|
||||
diffraction data. The cctbx is an open-source library of fundamental
|
||||
algorithms for crystallographic computations. The core algorithms are
|
||||
implemented in C++ and accessed through higher-level Python
|
||||
interfaces.
|
||||
|
||||
<p>The cctbx grew together with Boost.Python and is designed from the
|
||||
ground up as a hybrid Python/C++ system. With one minor exception,
|
||||
run-time polymorphism is completely handled by Python. C++
|
||||
compile-time polymorphism is used to implement performance critical
|
||||
algorithms. The Python and C++ layers are seamlessly integrated using
|
||||
Boost.Python.</p>
|
||||
|
||||
<p>The SourceForge cctbx project is organized in modules to
|
||||
facilitate use in non-crystallographic applications. The scitbx
|
||||
module implements a general purpose array family for scientific
|
||||
applications and pure C++ ports of FFTPACK and the LBFGS conjugate
|
||||
gradient minimizer.</p>
|
||||
</dd>
|
||||
|
||||
<dt><a href="http://www.llnl.gov/CASC/emsolve"><b>EMSolve</b></a></dt>
|
||||
|
||||
<dd>EMSolve is a provably stable, charge conserving, and energy
|
||||
conserving solver for Maxwell's equations.<br>
|
||||
</dd>
|
||||
|
||||
<dt><b><a href="http://cern.ch/gaudi">Gaudi</a></b> and <b><a href=
|
||||
"http://cern.ch/Gaudi/RootPython/">RootPython</a></b></dt>
|
||||
|
||||
<dd>
|
||||
Gaudi is a framework for particle physics collision data processing
|
||||
applications developed in the context of the LHCb and ATLAS
|
||||
experiments at CERN.
|
||||
|
||||
<p><a href="mailto:Pere.Mato@cern.ch">Pere Mato Vila</a> writes:</p>
|
||||
|
||||
<blockquote>
|
||||
We are using Boost.Python to provide scripting/interactive
|
||||
capability to our framework. We have a module called "GaudiPython"
|
||||
implemented using Boost.Python that allows the interaction with any
|
||||
framework service or algorithm from python. RootPython also uses
|
||||
Boost.Python to provide a generic "gateway" between the <a href=
|
||||
"http://root.cern.ch">ROOT</a> framework and python
|
||||
|
||||
<p>Boost.Python is great. We managed very quickly to interface our
|
||||
framework to python, which is great language. We are trying to
|
||||
facilitate to our physicists (end-users) a rapid analysis
|
||||
application development environment based on python. For that,
|
||||
Boost.Python plays and essential role.</p>
|
||||
</blockquote>
|
||||
</dd>
|
||||
|
||||
<dt><b><a href="http://www.esss.com.br">ESSS</a></b></dt>
|
||||
|
||||
<dd>
|
||||
ESSS (Engineering Simulation and Scientific Software) is a company
|
||||
that provides engineering solutions and acts in the brazilian and
|
||||
south-american market providing products and services related to
|
||||
Computational Fluid Dynamics and Image Analysis.
|
||||
|
||||
<p><a href="mailto:bruno@esss.com.br">Bruno da Silva de Oliveira</a>
|
||||
writes:</p>
|
||||
|
||||
<blockquote>
|
||||
Recently we moved our work from working exclusively with C++ to an
|
||||
hybrid-language approach, using Python and C++, with Boost.Python
|
||||
providing the layer between the two. The results are great so far!
|
||||
</blockquote>
|
||||
|
||||
<p>Two projects have been developed so far with this technology:</p>
|
||||
|
||||
<p><b><a href="http://www.esss.com.br/index.php?pg=dev_projetos">Simba</a></b>
|
||||
provides 3D visualization of geological formations gattered from the
|
||||
simulation of the evolution of oil systems, allowing the user to
|
||||
analyse various aspects of the simulation, like deformation, pressure
|
||||
and fluids, along the time of the simulation.</p>
|
||||
|
||||
<p><b><a href="http://www.esss.com.br/index.php?pg=dev_projetos">Aero</a></b>
|
||||
aims to construct a CFD with brazilian technology, which involves
|
||||
various companies and universities. ESSS is responsible for various
|
||||
of the application modules, including GUI and post-processing of
|
||||
results.</p>
|
||||
</dd>
|
||||
|
||||
<dt><b><a href="http://www.rationaldiscovery.com">Rational Discovery
|
||||
LLC</a></b></dt>
|
||||
|
||||
<dd>
|
||||
Rational Discovery provides computational modeling, combinatorial
|
||||
library design and custom software development services to the
|
||||
pharmaceutical, biotech and chemical industries. We do a substantial
|
||||
amount of internal research to develop new approaches for applying
|
||||
machine-learning techniques to solve chemical problems. Because we're
|
||||
a small organization and chemistry is a large and complex field, it
|
||||
is essential that we be able to quickly and easily prototype and test
|
||||
new algorithms.
|
||||
|
||||
<p>For our internal software, we implement core data structures in C
|
||||
and expose them to Python using Boost.Python. Algorithm development
|
||||
is done in Python and then translated to C if required (often it's
|
||||
not). This hybrid development approach not only greatly increases our
|
||||
productivity, but it also allows "non-developers" (people without C
|
||||
experience) to take part in method development. Learning C is a
|
||||
daunting task, but "Python fits your brain." (Thanks to Bruce Eckel
|
||||
for the quote.)</p>
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h3>Systems Libraries</h3>
|
||||
|
||||
<dl>
|
||||
<dt><a href="http://itamarst.org/software"><b>Fusion</b></a></dt>
|
||||
|
||||
<dd>
|
||||
<p>Fusion is a library that supports implementing protocols in C++
|
||||
for use with Twisted, allowing control over memory allocation
|
||||
strategies, fast method calls internally, etc.. Fusion supports TCP,
|
||||
UDP and multicast, and is implemented using the Boost.Python python
|
||||
bindings.</p>
|
||||
|
||||
<p>Fusion is licensed under the MIT license, and available for
|
||||
download from <a href=
|
||||
"http://itamarst.org/software">http://itamarst.org/software</a>.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h3>Tools</h3>
|
||||
|
||||
<dl>
|
||||
<dt><a href="http://www.jayacard.org"><b>Jayacard</b></a></dt>
|
||||
|
||||
<dd>
|
||||
Jayacard aims at developing a secure portable open source operating
|
||||
system for contactless smart cards and a complete suite of high
|
||||
quality development tools to ease smart card OS and application
|
||||
development.
|
||||
|
||||
<p>The core of the smart card reader management is written in C++ but
|
||||
all the development tools are written in the friendly Python
|
||||
language. Boost plays the fundamental role of binding the tools to
|
||||
our core smart card reader library.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
<hr>
|
||||
|
||||
<p>Revised
|
||||
<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
|
||||
15 July, 2003</p>
|
||||
|
||||
<p><i>© Copyright <a href="../../../people/dave_abrahams.htm">Dave
|
||||
Abrahams</a> 2002-2003.</i></p>
|
||||
</body>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
"HTML Tidy for Cygwin (vers 1st September 2004), see www.w3.org">
|
||||
<meta http-equiv="Content-Type" content="text/html">
|
||||
<link rel="stylesheet" type="text/css" href="boost.css">
|
||||
|
||||
<title>Boost.Python - Projects using Boost.Python</title>
|
||||
</head>
|
||||
|
||||
<body link="#0000FF" vlink="#800080">
|
||||
<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
|
||||
"header">
|
||||
<tr>
|
||||
<td valign="top" width="300">
|
||||
<h3><a href="../../../index.htm"><img height="86" width="277" alt=
|
||||
"C++ Boost" src="../../../boost.png" border="0"></a></h3>
|
||||
</td>
|
||||
|
||||
<td valign="top">
|
||||
<h1 align="center"><a href="index.html">Boost.Python</a></h1>
|
||||
|
||||
<h2 align="center">Projects using Boost.Python</h2>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<hr>
|
||||
|
||||
<h2>Introduction</h2>
|
||||
|
||||
<p>This is a partial list of projects using Boost.Python. If you are using
|
||||
Boost.Python as your Python/C++ binding solution, we'd be proud to list
|
||||
your project on this page. Just <a href=
|
||||
"mailto:c++-sig@python.org">post</a> a short description of your project
|
||||
and how Boost.Python helps you get the job done, and we'll add it to this
|
||||
page .</p>
|
||||
<hr>
|
||||
|
||||
<h3>Data Analysis</h3>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><b><a href="http://www.neuralynx.com">NeuraLab</a></b></dt>
|
||||
|
||||
<dd>Neuralab is a data analysis environment specifically tailored for
|
||||
neural data from <a href="http://www.neuralynx.com">Neuralynx</a>
|
||||
acquisition systems. Neuralab combines presentation quality graphics, a
|
||||
numerical analysis library, and the <a href=
|
||||
"http://www.python.org">Python</a> scripting engine in a single
|
||||
application. With Neuralab, Neuralynx users can perform common analysis
|
||||
tasks with just a few mouse clicks. More advanced users can create custom
|
||||
Python scripts, which can optionally be assigned to menus and mouse
|
||||
clicks.</dd>
|
||||
</dl>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><b>TSLib</b> - <a href="http://www.fortressinv.com">Fortress
|
||||
Investment Group LLC</a></dt>
|
||||
|
||||
<dd>
|
||||
Fortress Investment Group has contracted <a href=
|
||||
"http://www.boost-consulting.com">Boost Consulting</a> to develop core
|
||||
internal financial analysis tools in C++ and to prepare Python bindings
|
||||
for them using Boost.Python.
|
||||
|
||||
<p>Tom Barket of Fortress writes:</p>
|
||||
|
||||
<blockquote>
|
||||
We have a large C++ analytical library specialized for research in
|
||||
finance and economics, built for speed and mission critical
|
||||
stability. Yet Python offers us the flexibility to test out new ideas
|
||||
quickly and increase the productivity of our time versus working in
|
||||
C++. There are several key features which make Python stand out. Its
|
||||
elegance, stability, and breadth of resources on the web are all
|
||||
valuable, but the most important is its extensibility, due to its
|
||||
open source transparency. Boost.Python makes Python extensibility
|
||||
extremely simple and straightforward, yet preserves a great deal of
|
||||
power and control.
|
||||
</blockquote>
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h3>Educational</h3>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><a href="http://edu.kde.org/kig"><b>Kig</b></a></dt>
|
||||
|
||||
<dd>
|
||||
<p>KDE Interactive Geometry is a high-school level educational tool,
|
||||
built for the KDE desktop. It is a nice tool to let students work with
|
||||
geometrical constructions. It is meant to be the most intuitive, yet
|
||||
featureful application of its kind.</p>
|
||||
|
||||
<p>Versions after 0.6.x (will) support objects built by the user
|
||||
himself in the Python language. The exporting of the relevant internal
|
||||
API's were done using Boost.Python, which made the process very
|
||||
easy.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h3>Enterprise Software</h3>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><b><a href="http://openwbem.sourceforge.net">OpenWBEM</a></b></dt>
|
||||
|
||||
<dd>
|
||||
The OpenWBEM project is an effort to develop an open-source
|
||||
implementation of Web Based Enterprise Management suitable for
|
||||
commercial and non-commercial application
|
||||
|
||||
<p><a href="mailto:dnuffer@sco.com">Dan Nuffer</a> writes:</p>
|
||||
|
||||
<blockquote>
|
||||
I'm using Boost.Python to wrap the client API of OpenWBEM.This will
|
||||
make it easier to do rapid prototyping, testing, and scripting when
|
||||
developing management solutions that use WBEM.
|
||||
</blockquote>
|
||||
</dd>
|
||||
|
||||
<dt><b><a href="http://www.transversal.com">Metafaq</a></b></dt>
|
||||
|
||||
<dd>
|
||||
Metafaq, from <a href="http://www.transversal.com">Transversal,
|
||||
Inc.</a>, is an enterprise level online knowledge base management
|
||||
system.
|
||||
|
||||
<p><a href="mailto:ben.young-at-transversal.com">Ben Young</a>
|
||||
writes:</p>
|
||||
|
||||
<blockquote>
|
||||
Boost.Python is used in an automated process to generate python
|
||||
bindings to our api which is exposed though multiple backends and
|
||||
frontends. This allows us to write quick tests and bespoke scripts to
|
||||
perform one off tasks without having to go through the full
|
||||
compilation cycle.
|
||||
</blockquote>
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h3>Games</h3>
|
||||
|
||||
<dl>
|
||||
<dt><b><a href="http://www.firaxis.com">Civilization IV</a></b></dt>
|
||||
</dl>
|
||||
|
||||
<blockquote>
|
||||
“The fourth game in the PC strategy series that has sold over five
|
||||
million copies, Sid Meier's Civilization IV is a bold step forward for
|
||||
the franchise, with spectacular new 3D graphics and all-new single and
|
||||
multiplayer content. Civilization IV will also set a new standard for
|
||||
user-modification, allowing gamers to create their own add-ons using
|
||||
Python and XML.
|
||||
|
||||
<p>Sid Meier's Civilization IV will be released for PC in late 2005. For
|
||||
more information please visit <a href=
|
||||
"http://www.firaxis.com">http://www.firaxis.com</a> or write <a href=
|
||||
"mailto:kgilmore@firaxis.com">kgilmore@firaxis.com</a>”</p>
|
||||
</blockquote>
|
||||
|
||||
<p>Boost.Python is used as the interface layer between the C++ game code
|
||||
and Python. Python is used for many purposes in the game, including map
|
||||
generation, interface screens, game events, tools, tutorials, etc. Most
|
||||
high-level game operations have been exposed to Python in order to give
|
||||
modders the power they need to customize the game.</p>
|
||||
|
||||
<blockquote>
|
||||
-Mustafa Thamer, Civ4 Lead Programmer
|
||||
</blockquote>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><b><a href="http://vegastrike.sourceforge.net">Vega
|
||||
Strike</a></b></dt>
|
||||
|
||||
<dd>
|
||||
<a href="http://vegastrike.sourceforge.net">Vega Strike</a> is the 3D
|
||||
Space Simulator that allows you to trade and bounty hunt in a vast
|
||||
universe. Players face dangers, decisions, piracy, and aliens.
|
||||
|
||||
<p><a href="http://vegastrike.sourceforge.net">Vega Strike</a> has
|
||||
decided to base its scripting on python, using boost as the layer
|
||||
between the class hierarchy in python and the class hierarchy in C++.
|
||||
The result is a very flexible scripting system that treats units as
|
||||
native python classes when designing missions or writing AI's.</p>
|
||||
|
||||
<p>A large economic and planetary simulation is currently being run in
|
||||
the background in python and the results are returned back into C++ in
|
||||
the form of various factions' spaceships appearing near worlds that
|
||||
they are simulated to be near in python if the player is in the general
|
||||
neighborhood.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h3>Graphics</h3>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><b><a href="http://sourceforge.net/projects/pyosg">OpenSceneGraph
|
||||
Bindings</a></b></dt>
|
||||
|
||||
<dd><a href="mailto:gideon@computer.org">Gideon May</a> has created a set
|
||||
of bindings for <a href=
|
||||
"http://www.openscenegraph.org">OpenSceneGraph</a>, a cross-platform
|
||||
C++/OpenGL library for the real-time visualization.<br>
|
||||
</dd>
|
||||
|
||||
<dt><b><a href=
|
||||
"http://www.slac.stanford.edu/grp/ek/hippodraw/index.html">HippoDraw</a></b></dt>
|
||||
|
||||
<dd>
|
||||
HippoDraw is a data analysis environment consisting of a canvas upon
|
||||
which graphs such as histograms, scattter plots, etc, are prsented. It
|
||||
has a highly interactive GUI interface, but some things you need to do
|
||||
with scripts. HippoDraw can be run as Python extension module so that
|
||||
all the manipulation can be done from either Python or the GUI.
|
||||
|
||||
<p>Before the web page came online, <a href=
|
||||
"mailto:Paul_Kunz@SLAC.Stanford.EDU">Paul F. Kunz</a> wrote:</p>
|
||||
|
||||
<blockquote>
|
||||
Don't have a web page for the project, but the organization's is
|
||||
<a href=
|
||||
"http://www.slac.stanford.edu">http://www.slac.stanford.edu</a> (the
|
||||
first web server site in America, I installed it).
|
||||
</blockquote>Which was just too cool a piece of trivia to omit.<br>
|
||||
|
||||
</dd>
|
||||
|
||||
<dt><a href="http://www.iplt.org"><b>IPLT</b></a></dt>
|
||||
|
||||
<dd>
|
||||
<a href="mailto:ansgar.philippsen-at-unibas.ch">Ansgar Philippsen</a>
|
||||
writes:
|
||||
|
||||
<blockquote>
|
||||
IPLT is an image processing library and toolbox for the structural
|
||||
biology electron microscopy community. I would call it a
|
||||
budding/evolving project, since it is currently not in production
|
||||
stage, but rather under heavy development. Python is used as the main
|
||||
scripting/interaction level, but also for rapid prototyping, since
|
||||
the underlying C++ class library is pretty much fully exposed via
|
||||
boost.python (at least the high-level interface). The combined power
|
||||
of C++ and Python for this project turned out to be just awesome.
|
||||
</blockquote><br>
|
||||
|
||||
</dd>
|
||||
|
||||
<dt><a href=
|
||||
"http://www.procoders.net/pythonmagick"><b>PythonMagick</b></a></dt>
|
||||
|
||||
<dd>PythonMagick binds the <a href=
|
||||
"http://www.graphicsmagick.org">GraphicsMagick</a> image manipulation
|
||||
library to Python.<br>
|
||||
</dd>
|
||||
|
||||
<dt><a href="http://www.vpython.org"><b>VPython</b></a></dt>
|
||||
|
||||
<dd>
|
||||
<a href="mailto:Bruce_Sherwood-at-ncsu.edu">Bruce Sherwood</a> writes:
|
||||
|
||||
<blockquote>
|
||||
VPython is an extension for Python that makes it easy to create
|
||||
navigable 3D animations, which are generated as a side effect of
|
||||
computational code. VPython is used in education for various
|
||||
purposes, including teaching physics and programming, but it has also
|
||||
been used by research scientists to visualize systems or data in 3D.
|
||||
</blockquote><br>
|
||||
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h3>Scientific Computing</h3>
|
||||
|
||||
<dl class="page index">
|
||||
<dt><a href="http://camfr.sourceforge.net"><b>CAMFR</b></a></dt>
|
||||
|
||||
<dd>
|
||||
CAMFR is a photonics and electromagnetics modelling tool. Python is
|
||||
used for computational steering.
|
||||
|
||||
<p><a href="mailto:Peter.Bienstman@rug.ac.be">Peter Bienstman</a>
|
||||
writes:</p>
|
||||
|
||||
<blockquote>
|
||||
Thanks for providing such a great tool!
|
||||
</blockquote>
|
||||
</dd>
|
||||
|
||||
<dt><a href="http://cctbx.sourceforge.net"><b>cctbx - Computational
|
||||
Crystallography Toolbox</b></a></dt>
|
||||
|
||||
<dd>
|
||||
Computational Crystallography is concerned with the derivation of
|
||||
atomic models of crystal structures, given experimental X-ray
|
||||
diffraction data. The cctbx is an open-source library of fundamental
|
||||
algorithms for crystallographic computations. The core algorithms are
|
||||
implemented in C++ and accessed through higher-level Python interfaces.
|
||||
|
||||
<p>The cctbx grew together with Boost.Python and is designed from the
|
||||
ground up as a hybrid Python/C++ system. With one minor exception,
|
||||
run-time polymorphism is completely handled by Python. C++ compile-time
|
||||
polymorphism is used to implement performance critical algorithms. The
|
||||
Python and C++ layers are seamlessly integrated using Boost.Python.</p>
|
||||
|
||||
<p>The SourceForge cctbx project is organized in modules to facilitate
|
||||
use in non-crystallographic applications. The scitbx module implements
|
||||
a general purpose array family for scientific applications and pure C++
|
||||
ports of FFTPACK and the L-BFGS quasi-Newton minimizer.</p>
|
||||
</dd>
|
||||
|
||||
<dt><a href="http://www.llnl.gov/CASC/emsolve"><b>EMSolve</b></a></dt>
|
||||
|
||||
<dd>EMSolve is a provably stable, charge conserving, and energy
|
||||
conserving solver for Maxwell's equations.<br>
|
||||
</dd>
|
||||
|
||||
<dt><b><a href="http://cern.ch/gaudi">Gaudi</a></b> and <b><a href=
|
||||
"http://cern.ch/Gaudi/RootPython/">RootPython</a></b></dt>
|
||||
|
||||
<dd>
|
||||
Gaudi is a framework for particle physics collision data processing
|
||||
applications developed in the context of the LHCb and ATLAS experiments
|
||||
at CERN.
|
||||
|
||||
<p><a href="mailto:Pere.Mato@cern.ch">Pere Mato Vila</a> writes:</p>
|
||||
|
||||
<blockquote>
|
||||
We are using Boost.Python to provide scripting/interactive capability
|
||||
to our framework. We have a module called "GaudiPython" implemented
|
||||
using Boost.Python that allows the interaction with any framework
|
||||
service or algorithm from python. RootPython also uses Boost.Python
|
||||
to provide a generic "gateway" between the <a href=
|
||||
"http://root.cern.ch">ROOT</a> framework and python
|
||||
|
||||
<p>Boost.Python is great. We managed very quickly to interface our
|
||||
framework to python, which is great language. We are trying to
|
||||
facilitate to our physicists (end-users) a rapid analysis application
|
||||
development environment based on python. For that, Boost.Python plays
|
||||
and essential role.</p>
|
||||
</blockquote>
|
||||
</dd>
|
||||
|
||||
<dt><b><a href="http://www.esss.com.br">ESSS</a></b></dt>
|
||||
|
||||
<dd>
|
||||
ESSS (Engineering Simulation and Scientific Software) is a company that
|
||||
provides engineering solutions and acts in the brazilian and
|
||||
south-american market providing products and services related to
|
||||
Computational Fluid Dynamics and Image Analysis.
|
||||
|
||||
<p><a href="mailto:bruno@esss.com.br">Bruno da Silva de Oliveira</a>
|
||||
writes:</p>
|
||||
|
||||
<blockquote>
|
||||
Recently we moved our work from working exclusively with C++ to an
|
||||
hybrid-language approach, using Python and C++, with Boost.Python
|
||||
providing the layer between the two. The results are great so far!
|
||||
</blockquote>
|
||||
|
||||
<p>Two projects have been developed so far with this technology:</p>
|
||||
|
||||
<p><b><a href=
|
||||
"http://www.esss.com.br/index.php?pg=dev_projetos">Simba</a></b>
|
||||
provides 3D visualization of geological formations gattered from the
|
||||
simulation of the evolution of oil systems, allowing the user to
|
||||
analyse various aspects of the simulation, like deformation, pressure
|
||||
and fluids, along the time of the simulation.</p>
|
||||
|
||||
<p><b><a href=
|
||||
"http://www.esss.com.br/index.php?pg=dev_projetos">Aero</a></b> aims to
|
||||
construct a CFD with brazilian technology, which involves various
|
||||
companies and universities. ESSS is responsible for various of the
|
||||
application modules, including GUI and post-processing of results.</p>
|
||||
</dd>
|
||||
|
||||
<dt><b><a href="http://www.rationaldiscovery.com">Rational Discovery
|
||||
LLC</a></b></dt>
|
||||
|
||||
<dd>
|
||||
Rational Discovery provides computational modeling, combinatorial
|
||||
library design and custom software development services to the
|
||||
pharmaceutical, biotech and chemical industries. We do a substantial
|
||||
amount of internal research to develop new approaches for applying
|
||||
machine-learning techniques to solve chemical problems. Because we're a
|
||||
small organization and chemistry is a large and complex field, it is
|
||||
essential that we be able to quickly and easily prototype and test new
|
||||
algorithms.
|
||||
|
||||
<p>For our internal software, we implement core data structures in C
|
||||
and expose them to Python using Boost.Python. Algorithm development is
|
||||
done in Python and then translated to C if required (often it's not).
|
||||
This hybrid development approach not only greatly increases our
|
||||
productivity, but it also allows "non-developers" (people without C
|
||||
experience) to take part in method development. Learning C is a
|
||||
daunting task, but "Python fits your brain." (Thanks to Bruce Eckel for
|
||||
the quote.)</p>
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h3>Systems Libraries</h3>
|
||||
|
||||
<dl>
|
||||
<dt><a href="http://itamarst.org/software"><b>Fusion</b></a></dt>
|
||||
|
||||
<dd>
|
||||
<p>Fusion is a library that supports implementing protocols in C++ for
|
||||
use with Twisted, allowing control over memory allocation strategies,
|
||||
fast method calls internally, etc.. Fusion supports TCP, UDP and
|
||||
multicast, and is implemented using the Boost.Python python
|
||||
bindings.</p>
|
||||
|
||||
<p>Fusion is licensed under the MIT license, and available for download
|
||||
from <a href=
|
||||
"http://itamarst.org/software">http://itamarst.org/software</a>.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h3>Tools</h3>
|
||||
|
||||
<dl>
|
||||
<dt><a href="http://www.jayacard.org"><b>Jayacard</b></a></dt>
|
||||
|
||||
<dd>
|
||||
Jayacard aims at developing a secure portable open source operating
|
||||
system for contactless smart cards and a complete suite of high quality
|
||||
development tools to ease smart card OS and application development.
|
||||
|
||||
<p>The core of the smart card reader management is written in C++ but
|
||||
all the development tools are written in the friendly Python language.
|
||||
Boost plays the fundamental role of binding the tools to our core smart
|
||||
card reader library.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
<hr>
|
||||
|
||||
<p>Revised
|
||||
<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
|
||||
15 July, 2003</p>
|
||||
|
||||
<p><i>© Copyright <a href="../../../people/dave_abrahams.htm">Dave
|
||||
Abrahams</a> 2002-2003.</i></p>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,3 +1,6 @@
|
||||
# Copyright Joel de Guzman 2006. Distributed under the Boost
|
||||
# Software License, Version 1.0. (See accompanying
|
||||
# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
project boost/libs/python/doc/tutorial/doc ;
|
||||
|
||||
import boostbook : boostbook ;
|
||||
|
||||
@@ -23,23 +23,24 @@
|
||||
|
||||
p
|
||||
{
|
||||
text-align: justify;
|
||||
font-size: 11pt;
|
||||
line-height: 1.2;
|
||||
text-align: left;
|
||||
font-size: 10pt;
|
||||
line-height: 1.15;
|
||||
}
|
||||
|
||||
/*=============================================================================
|
||||
Program listings
|
||||
=============================================================================*/
|
||||
|
||||
tt.computeroutput
|
||||
/* Code on paragraphs */
|
||||
p tt.computeroutput
|
||||
{
|
||||
font-size: 10pt;
|
||||
font-size: 9pt;
|
||||
}
|
||||
|
||||
pre.synopsis
|
||||
{
|
||||
font-size: 10pt;
|
||||
font-size: 90%;
|
||||
margin: 1pc 4% 0pc 4%;
|
||||
padding: 0.5pc 0.5pc 0.5pc 0.5pc;
|
||||
}
|
||||
@@ -47,32 +48,36 @@
|
||||
.programlisting,
|
||||
.screen
|
||||
{
|
||||
font-size: 10pt;
|
||||
font-size: 9pt;
|
||||
display: block;
|
||||
margin: 1pc 4% 0pc 4%;
|
||||
padding: 0.5pc 0.5pc 0.5pc 0.5pc;
|
||||
}
|
||||
|
||||
/* Program listings in tables don't get borders */
|
||||
td .programlisting,
|
||||
td .screen
|
||||
{
|
||||
margin: 0pc 0pc 0pc 0pc;
|
||||
padding: 0pc 0pc 0pc 0pc;
|
||||
}
|
||||
|
||||
/*=============================================================================
|
||||
Headings
|
||||
=============================================================================*/
|
||||
|
||||
h1,
|
||||
h2,
|
||||
h3,
|
||||
h4,
|
||||
h5,
|
||||
h6
|
||||
h1, h2, h3, h4, h5, h6
|
||||
{
|
||||
text-align: left;
|
||||
margin-top: 2pc;
|
||||
margin: 1em 0em 0.5em 0em;
|
||||
font-weight: bold;
|
||||
}
|
||||
|
||||
h1 { font: 170% }
|
||||
h1 { font: 140% }
|
||||
h2 { font: bold 140% }
|
||||
h3 { font: bold 120% }
|
||||
h4 { font: bold 100% }
|
||||
h5 { font: italic 100% }
|
||||
h3 { font: bold 130% }
|
||||
h4 { font: bold 120% }
|
||||
h5 { font: italic 110% }
|
||||
h6 { font: italic 100% }
|
||||
|
||||
/* Top page titles */
|
||||
@@ -89,12 +94,41 @@
|
||||
margin-bottom: 1pc;
|
||||
}
|
||||
|
||||
h1.title { font-size: 220% }
|
||||
h2.title { font-size: 220% }
|
||||
h3.title { font-size: 170% }
|
||||
h4.title { font-size: 140% }
|
||||
h5.title { font-size: 120% }
|
||||
h6.title { font-size: 120% }
|
||||
h1.title { font-size: 140% }
|
||||
h2.title { font-size: 140% }
|
||||
h3.title { font-size: 130% }
|
||||
h4.title { font-size: 120% }
|
||||
h5.title { font-size: 110% }
|
||||
h6.title { font-size: 100% }
|
||||
|
||||
.section h1
|
||||
{
|
||||
margin: 0em 0em 0.5em 0em;
|
||||
font-size: 140%;
|
||||
}
|
||||
|
||||
.section h2 { font-size: 140% }
|
||||
.section h3 { font-size: 130% }
|
||||
.section h4 { font-size: 120% }
|
||||
.section h5 { font-size: 110% }
|
||||
.section h6 { font-size: 100% }
|
||||
|
||||
/* Code on titles */
|
||||
h1 tt.computeroutput { font-size: 140% }
|
||||
h2 tt.computeroutput { font-size: 140% }
|
||||
h3 tt.computeroutput { font-size: 130% }
|
||||
h4 tt.computeroutput { font-size: 120% }
|
||||
h5 tt.computeroutput { font-size: 110% }
|
||||
h6 tt.computeroutput { font-size: 100% }
|
||||
|
||||
/*=============================================================================
|
||||
Author
|
||||
=============================================================================*/
|
||||
|
||||
h3.author
|
||||
{
|
||||
font-size: 100%
|
||||
}
|
||||
|
||||
/*=============================================================================
|
||||
Lists
|
||||
@@ -102,20 +136,20 @@
|
||||
|
||||
li
|
||||
{
|
||||
font-size: 11pt;
|
||||
font-size: 10pt;
|
||||
line-height: 1.3;
|
||||
}
|
||||
|
||||
/* Unordered lists */
|
||||
ul
|
||||
{
|
||||
text-align: justify;
|
||||
text-align: left;
|
||||
}
|
||||
|
||||
/* Ordered lists */
|
||||
ol
|
||||
{
|
||||
text-align: justify;
|
||||
text-align: left;
|
||||
}
|
||||
|
||||
/*=============================================================================
|
||||
@@ -159,9 +193,9 @@
|
||||
.toc
|
||||
{
|
||||
margin: 1pc 4% 0pc 4%;
|
||||
padding: 0.5pc;
|
||||
font-size: 11pt;
|
||||
line-height: 1.3;
|
||||
padding: 0.1pc 1pc 0.1pc 1pc;
|
||||
font-size: 80%;
|
||||
line-height: 1.15;
|
||||
}
|
||||
|
||||
.boost-toc
|
||||
@@ -180,7 +214,6 @@
|
||||
margin-left: 4%;
|
||||
padding-right: 0.5em;
|
||||
padding-left: 0.5em;
|
||||
font-size: 120%;
|
||||
}
|
||||
|
||||
.informaltable table,
|
||||
@@ -202,8 +235,8 @@
|
||||
div.table table tr td
|
||||
{
|
||||
padding: 0.5em;
|
||||
text-align: justify;
|
||||
font-size: 11pt;
|
||||
text-align: left;
|
||||
font-size: 9pt;
|
||||
}
|
||||
|
||||
div.informaltable table tr th,
|
||||
@@ -211,51 +244,76 @@
|
||||
{
|
||||
padding: 0.5em 0.5em 0.5em 0.5em;
|
||||
border: 1pt solid white;
|
||||
font-size: 80%;
|
||||
}
|
||||
|
||||
/*=============================================================================
|
||||
Blurbs
|
||||
=============================================================================*/
|
||||
|
||||
div.informaltable table tr td.blurb
|
||||
div.note,
|
||||
div.tip,
|
||||
div.important,
|
||||
div.caution,
|
||||
div.warning,
|
||||
p.blurb
|
||||
{
|
||||
font-size: 10pt; /* A little bit smaller than the main text */
|
||||
font-size: 9pt; /* A little bit smaller than the main text */
|
||||
line-height: 1.2;
|
||||
display: block;
|
||||
margin: 1pc 4% 0pc 4%;
|
||||
padding: 0.5pc 0.5pc 0.5pc 0.5pc;
|
||||
}
|
||||
|
||||
td.blurb img
|
||||
p.blurb img
|
||||
{
|
||||
padding: 1pt;
|
||||
}
|
||||
|
||||
/*=============================================================================
|
||||
Misc
|
||||
Variable Lists
|
||||
=============================================================================*/
|
||||
|
||||
/* Tone down the title of Parameter lists */
|
||||
div.variablelist p.title
|
||||
/* Make the terms in definition lists bold */
|
||||
div.variablelist dl dt,
|
||||
span.term
|
||||
{
|
||||
font-weight: bold;
|
||||
font-size: 100%;
|
||||
text-align: left;
|
||||
font-size: 10pt;
|
||||
}
|
||||
|
||||
/* Tabularize parameter lists */
|
||||
|
||||
div.variablelist table tbody tr td
|
||||
{
|
||||
text-align: left;
|
||||
vertical-align: top;
|
||||
padding: 0em 2em 0em 0em;
|
||||
font-size: 10pt;
|
||||
margin: 0em 0em 0.5em 0em;
|
||||
line-height: 1;
|
||||
}
|
||||
|
||||
div.variablelist dl dt
|
||||
{
|
||||
float: left;
|
||||
clear: left;
|
||||
display: block;
|
||||
font-style: italic;
|
||||
margin-bottom: 0.2em;
|
||||
}
|
||||
|
||||
|
||||
div.variablelist dl dd
|
||||
{
|
||||
display: block;
|
||||
clear: right;
|
||||
padding-left: 8pc;
|
||||
margin: 0em 0em 0.5em 2em;
|
||||
font-size: 10pt;
|
||||
}
|
||||
|
||||
div.variablelist table tbody tr td p,
|
||||
div.variablelist dl dd p
|
||||
{
|
||||
margin: 0em 0em 0.5em 0em;
|
||||
line-height: 1;
|
||||
}
|
||||
|
||||
/*=============================================================================
|
||||
Misc
|
||||
=============================================================================*/
|
||||
|
||||
/* Title of books and articles in bibliographies */
|
||||
span.title
|
||||
{
|
||||
@@ -294,6 +352,14 @@
|
||||
{
|
||||
color: #9c5a9c;
|
||||
}
|
||||
|
||||
h1 a, h2 a, h3 a, h4 a, h5 a, h6 a,
|
||||
h1 a:hover, h2 a:hover, h3 a:hover, h4 a:hover, h5 a:hover, h6 a:hover,
|
||||
h1 a:visited, h2 a:visited, h3 a:visited, h4 a:visited, h5 a:visited, h6 a:visited
|
||||
{
|
||||
text-decoration: none; /* no underline */
|
||||
color: #000000;
|
||||
}
|
||||
|
||||
/* Syntax Highlighting */
|
||||
.keyword { color: #0000AA; }
|
||||
@@ -322,41 +388,50 @@
|
||||
/* Program listing */
|
||||
pre.synopsis
|
||||
{
|
||||
background-color: #F3F3F3;
|
||||
border: 1pt solid #C0C0C0;
|
||||
border: 1px solid #DCDCDC;
|
||||
}
|
||||
|
||||
.programlisting,
|
||||
.screen
|
||||
{
|
||||
background-color: #F3F3F3;
|
||||
border: 1pt solid #C0C0C0;
|
||||
border: 1px solid #DCDCDC;
|
||||
}
|
||||
|
||||
td .programlisting,
|
||||
td .screen
|
||||
{
|
||||
border: 0px solid #DCDCDC;
|
||||
}
|
||||
|
||||
/* Blurbs */
|
||||
div.informaltable table tr td.blurb
|
||||
div.note,
|
||||
div.tip,
|
||||
div.important,
|
||||
div.caution,
|
||||
div.warning,
|
||||
p.blurb
|
||||
{
|
||||
background-color: #FFFFF0;
|
||||
border: 1pt solid #707070;
|
||||
border: 1px solid #DCDCDC;
|
||||
}
|
||||
|
||||
/* Table of contents */
|
||||
.toc
|
||||
{
|
||||
background-color: #F3F3F3;
|
||||
border: 1px solid #DCDCDC;
|
||||
}
|
||||
|
||||
/* Tables */
|
||||
div.informaltable table tr td,
|
||||
div.table table tr td
|
||||
{
|
||||
background-color: #F0F0F0;
|
||||
border: 1px solid #DCDCDC;
|
||||
}
|
||||
|
||||
div.informaltable table tr th,
|
||||
div.table table tr th
|
||||
{
|
||||
background-color: #E4E4E4;
|
||||
background-color: #F0F0F0;
|
||||
border: 1px solid #DCDCDC;
|
||||
}
|
||||
|
||||
/* Misc */
|
||||
@@ -396,6 +471,12 @@
|
||||
border: 1px solid gray;
|
||||
}
|
||||
|
||||
td .programlisting,
|
||||
td .screen
|
||||
{
|
||||
border: 0px solid #DCDCDC;
|
||||
}
|
||||
|
||||
/* Table of contents */
|
||||
.toc
|
||||
{
|
||||
|
||||
@@ -3,13 +3,13 @@
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
||||
<title>Chapter 1. python 1.0</title>
|
||||
<link rel="stylesheet" href="boostbook.css" type="text/css">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
|
||||
<link rel="start" href="index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="next" href="python/hello.html" title=" Building Hello World">
|
||||
<link rel="next" href="python/hello.html" title="Building Hello World">
|
||||
</head>
|
||||
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||||
<table cellpadding="2" width="100%">
|
||||
<td valign="top"><img alt="boost.png (6897 bytes)" width="277" height="86" src="../../../../../../boost.png"></td>
|
||||
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td>
|
||||
<td align="center"><a href="../../../../../../index.htm">Home</a></td>
|
||||
<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td>
|
||||
<td align="center"><a href="../../../../../../people/people.htm">People</a></td>
|
||||
@@ -31,7 +31,7 @@
|
||||
<div><p class="copyright">Copyright © 2002-2005 Joel
|
||||
de Guzman, David Abrahams</p></div>
|
||||
<div><div class="legalnotice">
|
||||
<a name="id427816"></a><p>
|
||||
<a name="id3128483"></a><p>
|
||||
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||||
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">
|
||||
http://www.boost.org/LICENSE_1_0.txt </a>)
|
||||
@@ -83,20 +83,20 @@
|
||||
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
|
||||
<a name="python.quickstart"></a>QuickStart</h2></div></div></div>
|
||||
<p>
|
||||
QuickStartThe Boost Python Library is a framework for interfacing Python and
|
||||
C++. It allows you to quickly and seamlessly expose C++ classes functions and
|
||||
objects to Python, and vice-versa, using no special tools -- just your C++
|
||||
compiler. It is designed to wrap C++ interfaces non-intrusively, so that you
|
||||
should not have to change the C++ code at all in order to wrap it, making Boost.Python
|
||||
The Boost Python Library is a framework for interfacing Python and C++. It
|
||||
allows you to quickly and seamlessly expose C++ classes functions and objects
|
||||
to Python, and vice-versa, using no special tools -- just your C++ compiler.
|
||||
It is designed to wrap C++ interfaces non-intrusively, so that you should not
|
||||
have to change the C++ code at all in order to wrap it, making Boost.Python
|
||||
ideal for exposing 3rd-party libraries to Python. The library's use of advanced
|
||||
metaprogramming techniques simplifies its syntax for users, so that wrapping
|
||||
code takes on the look of a kind of declarative interface definition language
|
||||
(IDL).
|
||||
</p>
|
||||
<a name="quickstart.hello_world"></a><h2>
|
||||
<a name="id372244"></a>
|
||||
<a name="quickstart.hello_world"></a><h3>
|
||||
<a name="id3090903"></a>
|
||||
Hello World
|
||||
</h2>
|
||||
</h3>
|
||||
<p>
|
||||
Following C/C++ tradition, let's start with the "hello, world". A
|
||||
C++ Function:
|
||||
@@ -123,19 +123,23 @@
|
||||
That's it. We're done. We can now build this as a shared library. The resulting
|
||||
DLL is now visible to Python. Here's a sample Python session:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="keyword">import</span> <span class="identifier">hello</span>
|
||||
<span class="special">>>></span> <span class="keyword">print</span> <span class="identifier">hello</span><span class="special">.</span><span class="identifier">greet</span><span class="special">()</span>
|
||||
<span class="identifier">hello</span><span class="special">,</span> <span class="identifier">world</span>
|
||||
</pre>
|
||||
<p></p>
|
||||
<div class="blockquote"><blockquote class="blockquote"><p><span class="emphasis"><em><span class="bold"><b>Next stop... Building your Hello World module
|
||||
from start to finish...</b></span></em></span></p></blockquote></div>
|
||||
<p>
|
||||
</p>
|
||||
<div class="blockquote"><blockquote class="blockquote"><p>
|
||||
<span class="emphasis"><em><span class="bold"><strong>Next stop... Building your Hello World module
|
||||
from start to finish...</strong></span></em></span>
|
||||
</p></blockquote></div>
|
||||
</div>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"><small><p>Last revised: October 31, 2005 at 18:46:06 GMT</p></small></td>
|
||||
<td align="left"><small><p>Last revised: May 18, 2007 at 15:45:45 GMT</p></small></td>
|
||||
<td align="right"><small></small></td>
|
||||
</tr></table>
|
||||
<hr>
|
||||
|
||||
@@ -3,15 +3,15 @@
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
||||
<title>Embedding</title>
|
||||
<link rel="stylesheet" href="../boostbook.css" type="text/css">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
|
||||
<link rel="start" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="up" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="prev" href="object.html" title=" Object Interface">
|
||||
<link rel="prev" href="object.html" title="Object Interface">
|
||||
<link rel="next" href="iterators.html" title="Iterators">
|
||||
</head>
|
||||
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||||
<table cellpadding="2" width="100%">
|
||||
<td valign="top"><img alt="boost.png (6897 bytes)" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td align="center"><a href="../../../../../../../index.htm">Home</a></td>
|
||||
<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td>
|
||||
<td align="center"><a href="../../../../../../../people/people.htm">People</a></td>
|
||||
@@ -27,41 +27,40 @@
|
||||
<a name="python.embedding"></a>Embedding</h2></div></div></div>
|
||||
<div class="toc"><dl><dt><span class="section"><a href="embedding.html#python.using_the_interpreter">Using the interpreter</a></span></dt></dl></div>
|
||||
<p>
|
||||
EmbeddingBy now you should know how to use Boost.Python to call your C++ code
|
||||
from Python. However, sometimes you may need to do the reverse: call Python
|
||||
code from the C++-side. This requires you to <span class="emphasis"><em>embed</em></span> the
|
||||
Python interpreter into your C++ program.
|
||||
By now you should know how to use Boost.Python to call your C++ code from Python.
|
||||
However, sometimes you may need to do the reverse: call Python code from the
|
||||
C++-side. This requires you to <span class="emphasis"><em>embed</em></span> the Python interpreter
|
||||
into your C++ program.
|
||||
</p>
|
||||
<p>
|
||||
Currently, Boost.Python does not directly support everything you'll need when
|
||||
embedding. Therefore you'll need to use the <a href="http://www.python.org/doc/current/api/api.html" target="_top">Python/C
|
||||
API</a> to fill in the gaps. However, Boost.Python already makes embedding
|
||||
a lot easier and, in a future version, it may become unnecessary to touch the
|
||||
Python/C API at all. So stay tuned... <span class="inlinemediaobject"><img src="../images/smiley.png"></span></p>
|
||||
<a name="embedding.building_embedded_programs"></a><h2>
|
||||
<a name="id457321"></a>
|
||||
Python/C API at all. So stay tuned... <span class="inlinemediaobject"><img src="../images/smiley.png" alt="smiley"></span>
|
||||
</p>
|
||||
<a name="embedding.building_embedded_programs"></a><h3>
|
||||
<a name="id3150903"></a>
|
||||
Building embedded programs
|
||||
</h2>
|
||||
</h3>
|
||||
<p>
|
||||
To be able to use embedding in your programs, they have to be linked to both
|
||||
Boost.Python's and Python's static link library.
|
||||
To be able to embed python into your programs, you have to link to both Boost.Python's
|
||||
as well as Python's own runtime library.
|
||||
</p>
|
||||
<p>
|
||||
Boost.Python's static link library comes in two variants. Both are located
|
||||
in Boost's <tt class="literal">/libs/python/build/bin-stage</tt> subdirectory. On
|
||||
Windows, the variants are called <tt class="literal">boost_python.lib</tt> (for release
|
||||
builds) and <tt class="literal">boost_python_debug.lib</tt> (for debugging). If you
|
||||
can't find the libraries, you probably haven't built Boost.Python yet. See
|
||||
<a href="../../../../building.html" target="_top">Building and Testing</a> on how to
|
||||
do this.
|
||||
Boost.Python's library comes in two variants. Both are located in Boost's
|
||||
<code class="literal">/libs/python/build/bin-stage</code> subdirectory. On Windows, the
|
||||
variants are called <code class="literal">boost_python.lib</code> (for release builds)
|
||||
and <code class="literal">boost_python_debug.lib</code> (for debugging). If you can't
|
||||
find the libraries, you probably haven't built Boost.Python yet. See <a href="../../../../building.html" target="_top">Building and Testing</a> on how to do this.
|
||||
</p>
|
||||
<p>
|
||||
Python's static link library can be found in the <tt class="literal">/libs</tt> subdirectory
|
||||
Python's library can be found in the <code class="literal">/libs</code> subdirectory
|
||||
of your Python directory. On Windows it is called pythonXY.lib where X.Y is
|
||||
your major Python version number.
|
||||
</p>
|
||||
<p>
|
||||
Additionally, Python's <tt class="literal">/include</tt> subdirectory has to be added
|
||||
Additionally, Python's <code class="literal">/include</code> subdirectory has to be added
|
||||
to your include path.
|
||||
</p>
|
||||
<p>
|
||||
@@ -82,288 +81,156 @@ exe embedded_program # name of the executable
|
||||
<library-path>$(PYTHON_LIB_PATH)
|
||||
<find-library>$(PYTHON_EMBEDDED_LIBRARY) ;
|
||||
</pre>
|
||||
<a name="embedding.getting_started"></a><h2>
|
||||
<a name="id457409"></a>
|
||||
<a name="embedding.getting_started"></a><h3>
|
||||
<a name="id3150996"></a>
|
||||
Getting started
|
||||
</h2>
|
||||
</h3>
|
||||
<p>
|
||||
Being able to build is nice, but there is nothing to build yet. Embedding the
|
||||
Python interpreter into one of your C++ programs requires these 4 steps:
|
||||
</p>
|
||||
<div class="orderedlist"><ol type="1">
|
||||
<li>
|
||||
#include <tt class="literal"><boost/python.hpp></tt><br><br>
|
||||
|
||||
#include
|
||||
<code class="literal"><boost/python.hpp></code><br><br>
|
||||
</li>
|
||||
<li>
|
||||
Call <a href="http://www.python.org/doc/current/api/initialization.html#l2h-652" target="_top">Py_Initialize</a>()
|
||||
to start the interpreter and create the <tt class="literal"><span class="underline">_main</span>_</tt>
|
||||
to start the interpreter and create the <code class="literal"><span class="underline">_main</span>_</code>
|
||||
module.<br><br>
|
||||
</li>
|
||||
<li>
|
||||
Call other Python C API routines to use the interpreter.<br><br>
|
||||
</li>
|
||||
<li>
|
||||
Call <a href="http://www.python.org/doc/current/api/initialization.html#l2h-656" target="_top">Py_Finalize</a>()
|
||||
to stop the interpreter and release its resources.
|
||||
</li>
|
||||
</ol></div>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb"> <span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> <span class="bold"><strong>Note that at this time
|
||||
you must not call <a href="http://www.python.org/doc/current/api/initialization.html#l2h-656" target="_top">Py_Finalize</a>()
|
||||
to stop the interpreter. This may be fixed in a future version of boost.python.</strong></span>
|
||||
</td></tr></tbody>
|
||||
</table></div>
|
||||
<p>
|
||||
(Of course, there can be other C++ code between all of these steps.)
|
||||
</p>
|
||||
<div class="blockquote"><blockquote class="blockquote"><p><span class="emphasis"><em><span class="bold"><b>Now that we can embed the interpreter in
|
||||
our programs, lets see how to put it to use...</b></span></em></span></p></blockquote></div>
|
||||
<div class="blockquote"><blockquote class="blockquote"><p>
|
||||
<span class="emphasis"><em><span class="bold"><strong>Now that we can embed the interpreter in
|
||||
our programs, lets see how to put it to use...</strong></span></em></span>
|
||||
</p></blockquote></div>
|
||||
<div class="section" lang="en">
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.using_the_interpreter"></a>Using the interpreter</h3></div></div></div>
|
||||
<p>
|
||||
Using the interpreterAs you probably already know, objects in Python are
|
||||
reference-counted. Naturally, the <tt class="literal">PyObject</tt>s of the Python/C
|
||||
API are also reference-counted. There is a difference however. While the
|
||||
reference-counting is fully automatic in Python, the Python/C API requires
|
||||
you to do it <a href="http://www.python.org/doc/current/api/refcounts.html" target="_top">by
|
||||
As you probably already know, objects in Python are reference-counted. Naturally,
|
||||
the <code class="literal">PyObject</code>s of the Python/C API are also reference-counted.
|
||||
There is a difference however. While the reference-counting is fully automatic
|
||||
in Python, the Python/C API requires you to do it <a href="http://www.python.org/doc/current/api/refcounts.html" target="_top">by
|
||||
hand</a>. This is messy and especially hard to get right in the presence
|
||||
of C++ exceptions. Fortunately Boost.Python provides the <a href="../../../../v2/handle.html" target="_top">handle</a>
|
||||
and <a href="../../../../v2/object.html" target="_top">object</a> class templates to
|
||||
automate the process.
|
||||
</p>
|
||||
<a name="using_the_interpreter.reference_counting_handles_and_objects"></a><h2>
|
||||
<a name="id457544"></a>
|
||||
Reference-counting handles and objects
|
||||
</h2>
|
||||
<p>
|
||||
There are two ways in which a function in the Python/C API can return a
|
||||
<tt class="literal">PyObject*</tt>: as a <span class="emphasis"><em>borrowed reference</em></span>
|
||||
or as a <span class="emphasis"><em>new reference</em></span>. Which of these a function uses,
|
||||
is listed in that function's documentation. The two require slightely different
|
||||
approaches to reference-counting but both can be 'handled' by Boost.Python.
|
||||
</p>
|
||||
<p>
|
||||
For a function returning a <span class="emphasis"><em>borrowed reference</em></span> we'll
|
||||
have to tell the <tt class="literal">handle</tt> that the <tt class="literal">PyObject*</tt>
|
||||
is borrowed with the aptly named <a href="../../../../v2/handle.html#borrowed-spec" target="_top">borrowed</a>
|
||||
function. Two functions returning borrowed references are <a href="http://www.python.org/doc/current/api/importing.html#l2h-125" target="_top">PyImport_AddModule</a>
|
||||
and <a href="http://www.python.org/doc/current/api/moduleObjects.html#l2h-594" target="_top">PyModule_GetDict</a>.
|
||||
The former returns a reference to an already imported module, the latter
|
||||
retrieves a module's namespace dictionary. Let's use them to retrieve the
|
||||
namespace of the <tt class="literal"><span class="underline">_main</span>_</tt>
|
||||
module:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">object</span> <span class="identifier">main_module</span><span class="special">((</span>
|
||||
<span class="identifier">handle</span><span class="special"><>(</span><span class="identifier">borrowed</span><span class="special">(</span><a href="http://www.python.org/doc/current/api/importing.html#l2h-125" target="_top">PyImport_AddModule</a><span class="special">(</span><span class="string">"__main__"</span><span class="special">)))));</span>
|
||||
|
||||
<span class="identifier">object</span> <span class="identifier">main_namespace</span> <span class="special">=</span> <span class="identifier">main_module</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"__dict__"</span><span class="special">);</span>
|
||||
</pre>
|
||||
<p>
|
||||
For a function returning a <span class="emphasis"><em>new reference</em></span> we can just
|
||||
create a <tt class="literal">handle</tt> out of the raw <tt class="literal">PyObject*</tt>
|
||||
without wrapping it in a call to borrowed. One such function that returns
|
||||
a new reference is <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a>
|
||||
which we'll discuss in the next section.
|
||||
</p>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/note.png"></span> <span class="bold"><b>Handle is a class <span class="emphasis"><em>template</em></span>, so why
|
||||
haven't we been using any template parameters?</b></span><br><br><tt class="literal">handle</tt> has a single template parameter specifying
|
||||
the type of the managed object. This type is <tt class="literal">PyObject</tt>
|
||||
99% of the time, so the parameter was defaulted to <tt class="literal">PyObject</tt>
|
||||
for convenience. Therefore we can use the shorthand <tt class="literal">handle<></tt>
|
||||
instead of the longer, but equivalent, <tt class="literal">handle<PyObject></tt>.
|
||||
</td></tr></tbody>
|
||||
</table></div>
|
||||
<a name="using_the_interpreter.running_python_code"></a><h2>
|
||||
<a name="id457863"></a>
|
||||
<a name="using_the_interpreter.running_python_code"></a><h3>
|
||||
<a name="id3151190"></a>
|
||||
Running Python code
|
||||
</h2>
|
||||
</h3>
|
||||
<p>
|
||||
To run Python code from C++ there is a family of functions in the API starting
|
||||
with the PyRun prefix. You can find the full list of these functions <a href="http://www.python.org/doc/current/api/veryhigh.html" target="_top">here</a>. They
|
||||
all work similarly so we will look at only one of them, namely:
|
||||
Boost.python provides three related functions to run Python code from C++.
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">PyObject</span><span class="special">*</span> <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a><span class="special">(</span><span class="keyword">char</span> <span class="special">*</span><span class="identifier">str</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">start</span><span class="special">,</span> <span class="identifier">PyObject</span> <span class="special">*</span><span class="identifier">globals</span><span class="special">,</span> <span class="identifier">PyObject</span> <span class="special">*</span><span class="identifier">locals</span><span class="special">)</span>
|
||||
<span class="identifier">object</span> <span class="identifier">eval</span><span class="special">(</span><span class="identifier">str</span> <span class="identifier">expression</span><span class="special">,</span> <span class="identifier">object</span> <span class="identifier">globals</span> <span class="special">=</span> <span class="identifier">object</span><span class="special">(),</span> <span class="identifier">object</span> <span class="identifier">locals</span> <span class="special">=</span> <span class="identifier">object</span><span class="special">())</span>
|
||||
<span class="identifier">object</span> <span class="identifier">exec</span><span class="special">(</span><span class="identifier">str</span> <span class="identifier">code</span><span class="special">,</span> <span class="identifier">object</span> <span class="identifier">globals</span> <span class="special">=</span> <span class="identifier">object</span><span class="special">(),</span> <span class="identifier">object</span> <span class="identifier">locals</span> <span class="special">=</span> <span class="identifier">object</span><span class="special">())</span>
|
||||
<span class="identifier">object</span> <span class="identifier">exec_file</span><span class="special">(</span><span class="identifier">str</span> <span class="identifier">filename</span><span class="special">,</span> <span class="identifier">object</span> <span class="identifier">globals</span> <span class="special">=</span> <span class="identifier">object</span><span class="special">(),</span> <span class="identifier">object</span> <span class="identifier">locals</span> <span class="special">=</span> <span class="identifier">object</span><span class="special">())</span>
|
||||
</pre>
|
||||
<p><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a>
|
||||
takes the code to execute as a null-terminated (C-style) string in its <tt class="literal">str</tt>
|
||||
parameter. The function returns a new reference to a Python object. Which
|
||||
object is returned depends on the <tt class="literal">start</tt> paramater.
|
||||
<p>
|
||||
eval evaluates the given expression and returns the resulting value. exec
|
||||
executes the given code (typically a set of statements) returning the result,
|
||||
and exec_file executes the code contained in the given file.
|
||||
</p>
|
||||
<p>
|
||||
The <tt class="literal">start</tt> parameter is the start symbol from the Python
|
||||
grammar to use for interpreting the code. The possible values are:
|
||||
</p>
|
||||
<div class="informaltable">
|
||||
<h4>
|
||||
<a name="id458033"></a><span class="table-title">Start symbols</span>
|
||||
</h4>
|
||||
<table class="table">
|
||||
<colgroup>
|
||||
<col>
|
||||
<col>
|
||||
</colgroup>
|
||||
<thead><tr>
|
||||
<th><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-58" target="_top">Py_eval_input</a></th>
|
||||
<th>for
|
||||
interpreting isolated expressions</th>
|
||||
</tr></thead>
|
||||
<tbody>
|
||||
<tr>
|
||||
<td><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-59" target="_top">Py_file_input</a></td>
|
||||
<td>for
|
||||
interpreting sequences of statements</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-60" target="_top">Py_single_input</a></td>
|
||||
<td>for
|
||||
interpreting a single statement</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
||||
<p>
|
||||
When using <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-58" target="_top">Py_eval_input</a>,
|
||||
the input string must contain a single expression and its result is returned.
|
||||
When using <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-59" target="_top">Py_file_input</a>,
|
||||
the string can contain an abitrary number of statements and None is returned.
|
||||
<a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-60" target="_top">Py_single_input</a>
|
||||
works in the same way as <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-59" target="_top">Py_file_input</a>
|
||||
but only accepts a single statement.
|
||||
</p>
|
||||
<p>
|
||||
Lastly, the <tt class="literal">globals</tt> and <tt class="literal">locals</tt> parameters
|
||||
are Python dictionaries containing the globals and locals of the context
|
||||
in which to run the code. For most intents and purposes you can use the namespace
|
||||
dictionary of the <tt class="literal"><span class="underline">_main</span>_</tt>
|
||||
The <code class="literal">globals</code> and <code class="literal">locals</code> parameters are
|
||||
Python dictionaries containing the globals and locals of the context in which
|
||||
to run the code. For most intents and purposes you can use the namespace
|
||||
dictionary of the <code class="literal"><span class="underline">_main</span>_</code>
|
||||
module for both parameters.
|
||||
</p>
|
||||
<p>
|
||||
We have already seen how to get the <tt class="literal"><span class="underline">_main</span>_</tt>
|
||||
module's namespace so let's run some Python code in it:
|
||||
Boost.python provides a function to import a module:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">object</span> <span class="identifier">main_module</span><span class="special">((</span>
|
||||
<span class="identifier">handle</span><span class="special"><>(</span><span class="identifier">borrowed</span><span class="special">(</span><a href="http://www.python.org/doc/current/api/importing.html#l2h-125" target="_top">PyImport_AddModule</a><span class="special">(</span><span class="string">"__main__"</span><span class="special">)))));</span>
|
||||
|
||||
<span class="identifier">object</span> <span class="identifier">main_namespace</span> <span class="special">=</span> <span class="identifier">main_module</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"__dict__"</span><span class="special">);</span>
|
||||
|
||||
<span class="identifier">handle</span><span class="special"><></span> <span class="identifier">ignored</span><span class="special">((</span><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a><span class="special">(</span>
|
||||
|
||||
<span class="string">"hello = file('hello.txt', 'w')\n"</span>
|
||||
<span class="string">"hello.write('Hello world!')\n"</span>
|
||||
<span class="string">"hello.close()"</span>
|
||||
|
||||
<span class="special">,</span> <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-59" target="_top">Py_file_input</a>
|
||||
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()</span>
|
||||
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">())</span>
|
||||
<span class="special">));</span>
|
||||
<span class="identifier">object</span> <span class="identifier">import</span><span class="special">(</span><span class="identifier">str</span> <span class="identifier">name</span><span class="special">)</span>
|
||||
</pre>
|
||||
<p>
|
||||
Because the Python/C API doesn't know anything about <tt class="literal">object</tt>s,
|
||||
we used the object's <tt class="literal">ptr</tt> member function to retrieve the
|
||||
<tt class="literal">PyObject*</tt>.
|
||||
import imports a python module (potentially loading it into the running process
|
||||
first), and returns it.
|
||||
</p>
|
||||
<p>
|
||||
Let's import the <code class="literal"><span class="underline">_main</span>_</code>
|
||||
module and run some Python code in its namespace:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">object</span> <span class="identifier">main_module</span> <span class="special">=</span> <span class="identifier">import</span><span class="special">(</span><span class="string">"__main__"</span><span class="special">);</span>
|
||||
<span class="identifier">object</span> <span class="identifier">main_namespace</span> <span class="special">=</span> <span class="identifier">main_module</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"__dict__"</span><span class="special">);</span>
|
||||
|
||||
<span class="identifier">object</span> <span class="identifier">ignored</span> <span class="special">=</span> <span class="identifier">exec</span><span class="special">(</span><span class="string">"hello = file('hello.txt', 'w')\n"</span>
|
||||
<span class="string">"hello.write('Hello world!')\n"</span>
|
||||
<span class="string">"hello.close()"</span><span class="special">,</span>
|
||||
<span class="identifier">main_namespace</span><span class="special">);</span>
|
||||
</pre>
|
||||
<p>
|
||||
This should create a file called 'hello.txt' in the current directory containing
|
||||
a phrase that is well-known in programming circles.
|
||||
</p>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/note.png"></span> <span class="bold"><b>Note</b></span> that we wrap the return value of <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a>
|
||||
in a (nameless) <tt class="literal">handle</tt> even though we are not interested
|
||||
in it. If we didn't do this, the the returned object would be kept
|
||||
alive unnecessarily. Unless you want to be a Dr. Frankenstein, always
|
||||
wrap <tt class="literal">PyObject*</tt>s in <tt class="literal">handle</tt>s.
|
||||
</td></tr></tbody>
|
||||
</table></div>
|
||||
<a name="using_the_interpreter.beyond_handles"></a><h2>
|
||||
<a name="id458506"></a>
|
||||
Beyond handles
|
||||
</h2>
|
||||
<a name="using_the_interpreter.manipulating_python_objects"></a><h3>
|
||||
<a name="id3151717"></a>
|
||||
Manipulating Python objects
|
||||
</h3>
|
||||
<p>
|
||||
It's nice that <tt class="literal">handle</tt> manages the reference counting details
|
||||
for us, but other than that it doesn't do much. Often we'd like to have a
|
||||
more useful class to manipulate Python objects. But we have already seen
|
||||
such a class above, and in the <a href="object.html" target="_top">previous section</a>:
|
||||
the aptly named <tt class="literal">object</tt> class and it's derivatives. We've
|
||||
already seen that they can be constructed from a <tt class="literal">handle</tt>.
|
||||
Often we'd like to have a class to manipulate Python objects. But we have
|
||||
already seen such a class above, and in the <a href="object.html" target="_top">previous
|
||||
section</a>: the aptly named <code class="literal">object</code> class and its
|
||||
derivatives. We've already seen that they can be constructed from a <code class="literal">handle</code>.
|
||||
The following examples should further illustrate this fact:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">object</span> <span class="identifier">main_module</span><span class="special">((</span>
|
||||
<span class="identifier">handle</span><span class="special"><>(</span><span class="identifier">borrowed</span><span class="special">(</span><a href="http://www.python.org/doc/current/api/importing.html#l2h-125" target="_top">PyImport_AddModule</a><span class="special">(</span><span class="string">"__main__"</span><span class="special">)))));</span>
|
||||
|
||||
<span class="identifier">object</span> <span class="identifier">main_module</span> <span class="special">=</span> <span class="identifier">import</span><span class="special">(</span><span class="string">"__main__"</span><span class="special">);</span>
|
||||
<span class="identifier">object</span> <span class="identifier">main_namespace</span> <span class="special">=</span> <span class="identifier">main_module</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"__dict__"</span><span class="special">);</span>
|
||||
|
||||
<span class="identifier">handle</span><span class="special"><></span> <span class="identifier">ignored</span><span class="special">((</span><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a><span class="special">(</span>
|
||||
|
||||
<span class="string">"result = 5 ** 2"</span>
|
||||
|
||||
<span class="special">,</span> <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-59" target="_top">Py_file_input</a>
|
||||
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()</span>
|
||||
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">())</span>
|
||||
<span class="special">));</span>
|
||||
|
||||
<span class="identifier">object</span> <span class="identifier">ignored</span> <span class="special">=</span> <span class="identifier">exec</span><span class="special">(</span><span class="string">"result = 5 ** 2"</span><span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">);</span>
|
||||
<span class="keyword">int</span> <span class="identifier">five_squared</span> <span class="special">=</span> <span class="identifier">extract</span><span class="special"><</span><span class="keyword">int</span><span class="special">>(</span><span class="identifier">main_namespace</span><span class="special">[</span><span class="string">"result"</span><span class="special">]);</span>
|
||||
</pre>
|
||||
<p>
|
||||
Here we create a dictionary object for the <tt class="literal"><span class="underline">_main</span>_</tt>
|
||||
Here we create a dictionary object for the <code class="literal"><span class="underline">_main</span>_</code>
|
||||
module's namespace. Then we assign 5 squared to the result variable and read
|
||||
this variable from the dictionary. Another way to achieve the same result
|
||||
is to let <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a>
|
||||
return the result directly with <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-58" target="_top">Py_eval_input</a>:
|
||||
is to use eval instead, which returns the result directly:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">object</span> <span class="identifier">result</span><span class="special">((</span><span class="identifier">handle</span><span class="special"><>(</span>
|
||||
<a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a><span class="special">(</span><span class="string">"5 ** 2"</span>
|
||||
<span class="special">,</span> <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-58" target="_top">Py_eval_input</a>
|
||||
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()</span>
|
||||
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()))</span>
|
||||
<span class="special">));</span>
|
||||
|
||||
<span class="identifier">object</span> <span class="identifier">result</span> <span class="special">=</span> <span class="identifier">eval</span><span class="special">(</span><span class="string">"5 ** 2"</span><span class="special">);</span>
|
||||
<span class="keyword">int</span> <span class="identifier">five_squared</span> <span class="special">=</span> <span class="identifier">extract</span><span class="special"><</span><span class="keyword">int</span><span class="special">>(</span><span class="identifier">result</span><span class="special">);</span>
|
||||
</pre>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/note.png"></span> <span class="bold"><b>Note</b></span> that <tt class="literal">object</tt>'s member
|
||||
function to return the wrapped <tt class="literal">PyObject*</tt> is called
|
||||
<tt class="literal">ptr</tt> instead of <tt class="literal">get</tt>. This makes
|
||||
sense if you take into account the different functions that <tt class="literal">object</tt>
|
||||
and <tt class="literal">handle</tt> perform. </td></tr></tbody>
|
||||
</table></div>
|
||||
<a name="using_the_interpreter.exception_handling"></a><h2>
|
||||
<a name="id459120"></a>
|
||||
<a name="using_the_interpreter.exception_handling"></a><h3>
|
||||
<a name="id3152050"></a>
|
||||
Exception handling
|
||||
</h2>
|
||||
</h3>
|
||||
<p>
|
||||
If an exception occurs in the execution of some Python code, the <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a>
|
||||
function returns a null pointer. Constructing a <tt class="literal">handle</tt>
|
||||
out of this null pointer throws <a href="../../../../v2/errors.html#error_already_set-spec" target="_top">error_already_set</a>,
|
||||
so basically, the Python exception is automatically translated into a C++
|
||||
exception when using <tt class="literal">handle</tt>:
|
||||
If an exception occurs in the evaluation of the python expression, <a href="../../../../v2/errors.html#error_already_set-spec" target="_top">error_already_set</a>
|
||||
is thrown:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">try</span>
|
||||
<span class="special">{</span>
|
||||
<span class="identifier">object</span> <span class="identifier">result</span><span class="special">((</span><span class="identifier">handle</span><span class="special"><>(</span><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a><span class="special">(</span>
|
||||
<span class="string">"5/0"</span>
|
||||
<span class="special">,</span> <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-58" target="_top">Py_eval_input</a>
|
||||
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()</span>
|
||||
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()))</span>
|
||||
<span class="special">));</span>
|
||||
|
||||
<span class="identifier">object</span> <span class="identifier">result</span> <span class="special">=</span> <span class="identifier">eval</span><span class="special">(</span><span class="string">"5/0"</span><span class="special">);</span>
|
||||
<span class="comment">// execution will never get here:
|
||||
</span> <span class="keyword">int</span> <span class="identifier">five_divided_by_zero</span> <span class="special">=</span> <span class="identifier">extract</span><span class="special"><</span><span class="keyword">int</span><span class="special">>(</span><span class="identifier">result</span><span class="special">);</span>
|
||||
<span class="special">}</span>
|
||||
<span class="keyword">catch</span><span class="special">(</span><span class="identifier">error_already_set</span><span class="special">)</span>
|
||||
<span class="keyword">catch</span><span class="special">(</span><span class="identifier">error_already_set</span> <span class="keyword">const</span> <span class="special">&)</span>
|
||||
<span class="special">{</span>
|
||||
<span class="comment">// handle the exception in some way
|
||||
</span><span class="special">}</span>
|
||||
</pre>
|
||||
<p>
|
||||
The <tt class="literal">error_already_set</tt> exception class doesn't carry any
|
||||
The <code class="literal">error_already_set</code> exception class doesn't carry any
|
||||
information in itself. To find out more about the Python exception that occurred,
|
||||
you need to use the <a href="http://www.python.org/doc/api/exceptionHandling.html" target="_top">exception
|
||||
handling functions</a> of the Python/C API in your catch-statement. This
|
||||
@@ -373,7 +240,7 @@ exe embedded_program # name of the executable
|
||||
exceptions</a>:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">catch</span><span class="special">(</span><span class="identifier">error_already_set</span><span class="special">)</span>
|
||||
<span class="keyword">catch</span><span class="special">(</span><span class="identifier">error_already_set</span> <span class="keyword">const</span> <span class="special">&)</span>
|
||||
<span class="special">{</span>
|
||||
<span class="keyword">if</span> <span class="special">(</span><span class="identifier">PyErr_ExceptionMatches</span><span class="special">(</span><span class="identifier">PyExc_ZeroDivisionError</span><span class="special">))</span>
|
||||
<span class="special">{</span>
|
||||
@@ -390,23 +257,6 @@ exe embedded_program # name of the executable
|
||||
(To retrieve even more information from the exception you can use some of
|
||||
the other exception handling functions listed <a href="http://www.python.org/doc/api/exceptionHandling.html" target="_top">here</a>.)
|
||||
</p>
|
||||
<p>
|
||||
If you'd rather not have <tt class="literal">handle</tt> throw a C++ exception
|
||||
when it is constructed, you can use the <a href="../../../../v2/handle.html#allow_null-spec" target="_top">allow_null</a>
|
||||
function in the same way you'd use borrowed:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">handle</span><span class="special"><></span> <span class="identifier">result</span><span class="special">((</span><span class="identifier">allow_null</span><span class="special">(</span><a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-55" target="_top">PyRun_String</a><span class="special">(</span>
|
||||
<span class="string">"5/0"</span>
|
||||
<span class="special">,</span> <a href="http://www.python.org/doc/current/api/veryhigh.html#l2h-58" target="_top">Py_eval_input</a>
|
||||
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()</span>
|
||||
<span class="special">,</span> <span class="identifier">main_namespace</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">()))));</span>
|
||||
|
||||
<span class="keyword">if</span> <span class="special">(!</span><span class="identifier">result</span><span class="special">)</span>
|
||||
<span class="comment">// Python exception occurred
|
||||
</span><span class="keyword">else</span>
|
||||
<span class="comment">// everything went okay, it's safe to use the result
|
||||
</span></pre>
|
||||
</div>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
|
||||
@@ -1,17 +1,17 @@
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
||||
<title> Exception Translation</title>
|
||||
<title>Exception Translation</title>
|
||||
<link rel="stylesheet" href="../boostbook.css" type="text/css">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
|
||||
<link rel="start" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="up" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="prev" href="iterators.html" title="Iterators">
|
||||
<link rel="next" href="techniques.html" title=" General Techniques">
|
||||
<link rel="next" href="techniques.html" title="General Techniques">
|
||||
</head>
|
||||
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||||
<table cellpadding="2" width="100%">
|
||||
<td valign="top"><img alt="boost.png (6897 bytes)" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td align="center"><a href="../../../../../../../index.htm">Home</a></td>
|
||||
<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td>
|
||||
<td align="center"><a href="../../../../../../../people/people.htm">People</a></td>
|
||||
@@ -26,10 +26,9 @@
|
||||
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
|
||||
<a name="python.exception"></a> Exception Translation</h2></div></div></div>
|
||||
<p>
|
||||
Exception TranslationAll C++ exceptions must be caught at the boundary with
|
||||
Python code. This boundary is the point where C++ meets Python. Boost.Python
|
||||
provides a default exception handler that translates selected standard exceptions,
|
||||
then gives up:
|
||||
All C++ exceptions must be caught at the boundary with Python code. This boundary
|
||||
is the point where C++ meets Python. Boost.Python provides a default exception
|
||||
handler that translates selected standard exceptions, then gives up:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">raise</span> <span class="identifier">RuntimeError</span><span class="special">,</span> <span class="string">'unidentifiable C++ Exception'</span>
|
||||
|
||||
@@ -1,17 +1,17 @@
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
||||
<title> Exposing Classes</title>
|
||||
<title>Exposing Classes</title>
|
||||
<link rel="stylesheet" href="../boostbook.css" type="text/css">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
|
||||
<link rel="start" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="up" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="prev" href="hello.html" title=" Building Hello World">
|
||||
<link rel="prev" href="hello.html" title="Building Hello World">
|
||||
<link rel="next" href="functions.html" title="Functions">
|
||||
</head>
|
||||
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||||
<table cellpadding="2" width="100%">
|
||||
<td valign="top"><img alt="boost.png (6897 bytes)" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td align="center"><a href="../../../../../../../index.htm">Home</a></td>
|
||||
<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td>
|
||||
<td align="center"><a href="../../../../../../../people/people.htm">People</a></td>
|
||||
@@ -35,7 +35,7 @@
|
||||
<dt><span class="section"><a href="exposing.html#python.class_operators_special_functions">Class Operators/Special Functions</a></span></dt>
|
||||
</dl></div>
|
||||
<p>
|
||||
Exposing ClassesNow let's expose a C++ class to Python.
|
||||
Now let's expose a C++ class to Python.
|
||||
</p>
|
||||
<p>
|
||||
Consider a C++ class/struct that we want to expose to Python:
|
||||
@@ -64,12 +64,13 @@
|
||||
<span class="special">}</span>
|
||||
</pre>
|
||||
<p>
|
||||
Here, we wrote a C++ class wrapper that exposes the member functions <tt class="literal">greet</tt>
|
||||
and <tt class="literal">set</tt>. Now, after building our module as a shared library,
|
||||
we may use our class <tt class="literal">World</tt> in Python. Here's a sample Python
|
||||
Here, we wrote a C++ class wrapper that exposes the member functions <code class="literal">greet</code>
|
||||
and <code class="literal">set</code>. Now, after building our module as a shared library,
|
||||
we may use our class <code class="literal">World</code> in Python. Here's a sample Python
|
||||
session:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="keyword">import</span> <span class="identifier">hello</span>
|
||||
<span class="special">>>></span> <span class="identifier">planet</span> <span class="special">=</span> <span class="identifier">hello</span><span class="special">.</span><span class="identifier">World</span><span class="special">()</span>
|
||||
@@ -81,10 +82,10 @@
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.constructors"></a>Constructors</h3></div></div></div>
|
||||
<p>
|
||||
ConstructorsOur previous example didn't have any explicit constructors. Since
|
||||
<tt class="literal">World</tt> is declared as a plain struct, it has an implicit
|
||||
default constructor. Boost.Python exposes the default constructor by default,
|
||||
which is why we were able to write
|
||||
Our previous example didn't have any explicit constructors. Since <code class="literal">World</code>
|
||||
is declared as a plain struct, it has an implicit default constructor. Boost.Python
|
||||
exposes the default constructor by default, which is why we were able to
|
||||
write
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="identifier">planet</span> <span class="special">=</span> <span class="identifier">hello</span><span class="special">.</span><span class="identifier">World</span><span class="special">()</span>
|
||||
@@ -93,7 +94,8 @@
|
||||
We may wish to wrap a class with a non-default constructor. Let us build
|
||||
on our previous example:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">struct</span> <span class="identifier">World</span>
|
||||
<span class="special">{</span>
|
||||
@@ -104,9 +106,9 @@
|
||||
<span class="special">};</span>
|
||||
</pre>
|
||||
<p>
|
||||
This time <tt class="literal">World</tt> has no default constructor; our previous
|
||||
This time <code class="literal">World</code> has no default constructor; our previous
|
||||
wrapping code would fail to compile when the library tried to expose it.
|
||||
We have to tell <tt class="literal">class_<World></tt> about the constructor
|
||||
We have to tell <code class="literal">class_<World></code> about the constructor
|
||||
we want to expose instead.
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
@@ -121,13 +123,14 @@
|
||||
<span class="special">;</span>
|
||||
<span class="special">}</span>
|
||||
</pre>
|
||||
<p><tt class="literal">init<std::string>()</tt> exposes the constructor taking
|
||||
in a <tt class="literal">std::string</tt> (in Python, constructors are spelled
|
||||
"<tt class="literal">"<span class="underline">_init</span>_"</tt>").
|
||||
<p>
|
||||
<code class="literal">init<std::string>()</code> exposes the constructor taking
|
||||
in a <code class="literal">std::string</code> (in Python, constructors are spelled
|
||||
"<code class="literal">"<span class="underline">_init</span>_"</code>").
|
||||
</p>
|
||||
<p>
|
||||
We can expose additional constructors by passing more <tt class="literal">init<...></tt>s
|
||||
to the <tt class="literal">def()</tt> member function. Say for example we have
|
||||
We can expose additional constructors by passing more <code class="literal">init<...></code>s
|
||||
to the <code class="literal">def()</code> member function. Say for example we have
|
||||
another World constructor taking in two doubles:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
@@ -139,13 +142,13 @@
|
||||
</pre>
|
||||
<p>
|
||||
On the other hand, if we do not wish to expose any constructors at all, we
|
||||
may use <tt class="literal">no_init</tt> instead:
|
||||
may use <code class="literal">no_init</code> instead:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">class_</span><span class="special"><</span><span class="identifier">Abstract</span><span class="special">>(</span><span class="string">"Abstract"</span><span class="special">,</span> <span class="identifier">no_init</span><span class="special">)</span>
|
||||
</pre>
|
||||
<p>
|
||||
This actually adds an <tt class="literal"><span class="underline">_init</span>_</tt>
|
||||
This actually adds an <code class="literal"><span class="underline">_init</span>_</code>
|
||||
method which always raises a Python RuntimeError exception.
|
||||
</p>
|
||||
</div>
|
||||
@@ -153,10 +156,10 @@
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.class_data_members"></a>Class Data Members</h3></div></div></div>
|
||||
<p>
|
||||
Class Data MembersData members may also be exposed to Python so that they
|
||||
can be accessed as attributes of the corresponding Python class. Each data
|
||||
member that we wish to be exposed may be regarded as <span class="bold"><b>read-only</b></span>
|
||||
or <span class="bold"><b>read-write</b></span>. Consider this class <tt class="literal">Var</tt>:
|
||||
Data members may also be exposed to Python so that they can be accessed as
|
||||
attributes of the corresponding Python class. Each data member that we wish
|
||||
to be exposed may be regarded as <span class="bold"><strong>read-only</strong></span>
|
||||
or <span class="bold"><strong>read-write</strong></span>. Consider this class <code class="literal">Var</code>:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">struct</span> <span class="identifier">Var</span>
|
||||
@@ -167,7 +170,7 @@
|
||||
<span class="special">};</span>
|
||||
</pre>
|
||||
<p>
|
||||
Our C++ <tt class="literal">Var</tt> class and its data members can be exposed
|
||||
Our C++ <code class="literal">Var</code> class and its data members can be exposed
|
||||
to Python:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
@@ -179,7 +182,8 @@
|
||||
Then, in Python, assuming we have placed our Var class inside the namespace
|
||||
hello as we did before:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="identifier">x</span> <span class="special">=</span> <span class="identifier">hello</span><span class="special">.</span><span class="identifier">Var</span><span class="special">(</span><span class="string">'pi'</span><span class="special">)</span>
|
||||
<span class="special">>>></span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">value</span> <span class="special">=</span> <span class="number">3.14</span>
|
||||
@@ -187,8 +191,8 @@
|
||||
<span class="identifier">pi</span> <span class="keyword">is</span> <span class="identifier">around</span> <span class="number">3.14</span>
|
||||
</pre>
|
||||
<p>
|
||||
Note that <tt class="literal">name</tt> is exposed as <span class="bold"><b>read-only</b></span>
|
||||
while <tt class="literal">value</tt> is exposed as <span class="bold"><b>read-write</b></span>.
|
||||
Note that <code class="literal">name</code> is exposed as <span class="bold"><strong>read-only</strong></span>
|
||||
while <code class="literal">value</code> is exposed as <span class="bold"><strong>read-write</strong></span>.
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">name</span> <span class="special">=</span> <span class="string">'e'</span> <span class="comment"># can't change name
|
||||
@@ -201,13 +205,13 @@
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.class_properties"></a>Class Properties</h3></div></div></div>
|
||||
<p>
|
||||
Class PropertiesIn C++, classes with public data members are usually frowned
|
||||
upon. Well designed classes that take advantage of encapsulation hide the
|
||||
class' data members. The only way to access the class' data is through access
|
||||
(getter/setter) functions. Access functions expose class properties. Here's
|
||||
an example:
|
||||
In C++, classes with public data members are usually frowned upon. Well designed
|
||||
classes that take advantage of encapsulation hide the class' data members.
|
||||
The only way to access the class' data is through access (getter/setter)
|
||||
functions. Access functions expose class properties. Here's an example:
|
||||
</p>
|
||||
<p>
|
||||
</p>
|
||||
<p></p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">struct</span> <span class="identifier">Num</span>
|
||||
<span class="special">{</span>
|
||||
@@ -220,7 +224,7 @@
|
||||
<p>
|
||||
However, in Python attribute access is fine; it doesn't neccessarily break
|
||||
encapsulation to let users handle attributes directly, because the attributes
|
||||
can just be a different syntax for a method call. Wrapping our <tt class="literal">Num</tt>
|
||||
can just be a different syntax for a method call. Wrapping our <code class="literal">Num</code>
|
||||
class using Boost.Python:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
@@ -231,7 +235,8 @@
|
||||
<p>
|
||||
And at last, in Python:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="identifier">x</span> <span class="special">=</span> <span class="identifier">Num</span><span class="special">()</span>
|
||||
<span class="special">>>></span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">value</span> <span class="special">=</span> <span class="number">3.14</span>
|
||||
@@ -240,11 +245,12 @@
|
||||
<span class="special">>>></span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">rovalue</span> <span class="special">=</span> <span class="number">2.17</span> <span class="comment"># error!
|
||||
</span></pre>
|
||||
<p>
|
||||
Take note that the class property <tt class="literal">rovalue</tt> is exposed as
|
||||
<span class="bold"><b>read-only</b></span> since the <tt class="literal">rovalue</tt>
|
||||
Take note that the class property <code class="literal">rovalue</code> is exposed as
|
||||
<span class="bold"><strong>read-only</strong></span> since the <code class="literal">rovalue</code>
|
||||
setter member function is not passed in:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">.</span><span class="identifier">add_property</span><span class="special">(</span><span class="string">"rovalue"</span><span class="special">,</span> <span class="special">&</span><span class="identifier">Num</span><span class="special">::</span><span class="identifier">get</span><span class="special">)</span>
|
||||
</pre>
|
||||
@@ -253,7 +259,7 @@
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.inheritance"></a>Inheritance</h3></div></div></div>
|
||||
<p>
|
||||
InheritanceIn the previous examples, we dealt with classes that are not polymorphic.
|
||||
In the previous examples, we dealt with classes that are not polymorphic.
|
||||
This is not often the case. Much of the time, we will be wrapping polymorphic
|
||||
classes and class hierarchies related by inheritance. We will often have
|
||||
to write Boost.Python wrappers for classes that are derived from abstract
|
||||
@@ -267,7 +273,7 @@
|
||||
<span class="keyword">struct</span> <span class="identifier">Derived</span> <span class="special">:</span> <span class="identifier">Base</span> <span class="special">{};</span>
|
||||
</pre>
|
||||
<p>
|
||||
And a set of C++ functions operating on <tt class="literal">Base</tt> and <tt class="literal">Derived</tt>
|
||||
And a set of C++ functions operating on <code class="literal">Base</code> and <code class="literal">Derived</code>
|
||||
object instances:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
@@ -276,7 +282,7 @@
|
||||
<span class="identifier">Base</span><span class="special">*</span> <span class="identifier">factory</span><span class="special">()</span> <span class="special">{</span> <span class="keyword">return</span> <span class="keyword">new</span> <span class="identifier">Derived</span><span class="special">;</span> <span class="special">}</span>
|
||||
</pre>
|
||||
<p>
|
||||
We've seen how we can wrap the base class <tt class="literal">Base</tt>:
|
||||
We've seen how we can wrap the base class <code class="literal">Base</code>:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">class_</span><span class="special"><</span><span class="identifier">Base</span><span class="special">>(</span><span class="string">"Base"</span><span class="special">)</span>
|
||||
@@ -284,8 +290,8 @@
|
||||
<span class="special">;</span>
|
||||
</pre>
|
||||
<p>
|
||||
Now we can inform Boost.Python of the inheritance relationship between <tt class="literal">Derived</tt>
|
||||
and its base class <tt class="literal">Base</tt>. Thus:
|
||||
Now we can inform Boost.Python of the inheritance relationship between <code class="literal">Derived</code>
|
||||
and its base class <code class="literal">Base</code>. Thus:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">class_</span><span class="special"><</span><span class="identifier">Derived</span><span class="special">,</span> <span class="identifier">bases</span><span class="special"><</span><span class="identifier">Base</span><span class="special">></span> <span class="special">>(</span><span class="string">"Derived"</span><span class="special">)</span>
|
||||
@@ -301,15 +307,15 @@
|
||||
member functions)
|
||||
</li>
|
||||
<li>
|
||||
<span class="bold"><b>If</b></span> Base is polymorphic, <tt class="literal">Derived</tt>
|
||||
<span class="bold"><strong>If</strong></span> Base is polymorphic, <code class="literal">Derived</code>
|
||||
objects which have been passed to Python via a pointer or reference to
|
||||
<tt class="literal">Base</tt> can be passed where a pointer or reference to
|
||||
<tt class="literal">Derived</tt> is expected.
|
||||
<code class="literal">Base</code> can be passed where a pointer or reference to
|
||||
<code class="literal">Derived</code> is expected.
|
||||
</li>
|
||||
</ol></div>
|
||||
<p>
|
||||
Now, we shall expose the C++ free functions <tt class="literal">b</tt> and <tt class="literal">d</tt>
|
||||
and <tt class="literal">factory</tt>:
|
||||
Now, we shall expose the C++ free functions <code class="literal">b</code> and <code class="literal">d</code>
|
||||
and <code class="literal">factory</code>:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">def</span><span class="special">(</span><span class="string">"b"</span><span class="special">,</span> <span class="identifier">b</span><span class="special">);</span>
|
||||
@@ -317,11 +323,11 @@
|
||||
<span class="identifier">def</span><span class="special">(</span><span class="string">"factory"</span><span class="special">,</span> <span class="identifier">factory</span><span class="special">);</span>
|
||||
</pre>
|
||||
<p>
|
||||
Note that free function <tt class="literal">factory</tt> is being used to generate
|
||||
new instances of class <tt class="literal">Derived</tt>. In such cases, we use
|
||||
<tt class="literal">return_value_policy<manage_new_object></tt> to instruct
|
||||
Python to adopt the pointer to <tt class="literal">Base</tt> and hold the instance
|
||||
in a new Python <tt class="literal">Base</tt> object until the the Python object
|
||||
Note that free function <code class="literal">factory</code> is being used to generate
|
||||
new instances of class <code class="literal">Derived</code>. In such cases, we use
|
||||
<code class="literal">return_value_policy<manage_new_object></code> to instruct
|
||||
Python to adopt the pointer to <code class="literal">Base</code> and hold the instance
|
||||
in a new Python <code class="literal">Base</code> object until the the Python object
|
||||
is destroyed. We shall see more of Boost.Python <a href="functions.html#python.call_policies" title="Call Policies">call
|
||||
policies</a> later.
|
||||
</p>
|
||||
@@ -335,9 +341,9 @@
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.class_virtual_functions"></a>Class Virtual Functions</h3></div></div></div>
|
||||
<p>
|
||||
Class Virtual FunctionsIn this section, we shall learn how to make functions
|
||||
behave polymorphically through virtual functions. Continuing our example,
|
||||
let us add a virtual function to our <tt class="literal">Base</tt> class:
|
||||
In this section, we shall learn how to make functions behave polymorphically
|
||||
through virtual functions. Continuing our example, let us add a virtual function
|
||||
to our <code class="literal">Base</code> class:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">struct</span> <span class="identifier">Base</span>
|
||||
@@ -350,11 +356,11 @@
|
||||
One of the goals of Boost.Python is to be minimally intrusive on an existing
|
||||
C++ design. In principle, it should be possible to expose the interface for
|
||||
a 3rd party library without changing it. It is not ideal to add anything
|
||||
to our class <tt class="computeroutput"><span class="identifier">Base</span></tt>. Yet, when
|
||||
to our class <code class="computeroutput"><span class="identifier">Base</span></code>. Yet, when
|
||||
you have a virtual function that's going to be overridden in Python and called
|
||||
polymorphically <span class="bold"><b>from C++</b></span>, we'll need to
|
||||
polymorphically <span class="bold"><strong>from C++</strong></span>, we'll need to
|
||||
add some scaffoldings to make things work properly. What we'll do is write
|
||||
a class wrapper that derives from <tt class="computeroutput"><span class="identifier">Base</span></tt>
|
||||
a class wrapper that derives from <code class="computeroutput"><span class="identifier">Base</span></code>
|
||||
that will unintrusively hook into the virtual functions so that a Python
|
||||
override may be called:
|
||||
</p>
|
||||
@@ -368,40 +374,41 @@
|
||||
<span class="special">};</span>
|
||||
</pre>
|
||||
<p>
|
||||
Notice too that in addition to inheriting from <tt class="computeroutput"><span class="identifier">Base</span></tt>,
|
||||
we also multiply- inherited <tt class="computeroutput"><span class="identifier">wrapper</span><span class="special"><</span><span class="identifier">Base</span><span class="special">></span></tt> (See <a href="../../../../v2/wrapper.html" target="_top">Wrapper</a>).
|
||||
The <tt class="computeroutput"><span class="identifier">wrapper</span></tt> template makes
|
||||
Notice too that in addition to inheriting from <code class="computeroutput"><span class="identifier">Base</span></code>,
|
||||
we also multiply- inherited <code class="computeroutput"><span class="identifier">wrapper</span><span class="special"><</span><span class="identifier">Base</span><span class="special">></span></code> (See <a href="../../../../v2/wrapper.html" target="_top">Wrapper</a>).
|
||||
The <code class="computeroutput"><span class="identifier">wrapper</span></code> template makes
|
||||
the job of wrapping classes that are meant to overridden in Python, easier.
|
||||
</p>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/alert.png"></span> <span class="bold"><b>MSVC6/7 Workaround</b></span><br><br> If you are using
|
||||
Microsoft Visual C++ 6 or 7, you have to write <tt class="computeroutput"><span class="identifier">f</span></tt>
|
||||
as:<br><br><tt class="computeroutput"><span class="keyword">return</span> <span class="identifier">call</span><span class="special"><</span><span class="keyword">int</span><span class="special">>(</span><span class="keyword">this</span><span class="special">-></span><span class="identifier">get_override</span><span class="special">(</span><span class="string">"f"</span><span class="special">).</span><span class="identifier">ptr</span><span class="special">());</span></tt>.</td></tr></tbody>
|
||||
<tbody><tr><td class="blurb"> <span class="inlinemediaobject"><img src="../images/alert.png" alt="alert"></span> <span class="bold"><strong>MSVC6/7 Workaround</strong></span><br>
|
||||
<br> If you are using Microsoft Visual C++ 6 or 7, you have to write
|
||||
<code class="computeroutput"><span class="identifier">f</span></code> as:<br> <br>
|
||||
<code class="computeroutput"><span class="keyword">return</span> <span class="identifier">call</span><span class="special"><</span><span class="keyword">int</span><span class="special">>(</span><span class="keyword">this</span><span class="special">-></span><span class="identifier">get_override</span><span class="special">(</span><span class="string">"f"</span><span class="special">).</span><span class="identifier">ptr</span><span class="special">());</span></code>.</td></tr></tbody>
|
||||
</table></div>
|
||||
<p>
|
||||
BaseWrap's overridden virtual member function <tt class="computeroutput"><span class="identifier">f</span></tt>
|
||||
in effect calls the corresponding method of the Python object through <tt class="computeroutput"><span class="identifier">get_override</span></tt>.
|
||||
BaseWrap's overridden virtual member function <code class="computeroutput"><span class="identifier">f</span></code>
|
||||
in effect calls the corresponding method of the Python object through <code class="computeroutput"><span class="identifier">get_override</span></code>.
|
||||
</p>
|
||||
<p>
|
||||
Finally, exposing <tt class="computeroutput"><span class="identifier">Base</span></tt>:
|
||||
Finally, exposing <code class="computeroutput"><span class="identifier">Base</span></code>:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">class_</span><span class="special"><</span><span class="identifier">BaseWrap</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">noncopyable</span><span class="special">>(</span><span class="string">"Base"</span><span class="special">)</span>
|
||||
<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"f"</span><span class="special">,</span> <span class="identifier">pure_virtual</span><span class="special">(&</span><span class="identifier">Base</span><span class="special">::</span><span class="identifier">f</span><span class="special">))</span>
|
||||
<span class="special">;</span>
|
||||
</pre>
|
||||
<p><tt class="computeroutput"><span class="identifier">pure_virtual</span></tt> signals Boost.Python
|
||||
that the function <tt class="computeroutput"><span class="identifier">f</span></tt> is a
|
||||
<p>
|
||||
<code class="computeroutput"><span class="identifier">pure_virtual</span></code> signals Boost.Python
|
||||
that the function <code class="computeroutput"><span class="identifier">f</span></code> is a
|
||||
pure virtual function.
|
||||
</p>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/note.png"></span> <span class="bold"><b>member function and methods</b></span><br><br> Python,
|
||||
like many object oriented languages uses the term <span class="bold"><b>methods</b></span>.
|
||||
Methods correspond roughly to C++'s <span class="bold"><b>member functions</b></span>
|
||||
<tbody><tr><td class="blurb"> <span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> <span class="bold"><strong>member function and
|
||||
methods</strong></span><br> <br> Python, like many object oriented languages
|
||||
uses the term <span class="bold"><strong>methods</strong></span>. Methods correspond
|
||||
roughly to C++'s <span class="bold"><strong>member functions</strong></span>
|
||||
</td></tr></tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
@@ -409,11 +416,10 @@
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.virtual_functions_with_default_implementations"></a>Virtual Functions with Default Implementations</h3></div></div></div>
|
||||
<p>
|
||||
Virtual Functions with Default ImplementationsWe've seen in the previous
|
||||
section how classes with pure virtual functions are wrapped using Boost.Python's
|
||||
<a href="../../../../v2/wrapper.html" target="_top">class wrapper</a> facilities. If
|
||||
we wish to wrap <span class="bold"><b>non</b></span>-pure-virtual functions
|
||||
instead, the mechanism is a bit different.
|
||||
We've seen in the previous section how classes with pure virtual functions
|
||||
are wrapped using Boost.Python's <a href="../../../../v2/wrapper.html" target="_top">class
|
||||
wrapper</a> facilities. If we wish to wrap <span class="bold"><strong>non</strong></span>-pure-virtual
|
||||
functions instead, the mechanism is a bit different.
|
||||
</p>
|
||||
<p>
|
||||
Recall that in the <a href="exposing.html#python.class_virtual_functions" title="Class Virtual Functions">previous
|
||||
@@ -427,8 +433,8 @@
|
||||
<span class="special">};</span>
|
||||
</pre>
|
||||
<p>
|
||||
had a pure virtual function <tt class="literal">f</tt>. If, however, its member
|
||||
function <tt class="literal">f</tt> was not declared as pure virtual:
|
||||
had a pure virtual function <code class="literal">f</code>. If, however, its member
|
||||
function <code class="literal">f</code> was not declared as pure virtual:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">struct</span> <span class="identifier">Base</span>
|
||||
@@ -454,16 +460,15 @@
|
||||
<span class="special">};</span>
|
||||
</pre>
|
||||
<p>
|
||||
Notice how we implemented <tt class="computeroutput"><span class="identifier">BaseWrap</span><span class="special">::</span><span class="identifier">f</span></tt>. Now,
|
||||
we have to check if there is an override for <tt class="computeroutput"><span class="identifier">f</span></tt>.
|
||||
If none, then we call <tt class="computeroutput"><span class="identifier">Base</span><span class="special">::</span><span class="identifier">f</span><span class="special">()</span></tt>.
|
||||
Notice how we implemented <code class="computeroutput"><span class="identifier">BaseWrap</span><span class="special">::</span><span class="identifier">f</span></code>. Now,
|
||||
we have to check if there is an override for <code class="computeroutput"><span class="identifier">f</span></code>.
|
||||
If none, then we call <code class="computeroutput"><span class="identifier">Base</span><span class="special">::</span><span class="identifier">f</span><span class="special">()</span></code>.
|
||||
</p>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/alert.png"></span> <span class="bold"><b>MSVC6/7 Workaround</b></span><br><br> If you are using
|
||||
Microsoft Visual C++ 6 or 7, you have to rewrite the line with the
|
||||
<tt class="computeroutput"><span class="special">*</span><span class="identifier">note</span><span class="special">*</span></tt> as:<br><br><tt class="computeroutput"><span class="keyword">return</span> <span class="identifier">call</span><span class="special"><</span><span class="keyword">char</span> <span class="keyword">const</span><span class="special">*>(</span><span class="identifier">f</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">());</span></tt>.</td></tr></tbody>
|
||||
<tbody><tr><td class="blurb"> <span class="inlinemediaobject"><img src="../images/alert.png" alt="alert"></span> <span class="bold"><strong>MSVC6/7 Workaround</strong></span><br>
|
||||
<br> If you are using Microsoft Visual C++ 6 or 7, you have to rewrite
|
||||
the line with the <code class="computeroutput"><span class="special">*</span><span class="identifier">note</span><span class="special">*</span></code> as:<br> <br> <code class="computeroutput"><span class="keyword">return</span> <span class="identifier">call</span><span class="special"><</span><span class="keyword">char</span> <span class="keyword">const</span><span class="special">*>(</span><span class="identifier">f</span><span class="special">.</span><span class="identifier">ptr</span><span class="special">());</span></code>.</td></tr></tbody>
|
||||
</table></div>
|
||||
<p>
|
||||
Finally, exposing:
|
||||
@@ -474,15 +479,16 @@
|
||||
<span class="special">;</span>
|
||||
</pre>
|
||||
<p>
|
||||
Take note that we expose both <tt class="computeroutput"><span class="special">&</span><span class="identifier">Base</span><span class="special">::</span><span class="identifier">f</span></tt> and <tt class="computeroutput"><span class="special">&</span><span class="identifier">BaseWrap</span><span class="special">::</span><span class="identifier">default_f</span></tt>. Boost.Python needs to keep track
|
||||
of 1) the dispatch function <tt class="literal">f</tt> and 2) the forwarding function
|
||||
to its default implementation <tt class="literal">default_f</tt>. There's a special
|
||||
<tt class="literal">def</tt> function for this purpose.
|
||||
Take note that we expose both <code class="computeroutput"><span class="special">&</span><span class="identifier">Base</span><span class="special">::</span><span class="identifier">f</span></code> and <code class="computeroutput"><span class="special">&</span><span class="identifier">BaseWrap</span><span class="special">::</span><span class="identifier">default_f</span></code>. Boost.Python needs to keep track
|
||||
of 1) the dispatch function <code class="literal">f</code> and 2) the forwarding function
|
||||
to its default implementation <code class="literal">default_f</code>. There's a special
|
||||
<code class="literal">def</code> function for this purpose.
|
||||
</p>
|
||||
<p>
|
||||
In Python, the results would be as expected:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="identifier">base</span> <span class="special">=</span> <span class="identifier">Base</span><span class="special">()</span>
|
||||
<span class="special">>>></span> <span class="keyword">class</span> <span class="identifier">Derived</span><span class="special">(</span><span class="identifier">Base</span><span class="special">):</span>
|
||||
@@ -492,14 +498,14 @@
|
||||
<span class="special">>>></span> <span class="identifier">derived</span> <span class="special">=</span> <span class="identifier">Derived</span><span class="special">()</span>
|
||||
</pre>
|
||||
<p>
|
||||
Calling <tt class="literal">base.f()</tt>:
|
||||
Calling <code class="literal">base.f()</code>:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="identifier">base</span><span class="special">.</span><span class="identifier">f</span><span class="special">()</span>
|
||||
<span class="number">0</span>
|
||||
</pre>
|
||||
<p>
|
||||
Calling <tt class="literal">derived.f()</tt>:
|
||||
Calling <code class="literal">derived.f()</code>:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="identifier">derived</span><span class="special">.</span><span class="identifier">f</span><span class="special">()</span>
|
||||
@@ -509,20 +515,21 @@
|
||||
<div class="section" lang="en">
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.class_operators_special_functions"></a>Class Operators/Special Functions</h3></div></div></div>
|
||||
<a name="class_operators_special_functions.class_operators_special_functionspython_operators"></a><h2>
|
||||
<a name="id447955"></a>
|
||||
Class Operators/Special FunctionsPython Operators
|
||||
</h2>
|
||||
<a name="class_operators_special_functions.python_operators"></a><h3>
|
||||
<a name="id3142031"></a>
|
||||
Python Operators
|
||||
</h3>
|
||||
<p>
|
||||
C is well known for the abundance of operators. C++ extends this to the extremes
|
||||
by allowing operator overloading. Boost.Python takes advantage of this and
|
||||
makes it easy to wrap C++ operator-powered classes.
|
||||
</p>
|
||||
<p>
|
||||
Consider a file position class <tt class="literal">FilePos</tt> and a set of operators
|
||||
Consider a file position class <code class="literal">FilePos</code> and a set of operators
|
||||
that take on FilePos instances:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">class</span> <span class="identifier">FilePos</span> <span class="special">{</span> <span class="comment">/*...*/</span> <span class="special">};</span>
|
||||
|
||||
@@ -551,16 +558,16 @@
|
||||
<p>
|
||||
The code snippet above is very clear and needs almost no explanation at all.
|
||||
It is virtually the same as the operators' signatures. Just take note that
|
||||
<tt class="literal">self</tt> refers to FilePos object. Also, not every class
|
||||
<tt class="literal">T</tt> that you might need to interact with in an operator
|
||||
expression is (cheaply) default-constructible. You can use <tt class="literal">other<T>()</tt>
|
||||
in place of an actual <tt class="literal">T</tt> instance when writing "self
|
||||
<code class="literal">self</code> refers to FilePos object. Also, not every class
|
||||
<code class="literal">T</code> that you might need to interact with in an operator
|
||||
expression is (cheaply) default-constructible. You can use <code class="literal">other<T>()</code>
|
||||
in place of an actual <code class="literal">T</code> instance when writing "self
|
||||
expressions".
|
||||
</p>
|
||||
<a name="class_operators_special_functions.special_methods"></a><h2>
|
||||
<a name="id448698"></a>
|
||||
<a name="class_operators_special_functions.special_methods"></a><h3>
|
||||
<a name="id3142715"></a>
|
||||
Special Methods
|
||||
</h2>
|
||||
</h3>
|
||||
<p>
|
||||
Python has a few more <span class="emphasis"><em>Special Methods</em></span>. Boost.Python
|
||||
supports all of the standard special method names supported by real Python
|
||||
@@ -588,10 +595,8 @@
|
||||
</p>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/note.png"></span>
|
||||
What is the business of <tt class="computeroutput"><span class="keyword">operator</span><span class="special"><<</span></tt>? Well, the method <tt class="computeroutput"><span class="identifier">str</span></tt> requires the <tt class="computeroutput"><span class="keyword">operator</span><span class="special"><<</span></tt> to do its work (i.e. <tt class="computeroutput"><span class="keyword">operator</span><span class="special"><<</span></tt>
|
||||
is used by the method defined by <tt class="computeroutput"><span class="identifier">def</span><span class="special">(</span><span class="identifier">str</span><span class="special">(</span><span class="identifier">self</span><span class="special">))</span></tt>.</td></tr></tbody>
|
||||
<tbody><tr><td class="blurb"> <span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> What is the business of <code class="computeroutput"><span class="keyword">operator</span><span class="special"><<</span></code>? Well, the method <code class="computeroutput"><span class="identifier">str</span></code> requires the <code class="computeroutput"><span class="keyword">operator</span><span class="special"><<</span></code> to do its work (i.e. <code class="computeroutput"><span class="keyword">operator</span><span class="special"><<</span></code>
|
||||
is used by the method defined by <code class="computeroutput"><span class="identifier">def</span><span class="special">(</span><span class="identifier">str</span><span class="special">(</span><span class="identifier">self</span><span class="special">))</span></code>.</td></tr></tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
@@ -3,15 +3,15 @@
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
||||
<title>Functions</title>
|
||||
<link rel="stylesheet" href="../boostbook.css" type="text/css">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
|
||||
<link rel="start" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="up" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="prev" href="exposing.html" title=" Exposing Classes">
|
||||
<link rel="next" href="object.html" title=" Object Interface">
|
||||
<link rel="prev" href="exposing.html" title="Exposing Classes">
|
||||
<link rel="next" href="object.html" title="Object Interface">
|
||||
</head>
|
||||
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||||
<table cellpadding="2" width="100%">
|
||||
<td valign="top"><img alt="boost.png (6897 bytes)" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td align="center"><a href="../../../../../../../index.htm">Home</a></td>
|
||||
<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td>
|
||||
<td align="center"><a href="../../../../../../../people/people.htm">People</a></td>
|
||||
@@ -32,16 +32,18 @@
|
||||
<dt><span class="section"><a href="functions.html#python.auto_overloading">Auto-Overloading</a></span></dt>
|
||||
</dl></div>
|
||||
<p>
|
||||
FunctionsIn this chapter, we'll look at Boost.Python powered functions in closer
|
||||
detail. We shall see some facilities to make exposing C++ functions to Python
|
||||
safe from potential pifalls such as dangling pointers and references. We shall
|
||||
also see facilities that will make it even easier for us to expose C++ functions
|
||||
In this chapter, we'll look at Boost.Python powered functions in closer detail.
|
||||
We shall see some facilities to make exposing C++ functions to Python safe
|
||||
from potential pifalls such as dangling pointers and references. We shall also
|
||||
see facilities that will make it even easier for us to expose C++ functions
|
||||
that take advantage of C++ features such as overloading and default arguments.
|
||||
</p>
|
||||
<div class="blockquote"><blockquote class="blockquote"><p><span class="emphasis"><em>Read on...</em></span></p></blockquote></div>
|
||||
<div class="blockquote"><blockquote class="blockquote"><p>
|
||||
<span class="emphasis"><em>Read on...</em></span>
|
||||
</p></blockquote></div>
|
||||
<p>
|
||||
But before you do, you might want to fire up Python 2.2 or later and type
|
||||
<tt class="literal">>>> import this</tt>.
|
||||
<code class="literal">>>> import this</code>.
|
||||
</p>
|
||||
<pre class="programlisting">>>> import this
|
||||
The Zen of Python, by Tim Peters
|
||||
@@ -60,7 +62,7 @@ In the face of ambiguity, refuse the temptation to guess.
|
||||
There should be one-- and preferably only one --obvious way to do it
|
||||
Although that way may not be obvious at first unless you're Dutch.
|
||||
Now is better than never.
|
||||
Although never is often better than <span class="bold"><b>right</b></span> now.
|
||||
Although never is often better than <span class="bold"><strong>right</strong></span> now.
|
||||
If the implementation is hard to explain, it's a bad idea.
|
||||
If the implementation is easy to explain, it may be a good idea.
|
||||
Namespaces are one honking great idea -- let's do more of those!
|
||||
@@ -69,15 +71,15 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.call_policies"></a>Call Policies</h3></div></div></div>
|
||||
<p>
|
||||
Call PoliciesIn C++, we often deal with arguments and return types such as
|
||||
pointers and references. Such primitive types are rather, ummmm, low level
|
||||
and they really don't tell us much. At the very least, we don't know the
|
||||
owner of the pointer or the referenced object. No wonder languages such as
|
||||
Java and Python never deal with such low level entities. In C++, it's usually
|
||||
considered a good practice to use smart pointers which exactly describe ownership
|
||||
semantics. Still, even good C++ interfaces use raw references and pointers
|
||||
sometimes, so Boost.Python must deal with them. To do this, it may need your
|
||||
help. Consider the following C++ function:
|
||||
In C++, we often deal with arguments and return types such as pointers and
|
||||
references. Such primitive types are rather, ummmm, low level and they really
|
||||
don't tell us much. At the very least, we don't know the owner of the pointer
|
||||
or the referenced object. No wonder languages such as Java and Python never
|
||||
deal with such low level entities. In C++, it's usually considered a good
|
||||
practice to use smart pointers which exactly describe ownership semantics.
|
||||
Still, even good C++ interfaces use raw references and pointers sometimes,
|
||||
so Boost.Python must deal with them. To do this, it may need your help. Consider
|
||||
the following C++ function:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">X</span><span class="special">&</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Y</span><span class="special">&</span> <span class="identifier">y</span><span class="special">,</span> <span class="identifier">Z</span><span class="special">*</span> <span class="identifier">z</span><span class="special">);</span>
|
||||
@@ -118,24 +120,25 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
</p>
|
||||
<div class="orderedlist"><ol type="1">
|
||||
<li>
|
||||
<tt class="literal">f</tt> is called passing in a reference to <tt class="literal">y</tt>
|
||||
and a pointer to <tt class="literal">z</tt>
|
||||
<code class="literal">f</code> is called passing in a reference to <code class="literal">y</code>
|
||||
and a pointer to <code class="literal">z</code>
|
||||
</li>
|
||||
<li>
|
||||
A reference to <tt class="literal">y.x</tt> is returned
|
||||
A reference to <code class="literal">y.x</code> is returned
|
||||
</li>
|
||||
<li>
|
||||
<tt class="literal">y</tt> is deleted. <tt class="literal">x</tt> is a dangling reference
|
||||
<code class="literal">y</code> is deleted. <code class="literal">x</code> is a dangling reference
|
||||
</li>
|
||||
<li>
|
||||
<tt class="literal">x.some_method()</tt> is called
|
||||
<code class="literal">x.some_method()</code> is called
|
||||
</li>
|
||||
<li><span class="bold"><b>BOOM!</b></span></li>
|
||||
<li><span class="bold"><strong>BOOM!</strong></span></li>
|
||||
</ol></div>
|
||||
<p>
|
||||
We could copy result into a new object:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">y</span><span class="special">,</span> <span class="identifier">z</span><span class="special">).</span><span class="identifier">set</span><span class="special">(</span><span class="number">42</span><span class="special">)</span> <span class="comment"># Result disappears
|
||||
</span><span class="special">>>></span> <span class="identifier">y</span><span class="special">.</span><span class="identifier">x</span><span class="special">.</span><span class="identifier">get</span><span class="special">()</span> <span class="comment"># No crash, but still bad
|
||||
@@ -149,7 +152,8 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
<p>
|
||||
Our problems do not end there. Suppose Y is implemented as follows:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">struct</span> <span class="identifier">Y</span>
|
||||
<span class="special">{</span>
|
||||
@@ -158,7 +162,7 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
<span class="special">};</span>
|
||||
</pre>
|
||||
<p>
|
||||
Notice that the data member <tt class="literal">z</tt> is held by class Y using
|
||||
Notice that the data member <code class="literal">z</code> is held by class Y using
|
||||
a raw pointer. Now we have a potential dangling pointer problem inside Y:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
@@ -167,7 +171,7 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
<span class="special">>>></span> <span class="identifier">y</span><span class="special">.</span><span class="identifier">z_value</span><span class="special">()</span> # <span class="identifier">CRASH</span><span class="special">!</span>
|
||||
</pre>
|
||||
<p>
|
||||
For reference, here's the implementation of <tt class="literal">f</tt> again:
|
||||
For reference, here's the implementation of <code class="literal">f</code> again:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">X</span><span class="special">&</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">Y</span><span class="special">&</span> <span class="identifier">y</span><span class="special">,</span> <span class="identifier">Z</span><span class="special">*</span> <span class="identifier">z</span><span class="special">)</span>
|
||||
@@ -181,33 +185,33 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
</p>
|
||||
<div class="orderedlist"><ol type="1">
|
||||
<li>
|
||||
<tt class="literal">f</tt> is called passing in a reference to <tt class="literal">y</tt>
|
||||
and a pointer to <tt class="literal">z</tt>
|
||||
<code class="literal">f</code> is called passing in a reference to <code class="literal">y</code>
|
||||
and a pointer to <code class="literal">z</code>
|
||||
</li>
|
||||
<li>
|
||||
A pointer to <tt class="literal">z</tt> is held by <tt class="literal">y</tt>
|
||||
A pointer to <code class="literal">z</code> is held by <code class="literal">y</code>
|
||||
</li>
|
||||
<li>
|
||||
A reference to <tt class="literal">y.x</tt> is returned
|
||||
A reference to <code class="literal">y.x</code> is returned
|
||||
</li>
|
||||
<li>
|
||||
<tt class="literal">z</tt> is deleted. <tt class="literal">y.z</tt> is a dangling pointer
|
||||
<code class="literal">z</code> is deleted. <code class="literal">y.z</code> is a dangling pointer
|
||||
</li>
|
||||
<li>
|
||||
<tt class="literal">y.z_value()</tt> is called
|
||||
<code class="literal">y.z_value()</code> is called
|
||||
</li>
|
||||
<li>
|
||||
<tt class="literal">z->value()</tt> is called
|
||||
<code class="literal">z->value()</code> is called
|
||||
</li>
|
||||
<li><span class="bold"><b>BOOM!</b></span></li>
|
||||
<li><span class="bold"><strong>BOOM!</strong></span></li>
|
||||
</ol></div>
|
||||
<a name="call_policies.call_policies"></a><h2>
|
||||
<a name="id450599"></a>
|
||||
<a name="call_policies.call_policies"></a><h3>
|
||||
<a name="id3144432"></a>
|
||||
Call Policies
|
||||
</h2>
|
||||
</h3>
|
||||
<p>
|
||||
Call Policies may be used in situations such as the example detailed above.
|
||||
In our example, <tt class="literal">return_internal_reference</tt> and <tt class="literal">with_custodian_and_ward</tt>
|
||||
In our example, <code class="literal">return_internal_reference</code> and <code class="literal">with_custodian_and_ward</code>
|
||||
are our friends:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
@@ -216,27 +220,27 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
<span class="identifier">with_custodian_and_ward</span><span class="special"><</span><span class="number">1</span><span class="special">,</span> <span class="number">2</span><span class="special">></span> <span class="special">>());</span>
|
||||
</pre>
|
||||
<p>
|
||||
What are the <tt class="literal">1</tt> and <tt class="literal">2</tt> parameters, you
|
||||
What are the <code class="literal">1</code> and <code class="literal">2</code> parameters, you
|
||||
ask?
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">return_internal_reference</span><span class="special"><</span><span class="number">1</span>
|
||||
</pre>
|
||||
<p>
|
||||
Informs Boost.Python that the first argument, in our case <tt class="literal">Y&
|
||||
y</tt>, is the owner of the returned reference: <tt class="literal">X&</tt>.
|
||||
The "<tt class="literal">1</tt>" simply specifies the first argument.
|
||||
In short: "return an internal reference <tt class="literal">X&</tt> owned
|
||||
by the 1st argument <tt class="literal">Y& y</tt>".
|
||||
Informs Boost.Python that the first argument, in our case <code class="literal">Y&
|
||||
y</code>, is the owner of the returned reference: <code class="literal">X&</code>.
|
||||
The "<code class="literal">1</code>" simply specifies the first argument.
|
||||
In short: "return an internal reference <code class="literal">X&</code> owned
|
||||
by the 1st argument <code class="literal">Y& y</code>".
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">with_custodian_and_ward</span><span class="special"><</span><span class="number">1</span><span class="special">,</span> <span class="number">2</span><span class="special">></span>
|
||||
</pre>
|
||||
<p>
|
||||
Informs Boost.Python that the lifetime of the argument indicated by ward
|
||||
(i.e. the 2nd argument: <tt class="literal">Z* z</tt>) is dependent on the lifetime
|
||||
of the argument indicated by custodian (i.e. the 1st argument: <tt class="literal">Y&
|
||||
y</tt>).
|
||||
(i.e. the 2nd argument: <code class="literal">Z* z</code>) is dependent on the lifetime
|
||||
of the argument indicated by custodian (i.e. the 1st argument: <code class="literal">Y&
|
||||
y</code>).
|
||||
</p>
|
||||
<p>
|
||||
It is also important to note that we have defined two policies above. Two
|
||||
@@ -253,52 +257,51 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
</p>
|
||||
<div class="itemizedlist"><ul type="disc">
|
||||
<li>
|
||||
<span class="bold"><b>with_custodian_and_ward</b></span><br> Ties lifetimes
|
||||
<span class="bold"><strong>with_custodian_and_ward</strong></span><br> Ties lifetimes
|
||||
of the arguments
|
||||
</li>
|
||||
<li>
|
||||
<span class="bold"><b>with_custodian_and_ward_postcall</b></span><br>
|
||||
<span class="bold"><strong>with_custodian_and_ward_postcall</strong></span><br>
|
||||
Ties lifetimes of the arguments and results
|
||||
</li>
|
||||
<li>
|
||||
<span class="bold"><b>return_internal_reference</b></span><br> Ties lifetime
|
||||
<span class="bold"><strong>return_internal_reference</strong></span><br> Ties lifetime
|
||||
of one argument to that of result
|
||||
</li>
|
||||
<li>
|
||||
<span class="bold"><b>return_value_policy<T> with T one of:</b></span><br>
|
||||
<span class="bold"><strong>return_value_policy<T> with T one of:</strong></span><br>
|
||||
</li>
|
||||
<li>
|
||||
<span class="bold"><b>reference_existing_object</b></span><br> naive
|
||||
<span class="bold"><strong>reference_existing_object</strong></span><br> naive
|
||||
(dangerous) approach
|
||||
</li>
|
||||
<li>
|
||||
<span class="bold"><b>copy_const_reference</b></span><br> Boost.Python
|
||||
<span class="bold"><strong>copy_const_reference</strong></span><br> Boost.Python
|
||||
v1 approach
|
||||
</li>
|
||||
<li>
|
||||
<span class="bold"><b>copy_non_const_reference</b></span><br>
|
||||
<span class="bold"><strong>copy_non_const_reference</strong></span><br>
|
||||
</li>
|
||||
<li>
|
||||
<span class="bold"><b>manage_new_object</b></span><br> Adopt a pointer
|
||||
<span class="bold"><strong>manage_new_object</strong></span><br> Adopt a pointer
|
||||
and hold the instance
|
||||
</li>
|
||||
</ul></div>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/smiley.png"></span> <span class="bold"><b>Remember the Zen, Luke:</b></span><br><br> "Explicit
|
||||
is better than implicit"<br> "In the face of ambiguity,
|
||||
refuse the temptation to guess"<br>
|
||||
</td></tr></tbody>
|
||||
<tbody><tr><td class="blurb"> <span class="inlinemediaobject"><img src="../images/smiley.png" alt="smiley"></span> <span class="bold"><strong>Remember the Zen, Luke:</strong></span><br>
|
||||
<br> "Explicit is better than implicit"<br> "In
|
||||
the face of ambiguity, refuse the temptation to guess"<br>
|
||||
</td></tr></tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
<div class="section" lang="en">
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.overloading"></a>Overloading</h3></div></div></div>
|
||||
<p>
|
||||
OverloadingThe following illustrates a scheme for manually wrapping an overloaded
|
||||
member functions. Of course, the same technique can be applied to wrapping
|
||||
overloaded non-member functions.
|
||||
The following illustrates a scheme for manually wrapping an overloaded member
|
||||
functions. Of course, the same technique can be applied to wrapping overloaded
|
||||
non-member functions.
|
||||
</p>
|
||||
<p>
|
||||
We have here our C++ class:
|
||||
@@ -351,22 +354,22 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.default_arguments"></a>Default Arguments</h3></div></div></div>
|
||||
<p>
|
||||
Default ArgumentsBoost.Python wraps (member) function pointers. Unfortunately,
|
||||
C++ function pointers carry no default argument info. Take a function <tt class="literal">f</tt>
|
||||
Boost.Python wraps (member) function pointers. Unfortunately, C++ function
|
||||
pointers carry no default argument info. Take a function <code class="literal">f</code>
|
||||
with default arguments:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">int</span> <span class="identifier">f</span><span class="special">(</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">double</span> <span class="special">=</span> <span class="number">3.14</span><span class="special">,</span> <span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="special">=</span> <span class="string">"hello"</span><span class="special">);</span>
|
||||
</pre>
|
||||
<p>
|
||||
But the type of a pointer to the function <tt class="literal">f</tt> has no information
|
||||
But the type of a pointer to the function <code class="literal">f</code> has no information
|
||||
about its default arguments:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">int</span><span class="special">(*</span><span class="identifier">g</span><span class="special">)(</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">double</span><span class="special">,</span><span class="keyword">char</span> <span class="keyword">const</span><span class="special">*)</span> <span class="special">=</span> <span class="identifier">f</span><span class="special">;</span> <span class="comment">// defaults lost!
|
||||
</span></pre>
|
||||
<p>
|
||||
When we pass this function pointer to the <tt class="literal">def</tt> function,
|
||||
When we pass this function pointer to the <code class="literal">def</code> function,
|
||||
there is no way to retrieve the default arguments:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
@@ -400,10 +403,10 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
are overloaded with a common sequence of initial arguments
|
||||
</li>
|
||||
</ul></div>
|
||||
<a name="default_arguments.boost_python_function_overloads"></a><h2>
|
||||
<a name="id452559"></a>
|
||||
<a name="default_arguments.boost_python_function_overloads"></a><h3>
|
||||
<a name="id3146300"></a>
|
||||
BOOST_PYTHON_FUNCTION_OVERLOADS
|
||||
</h2>
|
||||
</h3>
|
||||
<p>
|
||||
Boost.Python now has a way to make it easier. For instance, given a function:
|
||||
</p>
|
||||
@@ -421,19 +424,19 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
</pre>
|
||||
<p>
|
||||
will automatically create the thin wrappers for us. This macro will create
|
||||
a class <tt class="literal">foo_overloads</tt> that can be passed on to <tt class="literal">def(...)</tt>.
|
||||
a class <code class="literal">foo_overloads</code> that can be passed on to <code class="literal">def(...)</code>.
|
||||
The third and fourth macro argument are the minimum arguments and maximum
|
||||
arguments, respectively. In our <tt class="literal">foo</tt> function the minimum
|
||||
number of arguments is 1 and the maximum number of arguments is 4. The <tt class="literal">def(...)</tt>
|
||||
arguments, respectively. In our <code class="literal">foo</code> function the minimum
|
||||
number of arguments is 1 and the maximum number of arguments is 4. The <code class="literal">def(...)</code>
|
||||
function will automatically add all the foo variants for us:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">def</span><span class="special">(</span><span class="string">"foo"</span><span class="special">,</span> <span class="identifier">foo</span><span class="special">,</span> <span class="identifier">foo_overloads</span><span class="special">());</span>
|
||||
</pre>
|
||||
<a name="default_arguments.boost_python_member_function_overloads"></a><h2>
|
||||
<a name="id452863"></a>
|
||||
<a name="default_arguments.boost_python_member_function_overloads"></a><h3>
|
||||
<a name="id3146587"></a>
|
||||
BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS
|
||||
</h2>
|
||||
</h3>
|
||||
<p>
|
||||
Objects here, objects there, objects here there everywhere. More frequently
|
||||
than anything else, we need to expose member functions of our classes to
|
||||
@@ -442,7 +445,7 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
play. Another macro is provided to make this a breeze.
|
||||
</p>
|
||||
<p>
|
||||
Like <tt class="literal">BOOST_PYTHON_FUNCTION_OVERLOADS</tt>, <tt class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</tt>
|
||||
Like <code class="literal">BOOST_PYTHON_FUNCTION_OVERLOADS</code>, <code class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</code>
|
||||
may be used to automatically create the thin wrappers for wrapping member
|
||||
functions. Let's have an example:
|
||||
</p>
|
||||
@@ -463,11 +466,11 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
<span class="identifier">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</span><span class="special">(</span><span class="identifier">george_overloads</span><span class="special">,</span> <span class="identifier">wack_em</span><span class="special">,</span> <span class="number">1</span><span class="special">,</span> <span class="number">3</span><span class="special">)</span>
|
||||
</pre>
|
||||
<p>
|
||||
will generate a set of thin wrappers for george's <tt class="literal">wack_em</tt>
|
||||
will generate a set of thin wrappers for george's <code class="literal">wack_em</code>
|
||||
member function accepting a minimum of 1 and a maximum of 3 arguments (i.e.
|
||||
the third and fourth macro argument). The thin wrappers are all enclosed
|
||||
in a class named <tt class="literal">george_overloads</tt> that can then be used
|
||||
as an argument to <tt class="literal">def(...)</tt>:
|
||||
in a class named <code class="literal">george_overloads</code> that can then be used
|
||||
as an argument to <code class="literal">def(...)</code>:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"wack_em"</span><span class="special">,</span> <span class="special">&</span><span class="identifier">george</span><span class="special">::</span><span class="identifier">wack_em</span><span class="special">,</span> <span class="identifier">george_overloads</span><span class="special">());</span>
|
||||
@@ -476,13 +479,13 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
See the <a href="../../../../v2/overloads.html#BOOST_PYTHON_FUNCTION_OVERLOADS-spec" target="_top">overloads
|
||||
reference</a> for details.
|
||||
</p>
|
||||
<a name="default_arguments.init_and_optional"></a><h2>
|
||||
<a name="id453212"></a>
|
||||
<a name="default_arguments.init_and_optional"></a><h3>
|
||||
<a name="id3146923"></a>
|
||||
init and optional
|
||||
</h2>
|
||||
</h3>
|
||||
<p>
|
||||
A similar facility is provided for class constructors, again, with default
|
||||
arguments or a sequence of overloads. Remember <tt class="literal">init<...></tt>?
|
||||
arguments or a sequence of overloads. Remember <code class="literal">init<...></code>?
|
||||
For example, given a class X with a constructor:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
@@ -499,7 +502,7 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="identifier">init</span><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">optional</span><span class="special"><</span><span class="keyword">char</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">,</span> <span class="keyword">double</span><span class="special">></span> <span class="special">>())</span>
|
||||
</pre>
|
||||
<p>
|
||||
Notice the use of <tt class="literal">init<...></tt> and <tt class="literal">optional<...></tt>
|
||||
Notice the use of <code class="literal">init<...></code> and <code class="literal">optional<...></code>
|
||||
to signify the default (optional arguments).
|
||||
</p>
|
||||
</div>
|
||||
@@ -507,10 +510,10 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.auto_overloading"></a>Auto-Overloading</h3></div></div></div>
|
||||
<p>
|
||||
Auto-OverloadingIt was mentioned in passing in the previous section that
|
||||
<tt class="literal">BOOST_PYTHON_FUNCTION_OVERLOADS</tt> and <tt class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</tt>
|
||||
can also be used for overloaded functions and member functions with a common
|
||||
sequence of initial arguments. Here is an example:
|
||||
It was mentioned in passing in the previous section that <code class="literal">BOOST_PYTHON_FUNCTION_OVERLOADS</code>
|
||||
and <code class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</code> can also be
|
||||
used for overloaded functions and member functions with a common sequence
|
||||
of initial arguments. Here is an example:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">void</span> <span class="identifier">foo</span><span class="special">()</span>
|
||||
@@ -544,30 +547,30 @@ Namespaces are one honking great idea -- let's do more of those!
|
||||
Then...
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"foo"</span><span class="special">,</span> <span class="identifier">foo</span><span class="special">,</span> <span class="identifier">foo_overloads</span><span class="special">());</span>
|
||||
<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"foo"</span><span class="special">,</span> <span class="special">(</span><span class="keyword">void</span><span class="special">(*)(</span><span class="keyword">bool</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">char</span><span class="special">))</span><span class="number">0</span><span class="special">,</span> <span class="identifier">foo_overloads</span><span class="special">());</span>
|
||||
</pre>
|
||||
<p>
|
||||
Notice though that we have a situation now where we have a minimum of zero
|
||||
(0) arguments and a maximum of 3 arguments.
|
||||
</p>
|
||||
<a name="auto_overloading.manual_wrapping"></a><h2>
|
||||
<a name="id453917"></a>
|
||||
<a name="auto_overloading.manual_wrapping"></a><h3>
|
||||
<a name="id3147627"></a>
|
||||
Manual Wrapping
|
||||
</h2>
|
||||
</h3>
|
||||
<p>
|
||||
It is important to emphasize however that <span class="bold"><b>the overloaded
|
||||
functions must have a common sequence of initial arguments</b></span>. Otherwise,
|
||||
It is important to emphasize however that <span class="bold"><strong>the overloaded
|
||||
functions must have a common sequence of initial arguments</strong></span>. Otherwise,
|
||||
our scheme above will not work. If this is not the case, we have to wrap
|
||||
our functions <a href="functions.html#python.overloading" title="Overloading">manually</a>.
|
||||
</p>
|
||||
<p>
|
||||
Actually, we can mix and match manual wrapping of overloaded functions and
|
||||
automatic wrapping through <tt class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</tt>
|
||||
and its sister, <tt class="literal">BOOST_PYTHON_FUNCTION_OVERLOADS</tt>. Following
|
||||
automatic wrapping through <code class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</code>
|
||||
and its sister, <code class="literal">BOOST_PYTHON_FUNCTION_OVERLOADS</code>. Following
|
||||
up on our example presented in the section <a href="functions.html#python.overloading" title="Overloading">on
|
||||
overloading</a>, since the first 4 overload functins have a common sequence
|
||||
of initial arguments, we can use <tt class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</tt>
|
||||
to automatically wrap the first three of the <tt class="literal">def</tt>s and
|
||||
of initial arguments, we can use <code class="literal">BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS</code>
|
||||
to automatically wrap the first three of the <code class="literal">def</code>s and
|
||||
manually wrap just the last. Here's how we'll do this:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
|
||||
@@ -1,17 +1,17 @@
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
||||
<title> Building Hello World</title>
|
||||
<title>Building Hello World</title>
|
||||
<link rel="stylesheet" href="../boostbook.css" type="text/css">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
|
||||
<link rel="start" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="up" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="prev" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="next" href="exposing.html" title=" Exposing Classes">
|
||||
<link rel="next" href="exposing.html" title="Exposing Classes">
|
||||
</head>
|
||||
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||||
<table cellpadding="2" width="100%">
|
||||
<td valign="top"><img alt="boost.png (6897 bytes)" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td align="center"><a href="../../../../../../../index.htm">Home</a></td>
|
||||
<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td>
|
||||
<td align="center"><a href="../../../../../../../people/people.htm">People</a></td>
|
||||
@@ -25,23 +25,23 @@
|
||||
<div class="section" lang="en">
|
||||
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
|
||||
<a name="python.hello"></a> Building Hello World</h2></div></div></div>
|
||||
<a name="hello._building_hello_worldfrom_start_to_finish"></a><h2>
|
||||
<a name="id442456"></a>
|
||||
Building Hello WorldFrom Start To Finish
|
||||
</h2>
|
||||
<a name="hello.from_start_to_finish"></a><h3>
|
||||
<a name="id3091224"></a>
|
||||
From Start To Finish
|
||||
</h3>
|
||||
<p>
|
||||
Now the first thing you'd want to do is to build the Hello World module and
|
||||
try it for yourself in Python. In this section, we shall outline the steps
|
||||
necessary to achieve that. We shall use the build tool that comes bundled with
|
||||
every boost distribution: <span class="bold"><b>bjam</b></span>.
|
||||
every boost distribution: <span class="bold"><strong>bjam</strong></span>.
|
||||
</p>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/note.png"></span> <span class="bold"><b>Building without bjam</b></span><br><br> Besides bjam,
|
||||
there are of course other ways to get your module built. What's written
|
||||
here should not be taken as "the one and only way". There are
|
||||
of course other build tools apart from <tt class="literal">bjam</tt>.<br><br> Take note however that the preferred build tool for Boost.Python
|
||||
<tbody><tr><td class="blurb"> <span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> <span class="bold"><strong>Building without bjam</strong></span><br>
|
||||
<br> Besides bjam, there are of course other ways to get your module
|
||||
built. What's written here should not be taken as "the one and only
|
||||
way". There are of course other build tools apart from <code class="literal">bjam</code>.<br>
|
||||
<br> Take note however that the preferred build tool for Boost.Python
|
||||
is bjam. There are so many ways to set up the build incorrectly. Experience
|
||||
shows that 90% of the "I can't build Boost.Python" problems
|
||||
come from people who had to use a different tool. </td></tr></tbody>
|
||||
@@ -76,7 +76,7 @@
|
||||
if you are on Unix.
|
||||
</p>
|
||||
<p>
|
||||
The tutorial example can be found in the directory: <tt class="literal">libs/python/example/tutorial</tt>.
|
||||
The tutorial example can be found in the directory: <code class="literal">libs/python/example/tutorial</code>.
|
||||
There, you can find:
|
||||
</p>
|
||||
<div class="itemizedlist"><ul type="disc">
|
||||
@@ -88,21 +88,23 @@
|
||||
</li>
|
||||
</ul></div>
|
||||
<p>
|
||||
The <tt class="literal">hello.cpp</tt> file is our C++ hello world example. The
|
||||
<tt class="literal">Jamfile</tt> is a minimalist <span class="emphasis"><em>bjam</em></span> script
|
||||
The <code class="literal">hello.cpp</code> file is our C++ hello world example. The
|
||||
<code class="literal">Jamfile</code> is a minimalist <span class="emphasis"><em>bjam</em></span> script
|
||||
that builds the DLLs for us.
|
||||
</p>
|
||||
<p>
|
||||
Before anything else, you should have the bjam executable in your boost directory
|
||||
or somewhere in your path such that <tt class="literal">bjam</tt> can be executed
|
||||
or somewhere in your path such that <code class="literal">bjam</code> can be executed
|
||||
in the command line. Pre-built Boost.Jam executables are available for most
|
||||
platforms. The complete list of Bjam executables can be found <a href="http://sourceforge.net/project/showfiles.php?group_id=7586" target="_top">here</a>.
|
||||
</p>
|
||||
<a name="hello.let_s_jam_"></a><h2>
|
||||
<a name="id373799"></a>
|
||||
<a name="hello.let_s_jam_"></a><h3>
|
||||
<a name="id3091427"></a>
|
||||
Let's Jam!
|
||||
</h2>
|
||||
<p><span class="inlinemediaobject"><img src="../images/jam.png"></span></p>
|
||||
</h3>
|
||||
<p>
|
||||
<span class="inlinemediaobject"><img src="../images/jam.png" alt="jam"></span>
|
||||
</p>
|
||||
<p>
|
||||
Here is our minimalist Jamfile:
|
||||
</p>
|
||||
@@ -119,13 +121,13 @@ extension hello # Declare a Python extension called hello
|
||||
</pre>
|
||||
<p>
|
||||
First, we need to specify our location. You may place your project anywhere.
|
||||
<tt class="literal">project-root</tt> allows you to do that.
|
||||
<code class="literal">project-root</code> allows you to do that.
|
||||
</p>
|
||||
<pre class="programlisting">project-root ;
|
||||
</pre>
|
||||
<p>
|
||||
By doing so, you'll need a Jamrules file. Simply copy the one in the <a href="../../../../../example/tutorial/Jamrules" target="_top">example/tutorial directory</a>
|
||||
and tweak the <tt class="literal">path-global BOOST_ROOT</tt> to where your boost
|
||||
and tweak the <code class="literal">path-global BOOST_ROOT</code> to where your boost
|
||||
root directory is. The file has <a href="../../../../../example/tutorial/Jamrules" target="_top">detailed
|
||||
instructions</a> you can follow.
|
||||
</p>
|
||||
@@ -135,7 +137,7 @@ extension hello # Declare a Python extension called hello
|
||||
<pre class="programlisting">import python ;
|
||||
</pre>
|
||||
<p>
|
||||
Finally we declare our <tt class="literal">hello</tt> extension:
|
||||
Finally we declare our <code class="literal">hello</code> extension:
|
||||
</p>
|
||||
<pre class="programlisting">extension hello # Declare a Python extension called hello
|
||||
: hello.cpp # source
|
||||
@@ -147,11 +149,12 @@ extension hello # Declare a Python extension called hello
|
||||
<p>
|
||||
The last part tells BJam that we are depending on the Boost Python Library.
|
||||
</p>
|
||||
<a name="hello.running_bjam"></a><h2>
|
||||
<a name="id373910"></a>
|
||||
<a name="hello.running_bjam"></a><h3>
|
||||
<a name="id3091556"></a>
|
||||
Running bjam
|
||||
</h2>
|
||||
<p><span class="emphasis"><em>bjam</em></span> is run using your operating system's command line
|
||||
</h3>
|
||||
<p>
|
||||
<span class="emphasis"><em>bjam</em></span> is run using your operating system's command line
|
||||
interpreter.
|
||||
</p>
|
||||
<div class="blockquote"><blockquote class="blockquote"><p>
|
||||
@@ -159,7 +162,7 @@ extension hello # Declare a Python extension called hello
|
||||
</p></blockquote></div>
|
||||
<p>
|
||||
Make sure that the environment is set so that we can invoke the C++ compiler.
|
||||
With MSVC, that would mean running the <tt class="literal">Vcvars32.bat</tt> batch
|
||||
With MSVC, that would mean running the <code class="literal">Vcvars32.bat</code> batch
|
||||
file. For instance:
|
||||
</p>
|
||||
<pre class="programlisting">C:\Program Files\Microsoft Visual Studio .NET 2003\Common7\Tools\vsvars32.bat
|
||||
@@ -172,15 +175,13 @@ extension hello # Declare a Python extension called hello
|
||||
set PYTHON_VERSION=2.2
|
||||
</pre>
|
||||
<p>
|
||||
The above assumes that the Python installation is in <tt class="literal">c:/dev/tools/python</tt>
|
||||
The above assumes that the Python installation is in <code class="literal">c:/dev/tools/python</code>
|
||||
and that we are using Python version 2.2. You'll have to tweak these appropriately.
|
||||
</p>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/tip.png"></span>
|
||||
Be sure not to include a third number, e.g. <span class="bold"><b>not</b></span>
|
||||
"2.2.1", even if that's the version you have.</td></tr></tbody>
|
||||
<tbody><tr><td class="blurb"> <span class="inlinemediaobject"><img src="../images/tip.png" alt="tip"></span> Be sure not to include a third number, e.g. <span class="bold"><strong>not</strong></span> "2.2.1", even if that's the version
|
||||
you have.</td></tr></tbody>
|
||||
</table></div>
|
||||
<p>
|
||||
Take note that you may also do that through the Jamrules file we put in our
|
||||
@@ -188,8 +189,8 @@ set PYTHON_VERSION=2.2
|
||||
instructions</a> you can follow.
|
||||
</p>
|
||||
<p>
|
||||
Now we are ready... Be sure to <tt class="literal">cd</tt> to <tt class="literal">libs/python/example/tutorial</tt>
|
||||
where the tutorial <tt class="literal">"hello.cpp"</tt> and the <tt class="literal">"Jamfile"</tt>
|
||||
Now we are ready... Be sure to <code class="literal">cd</code> to <code class="literal">libs/python/example/tutorial</code>
|
||||
where the tutorial <code class="literal">"hello.cpp"</code> and the <code class="literal">"Jamfile"</code>
|
||||
is situated.
|
||||
</p>
|
||||
<p>
|
||||
@@ -251,23 +252,29 @@ b and object bin\tutorial\hello.pyd\vc-7_1\debug\threading-multi\hello.exp
|
||||
<p>
|
||||
if you are on Unix.
|
||||
</p>
|
||||
<p><tt class="literal">boost_python.dll</tt> and <tt class="literal">hello.pyd</tt> can be
|
||||
found somewhere in your project's <tt class="literal">bin</tt> directory. After a
|
||||
successful build, you can just link in these DLLs with the Python interpreter.
|
||||
In Windows for example, you can simply put these libraries inside the directory
|
||||
where the Python executable is.
|
||||
<p>
|
||||
<code class="literal">boost_python.dll</code> and <code class="literal">hello.pyd</code> can be
|
||||
found somewhere in your project's <code class="literal">bin</code> directory. After a
|
||||
successful build, you make it possible for the system to find boost_python.dll
|
||||
or libboost_python.so (usually done with LD_LIBRARY_PATH, DYLD_LIBRARY_PATH,
|
||||
or some other variable on *nix and with PATH on Windows) and for Python to
|
||||
find the hello module (Done with PYTHONPATH on all systems.)
|
||||
</p>
|
||||
<p>
|
||||
You may now fire up Python and run our hello module:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="keyword">import</span> <span class="identifier">hello</span>
|
||||
<span class="special">>>></span> <span class="keyword">print</span> <span class="identifier">hello</span><span class="special">.</span><span class="identifier">greet</span><span class="special">()</span>
|
||||
<span class="identifier">hello</span><span class="special">,</span> <span class="identifier">world</span>
|
||||
</pre>
|
||||
<p></p>
|
||||
<div class="blockquote"><blockquote class="blockquote"><p><span class="bold"><b>There you go... Have fun!</b></span></p></blockquote></div>
|
||||
<p>
|
||||
</p>
|
||||
<div class="blockquote"><blockquote class="blockquote"><p>
|
||||
<span class="bold"><strong>There you go... Have fun!</strong></span>
|
||||
</p></blockquote></div>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"></td>
|
||||
|
||||
@@ -3,15 +3,15 @@
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
||||
<title>Iterators</title>
|
||||
<link rel="stylesheet" href="../boostbook.css" type="text/css">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
|
||||
<link rel="start" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="up" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="prev" href="embedding.html" title="Embedding">
|
||||
<link rel="next" href="exception.html" title=" Exception Translation">
|
||||
<link rel="next" href="exception.html" title="Exception Translation">
|
||||
</head>
|
||||
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||||
<table cellpadding="2" width="100%">
|
||||
<td valign="top"><img alt="boost.png (6897 bytes)" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td align="center"><a href="../../../../../../../index.htm">Home</a></td>
|
||||
<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td>
|
||||
<td align="center"><a href="../../../../../../../people/people.htm">People</a></td>
|
||||
@@ -26,10 +26,12 @@
|
||||
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
|
||||
<a name="python.iterators"></a>Iterators</h2></div></div></div>
|
||||
<p>
|
||||
IteratorsIn C++, and STL in particular, we see iterators everywhere. Python
|
||||
also has iterators, but these are two very different beasts.
|
||||
In C++, and STL in particular, we see iterators everywhere. Python also has
|
||||
iterators, but these are two very different beasts.
|
||||
</p>
|
||||
<p>
|
||||
<span class="bold"><strong>C++ iterators:</strong></span>
|
||||
</p>
|
||||
<p><span class="bold"><b>C++ iterators:</b></span></p>
|
||||
<div class="itemizedlist"><ul type="disc">
|
||||
<li>
|
||||
C++ has 5 type categories (random-access, bidirectional, forward, input,
|
||||
@@ -42,7 +44,9 @@
|
||||
A pair of iterators is needed to represent a (first/last) range.
|
||||
</li>
|
||||
</ul></div>
|
||||
<p><span class="bold"><b>Python Iterators:</b></span></p>
|
||||
<p>
|
||||
<span class="bold"><strong>Python Iterators:</strong></span>
|
||||
</p>
|
||||
<div class="itemizedlist"><ul type="disc">
|
||||
<li>
|
||||
1 category (forward)
|
||||
@@ -55,10 +59,11 @@
|
||||
</li>
|
||||
</ul></div>
|
||||
<p>
|
||||
The typical Python iteration protocol: <tt class="literal"><span class="bold"><b>for y
|
||||
in x...</b></span></tt> is as follows:
|
||||
The typical Python iteration protocol: <code class="literal"><span class="bold"><strong>for y
|
||||
in x...</strong></span></code> is as follows:
|
||||
</p>
|
||||
<p>
|
||||
</p>
|
||||
<p></p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">iter</span> <span class="special">=</span> <span class="identifier">x</span><span class="special">.</span><span class="identifier">__iter__</span><span class="special">()</span> <span class="comment"># get iterator
|
||||
</span><span class="keyword">try</span><span class="special">:</span>
|
||||
@@ -69,10 +74,11 @@
|
||||
</span></pre>
|
||||
<p>
|
||||
Boost.Python provides some mechanisms to make C++ iterators play along nicely
|
||||
as Python iterators. What we need to do is to produce appropriate <tt class="computeroutput"><span class="identifier">__iter__</span></tt> function from C++ iterators that
|
||||
as Python iterators. What we need to do is to produce appropriate <code class="computeroutput"><span class="identifier">__iter__</span></code> function from C++ iterators that
|
||||
is compatible with the Python iteration protocol. For example:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">object</span> <span class="identifier">get_iterator</span> <span class="special">=</span> <span class="identifier">iterator</span><span class="special"><</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="special">>();</span>
|
||||
<span class="identifier">object</span> <span class="identifier">iter</span> <span class="special">=</span> <span class="identifier">get_iterator</span><span class="special">(</span><span class="identifier">v</span><span class="special">);</span>
|
||||
@@ -84,7 +90,9 @@
|
||||
<pre class="programlisting">
|
||||
<span class="special">.</span><span class="identifier">def</span><span class="special">(</span><span class="string">"__iter__"</span><span class="special">,</span> <span class="identifier">iterator</span><span class="special"><</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="special">>())</span>
|
||||
</pre>
|
||||
<p><span class="bold"><b>range</b></span></p>
|
||||
<p>
|
||||
<span class="bold"><strong>range</strong></span>
|
||||
</p>
|
||||
<p>
|
||||
We can create a Python savvy iterator using the range function:
|
||||
</p>
|
||||
@@ -110,19 +118,22 @@
|
||||
adaptable function object (use Target parameter)
|
||||
</li>
|
||||
</ul></div>
|
||||
<p><span class="bold"><b>iterator</b></span></p>
|
||||
<p>
|
||||
<span class="bold"><strong>iterator</strong></span>
|
||||
</p>
|
||||
<div class="itemizedlist"><ul type="disc"><li>
|
||||
iterator<T, Policies>()
|
||||
</li></ul></div>
|
||||
<p>
|
||||
Given a container <tt class="literal">T</tt>, iterator is a shortcut that simply
|
||||
calls <tt class="literal">range</tt> with &T::begin, &T::end.
|
||||
Given a container <code class="literal">T</code>, iterator is a shortcut that simply
|
||||
calls <code class="literal">range</code> with &T::begin, &T::end.
|
||||
</p>
|
||||
<p>
|
||||
Let's put this into action... Here's an example from some hypothetical bogon
|
||||
Particle accelerator code:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">f</span> <span class="special">=</span> <span class="identifier">Field</span><span class="special">()</span>
|
||||
<span class="keyword">for</span> <span class="identifier">x</span> <span class="keyword">in</span> <span class="identifier">f</span><span class="special">.</span><span class="identifier">pions</span><span class="special">:</span>
|
||||
@@ -133,21 +144,25 @@
|
||||
<p>
|
||||
Now, our C++ Wrapper:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">class_</span><span class="special"><</span><span class="identifier">F</span><span class="special">>(</span><span class="string">"Field"</span><span class="special">)</span>
|
||||
<span class="special">.</span><span class="identifier">property</span><span class="special">(</span><span class="string">"pions"</span><span class="special">,</span> <span class="identifier">range</span><span class="special">(&</span><span class="identifier">F</span><span class="special">::</span><span class="identifier">p_begin</span><span class="special">,</span> <span class="special">&</span><span class="identifier">F</span><span class="special">::</span><span class="identifier">p_end</span><span class="special">))</span>
|
||||
<span class="special">.</span><span class="identifier">property</span><span class="special">(</span><span class="string">"bogons"</span><span class="special">,</span> <span class="identifier">range</span><span class="special">(&</span><span class="identifier">F</span><span class="special">::</span><span class="identifier">b_begin</span><span class="special">,</span> <span class="special">&</span><span class="identifier">F</span><span class="special">::</span><span class="identifier">b_end</span><span class="special">));</span>
|
||||
</pre>
|
||||
<p><span class="bold"><b>stl_input_iterator</b></span></p>
|
||||
<p>
|
||||
<span class="bold"><strong>stl_input_iterator</strong></span>
|
||||
</p>
|
||||
<p>
|
||||
So far, we have seen how to expose C++ iterators and ranges to Python. Sometimes
|
||||
we wish to go the other way, though: we'd like to pass a Python sequence to
|
||||
an STL algorithm or use it to initialize an STL container. We need to make
|
||||
a Python iterator look like an STL iterator. For that, we use <tt class="computeroutput"><span class="identifier">stl_input_iterator</span><span class="special"><></span></tt>.
|
||||
Consider how we might implement a function that exposes <tt class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">list</span><span class="special"><</span><span class="keyword">int</span><span class="special">>::</span><span class="identifier">assign</span><span class="special">()</span></tt> to Python:
|
||||
a Python iterator look like an STL iterator. For that, we use <code class="computeroutput"><span class="identifier">stl_input_iterator</span><span class="special"><></span></code>.
|
||||
Consider how we might implement a function that exposes <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">list</span><span class="special"><</span><span class="keyword">int</span><span class="special">>::</span><span class="identifier">assign</span><span class="special">()</span></code> to Python:
|
||||
</p>
|
||||
<p>
|
||||
</p>
|
||||
<p></p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">></span>
|
||||
<span class="keyword">void</span> <span class="identifier">list_assign</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">list</span><span class="special"><</span><span class="identifier">T</span><span class="special">>&</span> <span class="identifier">l</span><span class="special">,</span> <span class="identifier">object</span> <span class="identifier">o</span><span class="special">)</span> <span class="special">{</span>
|
||||
@@ -163,10 +178,11 @@
|
||||
</span> <span class="special">;</span>
|
||||
</pre>
|
||||
<p>
|
||||
Now in Python, we can assign any integer sequence to <tt class="computeroutput"><span class="identifier">list_int</span></tt>
|
||||
Now in Python, we can assign any integer sequence to <code class="computeroutput"><span class="identifier">list_int</span></code>
|
||||
objects:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">x</span> <span class="special">=</span> <span class="identifier">list_int</span><span class="special">();</span>
|
||||
<span class="identifier">x</span><span class="special">.</span><span class="identifier">assign</span><span class="special">([</span><span class="number">1</span><span class="special">,</span><span class="number">2</span><span class="special">,</span><span class="number">3</span><span class="special">,</span><span class="number">4</span><span class="special">,</span><span class="number">5</span><span class="special">])</span>
|
||||
|
||||
@@ -1,9 +1,9 @@
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
||||
<title> Object Interface</title>
|
||||
<title>Object Interface</title>
|
||||
<link rel="stylesheet" href="../boostbook.css" type="text/css">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
|
||||
<link rel="start" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="up" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="prev" href="functions.html" title="Functions">
|
||||
@@ -11,7 +11,7 @@
|
||||
</head>
|
||||
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||||
<table cellpadding="2" width="100%">
|
||||
<td valign="top"><img alt="boost.png (6897 bytes)" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td align="center"><a href="../../../../../../../index.htm">Home</a></td>
|
||||
<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td>
|
||||
<td align="center"><a href="../../../../../../../people/people.htm">People</a></td>
|
||||
@@ -32,33 +32,36 @@
|
||||
<dt><span class="section"><a href="object.html#python.enums">Enums</a></span></dt>
|
||||
</dl></div>
|
||||
<p>
|
||||
Object InterfacePython is dynamically typed, unlike C++ which is statically
|
||||
typed. Python variables may hold an integer, a float, list, dict, tuple, str,
|
||||
long etc., among other things. In the viewpoint of Boost.Python and C++, these
|
||||
Pythonic variables are just instances of class <tt class="literal">object</tt>. We
|
||||
shall see in this chapter how to deal with Python objects.
|
||||
Python is dynamically typed, unlike C++ which is statically typed. Python variables
|
||||
may hold an integer, a float, list, dict, tuple, str, long etc., among other
|
||||
things. In the viewpoint of Boost.Python and C++, these Pythonic variables
|
||||
are just instances of class <code class="literal">object</code>. We shall see in this
|
||||
chapter how to deal with Python objects.
|
||||
</p>
|
||||
<p>
|
||||
As mentioned, one of the goals of Boost.Python is to provide a bidirectional
|
||||
mapping between C++ and Python while maintaining the Python feel. Boost.Python
|
||||
C++ <tt class="literal">object</tt>s are as close as possible to Python. This should
|
||||
C++ <code class="literal">object</code>s are as close as possible to Python. This should
|
||||
minimize the learning curve significantly.
|
||||
</p>
|
||||
<p><span class="inlinemediaobject"><img src="../images/python.png"></span></p>
|
||||
<p>
|
||||
<span class="inlinemediaobject"><img src="../images/python.png" alt="python"></span>
|
||||
</p>
|
||||
<div class="section" lang="en">
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.basic_interface"></a>Basic Interface</h3></div></div></div>
|
||||
<p>
|
||||
Basic InterfaceClass <tt class="literal">object</tt> wraps <tt class="literal">PyObject*</tt>.
|
||||
All the intricacies of dealing with <tt class="literal">PyObject</tt>s such as
|
||||
managing reference counting are handled by the <tt class="literal">object</tt>
|
||||
class. C++ object interoperability is seamless. Boost.Python C++ <tt class="literal">object</tt>s
|
||||
Class <code class="literal">object</code> wraps <code class="literal">PyObject*</code>. All the
|
||||
intricacies of dealing with <code class="literal">PyObject</code>s such as managing
|
||||
reference counting are handled by the <code class="literal">object</code> class. C++
|
||||
object interoperability is seamless. Boost.Python C++ <code class="literal">object</code>s
|
||||
can in fact be explicitly constructed from any C++ object.
|
||||
</p>
|
||||
<p>
|
||||
To illustrate, this Python code snippet:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">def</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">x</span><span class="special">,</span> <span class="identifier">y</span><span class="special">):</span>
|
||||
<span class="keyword">if</span> <span class="special">(</span><span class="identifier">y</span> <span class="special">==</span> <span class="string">'foo'</span><span class="special">):</span>
|
||||
@@ -73,7 +76,8 @@
|
||||
<p>
|
||||
Can be rewritten in C++ using Boost.Python facilities this way:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">object</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">object</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">object</span> <span class="identifier">y</span><span class="special">)</span> <span class="special">{</span>
|
||||
<span class="keyword">if</span> <span class="special">(</span><span class="identifier">y</span> <span class="special">==</span> <span class="string">"foo"</span><span class="special">)</span>
|
||||
@@ -95,8 +99,8 @@
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.derived_object_types"></a>Derived Object types</h3></div></div></div>
|
||||
<p>
|
||||
Derived Object typesBoost.Python comes with a set of derived <tt class="literal">object</tt>
|
||||
types corresponding to that of Python's:
|
||||
Boost.Python comes with a set of derived <code class="literal">object</code> types
|
||||
corresponding to that of Python's:
|
||||
</p>
|
||||
<div class="itemizedlist"><ul type="disc">
|
||||
<li>
|
||||
@@ -119,31 +123,32 @@
|
||||
</li>
|
||||
</ul></div>
|
||||
<p>
|
||||
These derived <tt class="literal">object</tt> types act like real Python types.
|
||||
These derived <code class="literal">object</code> types act like real Python types.
|
||||
For instance:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">str</span><span class="special">(</span><span class="number">1</span><span class="special">)</span> <span class="special">==></span> <span class="string">"1"</span>
|
||||
</pre>
|
||||
<p>
|
||||
Wherever appropriate, a particular derived <tt class="literal">object</tt> has
|
||||
corresponding Python type's methods. For instance, <tt class="literal">dict</tt>
|
||||
has a <tt class="literal">keys()</tt> method:
|
||||
Wherever appropriate, a particular derived <code class="literal">object</code> has
|
||||
corresponding Python type's methods. For instance, <code class="literal">dict</code>
|
||||
has a <code class="literal">keys()</code> method:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">d</span><span class="special">.</span><span class="identifier">keys</span><span class="special">()</span>
|
||||
</pre>
|
||||
<p><tt class="literal">make_tuple</tt> is provided for declaring <span class="emphasis"><em>tuple literals</em></span>.
|
||||
<p>
|
||||
<code class="literal">make_tuple</code> is provided for declaring <span class="emphasis"><em>tuple literals</em></span>.
|
||||
Example:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">make_tuple</span><span class="special">(</span><span class="number">123</span><span class="special">,</span> <span class="char">'D'</span><span class="special">,</span> <span class="string">"Hello, World"</span><span class="special">,</span> <span class="number">0.0</span><span class="special">);</span>
|
||||
</pre>
|
||||
<p>
|
||||
In C++, when Boost.Python <tt class="literal">object</tt>s are used as arguments
|
||||
In C++, when Boost.Python <code class="literal">object</code>s are used as arguments
|
||||
to functions, subtype matching is required. For example, when a function
|
||||
<tt class="literal">f</tt>, as declared below, is wrapped, it will only accept
|
||||
instances of Python's <tt class="literal">str</tt> type and subtypes.
|
||||
<code class="literal">f</code>, as declared below, is wrapped, it will only accept
|
||||
instances of Python's <code class="literal">str</code> type and subtypes.
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">str</span> <span class="identifier">name</span><span class="special">)</span>
|
||||
@@ -167,16 +172,15 @@
|
||||
<span class="identifier">object</span> <span class="identifier">msg</span> <span class="special">=</span> <span class="string">"%s is bigger than %s"</span> <span class="special">%</span> <span class="identifier">make_tuple</span><span class="special">(</span><span class="identifier">NAME</span><span class="special">,</span><span class="identifier">name</span><span class="special">);</span>
|
||||
</pre>
|
||||
<p>
|
||||
Demonstrates that you can write the C++ equivalent of <tt class="literal">"format"
|
||||
% x,y,z</tt> in Python, which is useful since there's no easy way to
|
||||
Demonstrates that you can write the C++ equivalent of <code class="literal">"format"
|
||||
% x,y,z</code> in Python, which is useful since there's no easy way to
|
||||
do that in std C++.
|
||||
</p>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/alert.png"></span> <span class="bold"><b>Beware</b></span> the common pitfall of forgetting that
|
||||
the constructors of most of Python's mutable types make copies, just
|
||||
as in Python. </td></tr></tbody>
|
||||
<tbody><tr><td class="blurb"> <span class="inlinemediaobject"><img src="../images/alert.png" alt="alert"></span> <span class="bold"><strong>Beware</strong></span> the
|
||||
common pitfall of forgetting that the constructors of most of Python's
|
||||
mutable types make copies, just as in Python. </td></tr></tbody>
|
||||
</table></div>
|
||||
<p>
|
||||
Python:
|
||||
@@ -192,12 +196,12 @@
|
||||
<span class="identifier">dict</span> <span class="identifier">d</span><span class="special">(</span><span class="identifier">x</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"__dict__"</span><span class="special">));</span> <span class="comment">// copies x.__dict__
|
||||
</span><span class="identifier">d</span><span class="special">[</span><span class="char">'whatever'</span><span class="special">]</span> <span class="special">=</span> <span class="number">3</span><span class="special">;</span> <span class="comment">// modifies the copy
|
||||
</span></pre>
|
||||
<a name="derived_object_types.class__lt_t_gt__as_objects"></a><h2>
|
||||
<a name="id455806"></a>
|
||||
<a name="derived_object_types.class__lt_t_gt__as_objects"></a><h3>
|
||||
<a name="id3149441"></a>
|
||||
class_<T> as objects
|
||||
</h2>
|
||||
</h3>
|
||||
<p>
|
||||
Due to the dynamic nature of Boost.Python objects, any <tt class="literal">class_<T></tt>
|
||||
Due to the dynamic nature of Boost.Python objects, any <code class="literal">class_<T></code>
|
||||
may also be one of these types! The following code snippet wraps the class
|
||||
(type) object.
|
||||
</p>
|
||||
@@ -218,16 +222,16 @@
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.extracting_c___objects"></a>Extracting C++ objects</h3></div></div></div>
|
||||
<p>
|
||||
Extracting C++ objectsAt some point, we will need to get C++ values out of
|
||||
object instances. This can be achieved with the <tt class="literal">extract<T></tt>
|
||||
function. Consider the following:
|
||||
At some point, we will need to get C++ values out of object instances. This
|
||||
can be achieved with the <code class="literal">extract<T></code> function. Consider
|
||||
the following:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">double</span> <span class="identifier">x</span> <span class="special">=</span> <span class="identifier">o</span><span class="special">.</span><span class="identifier">attr</span><span class="special">(</span><span class="string">"length"</span><span class="special">);</span> <span class="comment">// compile error
|
||||
</span></pre>
|
||||
<p>
|
||||
In the code above, we got a compiler error because Boost.Python <tt class="literal">object</tt>
|
||||
can't be implicitly converted to <tt class="literal">double</tt>s. Instead, what
|
||||
In the code above, we got a compiler error because Boost.Python <code class="literal">object</code>
|
||||
can't be implicitly converted to <code class="literal">double</code>s. Instead, what
|
||||
we wanted to do above can be achieved by writing:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
@@ -237,14 +241,14 @@
|
||||
</pre>
|
||||
<p>
|
||||
The first line attempts to extract the "length" attribute of the
|
||||
Boost.Python <tt class="literal">object</tt>. The second line attempts to <span class="emphasis"><em>extract</em></span>
|
||||
the <tt class="literal">Vec2</tt> object from held by the Boost.Python <tt class="literal">object</tt>.
|
||||
Boost.Python <code class="literal">object</code>. The second line attempts to <span class="emphasis"><em>extract</em></span>
|
||||
the <code class="literal">Vec2</code> object from held by the Boost.Python <code class="literal">object</code>.
|
||||
</p>
|
||||
<p>
|
||||
Take note that we said "attempt to" above. What if the Boost.Python
|
||||
<tt class="literal">object</tt> does not really hold a <tt class="literal">Vec2</tt>
|
||||
<code class="literal">object</code> does not really hold a <code class="literal">Vec2</code>
|
||||
type? This is certainly a possibility considering the dynamic nature of Python
|
||||
<tt class="literal">object</tt>s. To be on the safe side, if the C++ type can't
|
||||
<code class="literal">object</code>s. To be on the safe side, if the C++ type can't
|
||||
be extracted, an appropriate exception is thrown. To avoid an exception,
|
||||
we need to test for extractibility:
|
||||
</p>
|
||||
@@ -253,8 +257,8 @@
|
||||
<span class="keyword">if</span> <span class="special">(</span><span class="identifier">x</span><span class="special">.</span><span class="identifier">check</span><span class="special">())</span> <span class="special">{</span>
|
||||
<span class="identifier">Vec2</span><span class="special">&</span> <span class="identifier">v</span> <span class="special">=</span> <span class="identifier">x</span><span class="special">();</span> <span class="special">...</span>
|
||||
</pre>
|
||||
<p><span class="inlinemediaobject"><img src="../images/tip.png"></span>
|
||||
The astute reader might have noticed that the <tt class="literal">extract<T></tt>
|
||||
<p>
|
||||
<span class="inlinemediaobject"><img src="../images/tip.png" alt="tip"></span> The astute reader might have noticed that the <code class="literal">extract<T></code>
|
||||
facility in fact solves the mutable copying problem:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
@@ -266,12 +270,12 @@
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.enums"></a>Enums</h3></div></div></div>
|
||||
<p>
|
||||
EnumsBoost.Python has a nifty facility to capture and wrap C++ enums. While
|
||||
Python has no <tt class="literal">enum</tt> type, we'll often want to expose our
|
||||
C++ enums to Python as an <tt class="literal">int</tt>. Boost.Python's enum facility
|
||||
makes this easy while taking care of the proper conversions from Python's
|
||||
dynamic typing to C++'s strong static typing (in C++, ints cannot be implicitly
|
||||
converted to enums). To illustrate, given a C++ enum:
|
||||
Boost.Python has a nifty facility to capture and wrap C++ enums. While Python
|
||||
has no <code class="literal">enum</code> type, we'll often want to expose our C++ enums
|
||||
to Python as an <code class="literal">int</code>. Boost.Python's enum facility makes
|
||||
this easy while taking care of the proper conversions from Python's dynamic
|
||||
typing to C++'s strong static typing (in C++, ints cannot be implicitly converted
|
||||
to enums). To illustrate, given a C++ enum:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">enum</span> <span class="identifier">choice</span> <span class="special">{</span> <span class="identifier">red</span><span class="special">,</span> <span class="identifier">blue</span> <span class="special">};</span>
|
||||
@@ -287,22 +291,23 @@
|
||||
</pre>
|
||||
<p>
|
||||
can be used to expose to Python. The new enum type is created in the current
|
||||
<tt class="literal">scope()</tt>, which is usually the current module. The snippet
|
||||
above creates a Python class derived from Python's <tt class="literal">int</tt>
|
||||
<code class="literal">scope()</code>, which is usually the current module. The snippet
|
||||
above creates a Python class derived from Python's <code class="literal">int</code>
|
||||
type which is associated with the C++ type passed as its first parameter.
|
||||
</p>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/note.png"></span> <span class="bold"><b>what is a scope?</b></span><br><br> The scope is a
|
||||
class that has an associated global Python object which controls the
|
||||
Python namespace in which new extension classes and wrapped functions
|
||||
will be defined as attributes. Details can be found <a href="../../../../v2/scope.html" target="_top">here</a>.</td></tr></tbody>
|
||||
<tbody><tr><td class="blurb"> <span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> <span class="bold"><strong>what is a scope?</strong></span><br>
|
||||
<br> The scope is a class that has an associated global Python object
|
||||
which controls the Python namespace in which new extension classes
|
||||
and wrapped functions will be defined as attributes. Details can be
|
||||
found <a href="../../../../v2/scope.html" target="_top">here</a>.</td></tr></tbody>
|
||||
</table></div>
|
||||
<p>
|
||||
You can access those values in Python as
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="identifier">my_module</span><span class="special">.</span><span class="identifier">choice</span><span class="special">.</span><span class="identifier">red</span>
|
||||
<span class="identifier">my_module</span><span class="special">.</span><span class="identifier">choice</span><span class="special">.</span><span class="identifier">red</span>
|
||||
@@ -311,7 +316,8 @@
|
||||
where my_module is the module where the enum is declared. You can also create
|
||||
a new scope around a class:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="identifier">scope</span> <span class="identifier">in_X</span> <span class="special">=</span> <span class="identifier">class_</span><span class="special"><</span><span class="identifier">X</span><span class="special">>(</span><span class="string">"X"</span><span class="special">)</span>
|
||||
<span class="special">.</span><span class="identifier">def</span><span class="special">(</span> <span class="special">...</span> <span class="special">)</span>
|
||||
|
||||
@@ -1,16 +1,16 @@
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
||||
<title> General Techniques</title>
|
||||
<title>General Techniques</title>
|
||||
<link rel="stylesheet" href="../boostbook.css" type="text/css">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.72.0">
|
||||
<link rel="start" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="up" href="../index.html" title="Chapter 1. python 1.0">
|
||||
<link rel="prev" href="exception.html" title=" Exception Translation">
|
||||
<link rel="prev" href="exception.html" title="Exception Translation">
|
||||
</head>
|
||||
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||||
<table cellpadding="2" width="100%">
|
||||
<td valign="top"><img alt="boost.png (6897 bytes)" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td>
|
||||
<td align="center"><a href="../../../../../../../index.htm">Home</a></td>
|
||||
<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td>
|
||||
<td align="center"><a href="../../../../../../../people/people.htm">People</a></td>
|
||||
@@ -30,16 +30,16 @@
|
||||
<dt><span class="section"><a href="techniques.html#python.reducing_compiling_time">Reducing Compiling Time</a></span></dt>
|
||||
</dl></div>
|
||||
<p>
|
||||
General TechniquesHere are presented some useful techniques that you can use
|
||||
while wrapping code with Boost.Python.
|
||||
Here are presented some useful techniques that you can use while wrapping code
|
||||
with Boost.Python.
|
||||
</p>
|
||||
<div class="section" lang="en">
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.creating_packages"></a>Creating Packages</h3></div></div></div>
|
||||
<p>
|
||||
Creating PackagesA Python package is a collection of modules that provide
|
||||
to the user a certain functionality. If you're not familiar on how to create
|
||||
packages, a good introduction to them is provided in the <a href="http://www.python.org/doc/current/tut/node8.html" target="_top">Python
|
||||
A Python package is a collection of modules that provide to the user a certain
|
||||
functionality. If you're not familiar on how to create packages, a good introduction
|
||||
to them is provided in the <a href="http://www.python.org/doc/current/tut/node8.html" target="_top">Python
|
||||
Tutorial</a>.
|
||||
</p>
|
||||
<p>
|
||||
@@ -50,7 +50,7 @@
|
||||
<p>
|
||||
We have a C++ library that works with sounds: reading and writing various
|
||||
formats, applying filters to the sound data, etc. It is named (conveniently)
|
||||
<tt class="literal">sounds</tt>. Our library already has a neat C++ namespace hierarchy,
|
||||
<code class="literal">sounds</code>. Our library already has a neat C++ namespace hierarchy,
|
||||
like so:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
@@ -93,17 +93,15 @@
|
||||
<span class="special">}</span>
|
||||
</pre>
|
||||
<p>
|
||||
Compiling these files will generate the following Python extensions: <tt class="literal">core.pyd</tt>,
|
||||
<tt class="literal">io.pyd</tt> and <tt class="literal">filters.pyd</tt>.
|
||||
Compiling these files will generate the following Python extensions: <code class="literal">core.pyd</code>,
|
||||
<code class="literal">io.pyd</code> and <code class="literal">filters.pyd</code>.
|
||||
</p>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/note.png"></span>
|
||||
The extension <tt class="literal">.pyd</tt> is used for python extension
|
||||
modules, which are just shared libraries. Using the default for your
|
||||
system, like <tt class="literal">.so</tt> for Unix and <tt class="literal">.dll</tt>
|
||||
for Windows, works just as well.</td></tr></tbody>
|
||||
<tbody><tr><td class="blurb"> <span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> The extension <code class="literal">.pyd</code> is used
|
||||
for python extension modules, which are just shared libraries. Using
|
||||
the default for your system, like <code class="literal">.so</code> for Unix and
|
||||
<code class="literal">.dll</code> for Windows, works just as well.</td></tr></tbody>
|
||||
</table></div>
|
||||
<p>
|
||||
Now, we create this directory structure for our Python package:
|
||||
@@ -115,16 +113,17 @@
|
||||
io.pyd
|
||||
</pre>
|
||||
<p>
|
||||
The file <tt class="literal">__init__.py</tt> is what tells Python that the directory
|
||||
<tt class="literal">sounds/</tt> is actually a Python package. It can be a empty
|
||||
The file <code class="literal">__init__.py</code> is what tells Python that the directory
|
||||
<code class="literal">sounds/</code> is actually a Python package. It can be a empty
|
||||
file, but can also perform some magic, that will be shown later.
|
||||
</p>
|
||||
<p>
|
||||
Now our package is ready. All the user has to do is put <tt class="literal">sounds</tt>
|
||||
Now our package is ready. All the user has to do is put <code class="literal">sounds</code>
|
||||
into his <a href="http://www.python.org/doc/current/tut/node8.html#SECTION008110000000000000000" target="_top">PYTHONPATH</a>
|
||||
and fire up the interpreter:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="keyword">import</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">io</span>
|
||||
<span class="special">>>></span> <span class="keyword">import</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">filters</span>
|
||||
@@ -146,7 +145,8 @@
|
||||
If we want this flexibility, we will have to complicate our package hierarchy
|
||||
a little. First, we will have to change the name of the extension modules:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="comment">/* file core.cpp */</span>
|
||||
<span class="identifier">BOOST_PYTHON_MODULE</span><span class="special">(</span><span class="identifier">_core</span><span class="special">)</span>
|
||||
@@ -157,7 +157,7 @@
|
||||
</pre>
|
||||
<p>
|
||||
Note that we added an underscore to the module name. The filename will have
|
||||
to be changed to <tt class="literal">_core.pyd</tt> as well, and we do the same
|
||||
to be changed to <code class="literal">_core.pyd</code> as well, and we do the same
|
||||
to the other extension modules. Now, we change our package hierarchy like
|
||||
so:
|
||||
</p>
|
||||
@@ -178,17 +178,18 @@
|
||||
to each one. But if we leave it that way, the user will have to access the
|
||||
functions in the core module with this syntax:
|
||||
</p>
|
||||
<p></p>
|
||||
<p>
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="keyword">import</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">core</span><span class="special">.</span><span class="identifier">_core</span>
|
||||
<span class="special">>>></span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">core</span><span class="special">.</span><span class="identifier">_core</span><span class="special">.</span><span class="identifier">foo</span><span class="special">(...)</span>
|
||||
</pre>
|
||||
<p>
|
||||
which is not what we want. But here enters the <tt class="literal">__init__.py</tt>
|
||||
magic: everything that is brought to the <tt class="literal">__init__.py</tt> namespace
|
||||
which is not what we want. But here enters the <code class="literal">__init__.py</code>
|
||||
magic: everything that is brought to the <code class="literal">__init__.py</code> namespace
|
||||
can be accessed directly by the user. So, all we have to do is bring the
|
||||
entire namespace from <tt class="literal">_core.pyd</tt> to <tt class="literal">core/__init__.py</tt>.
|
||||
So add this line of code to <tt class="literal">sounds<span class="emphasis"><em>core</em></span>__init__.py</tt>:
|
||||
entire namespace from <code class="literal">_core.pyd</code> to <code class="literal">core/__init__.py</code>.
|
||||
So add this line of code to <code class="literal">sounds<span class="emphasis"><em>core</em></span>__init__.py</code>:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">from</span> <span class="identifier">_core</span> <span class="keyword">import</span> <span class="special">*</span>
|
||||
@@ -205,10 +206,10 @@
|
||||
with the additional benefit that we can easily add pure Python functions
|
||||
to any module, in a way that the user can't tell the difference between a
|
||||
C++ function and a Python function. Let's add a <span class="emphasis"><em>pure</em></span>
|
||||
Python function, <tt class="literal">echo_noise</tt>, to the <tt class="literal">filters</tt>
|
||||
package. This function applies both the <tt class="literal">echo</tt> and <tt class="literal">noise</tt>
|
||||
filters in sequence in the given <tt class="literal">sound</tt> object. We create
|
||||
a file named <tt class="literal">sounds/filters/echo_noise.py</tt> and code our
|
||||
Python function, <code class="literal">echo_noise</code>, to the <code class="literal">filters</code>
|
||||
package. This function applies both the <code class="literal">echo</code> and <code class="literal">noise</code>
|
||||
filters in sequence in the given <code class="literal">sound</code> object. We create
|
||||
a file named <code class="literal">sounds/filters/echo_noise.py</code> and code our
|
||||
function:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
@@ -219,14 +220,14 @@
|
||||
<span class="keyword">return</span> <span class="identifier">s</span>
|
||||
</pre>
|
||||
<p>
|
||||
Next, we add this line to <tt class="literal">sounds<span class="emphasis"><em>filters</em></span>__init__.py</tt>:
|
||||
Next, we add this line to <code class="literal">sounds<span class="emphasis"><em>filters</em></span>__init__.py</code>:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">from</span> <span class="identifier">echo_noise</span> <span class="keyword">import</span> <span class="identifier">echo_noise</span>
|
||||
</pre>
|
||||
<p>
|
||||
And that's it. The user now accesses this function like any other function
|
||||
from the <tt class="literal">filters</tt> package:
|
||||
from the <code class="literal">filters</code> package:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="keyword">import</span> <span class="identifier">sounds</span><span class="special">.</span><span class="identifier">filters</span>
|
||||
@@ -237,8 +238,8 @@
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.extending_wrapped_objects_in_python"></a>Extending Wrapped Objects in Python</h3></div></div></div>
|
||||
<p>
|
||||
Extending Wrapped Objects in PythonThanks to Python's flexibility, you can
|
||||
easily add new methods to a class, even after it was already created:
|
||||
Thanks to Python's flexibility, you can easily add new methods to a class,
|
||||
even after it was already created:
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
<span class="special">>>></span> <span class="keyword">class</span> <span class="identifier">C</span><span class="special">(</span><span class="identifier">object</span><span class="special">):</span> <span class="keyword">pass</span>
|
||||
@@ -256,12 +257,14 @@
|
||||
<span class="identifier">A</span> <span class="identifier">C</span> <span class="identifier">instance</span><span class="special">!</span>
|
||||
</pre>
|
||||
<p>
|
||||
Yes, Python rox. <span class="inlinemediaobject"><img src="../images/smiley.png"></span></p>
|
||||
Yes, Python rox. <span class="inlinemediaobject"><img src="../images/smiley.png" alt="smiley"></span>
|
||||
</p>
|
||||
<p>
|
||||
We can do the same with classes that were wrapped with Boost.Python. Suppose
|
||||
we have a class <tt class="literal">point</tt> in C++:
|
||||
we have a class <code class="literal">point</code> in C++:
|
||||
</p>
|
||||
<p>
|
||||
</p>
|
||||
<p></p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">class</span> <span class="identifier">point</span> <span class="special">{...};</span>
|
||||
|
||||
@@ -272,9 +275,10 @@
|
||||
</pre>
|
||||
<p>
|
||||
If we are using the technique from the previous session, <a href="techniques.html#python.creating_packages" title="Creating Packages">Creating
|
||||
Packages</a>, we can code directly into <tt class="literal">geom/__init__.py</tt>:
|
||||
Packages</a>, we can code directly into <code class="literal">geom/__init__.py</code>:
|
||||
</p>
|
||||
<p>
|
||||
</p>
|
||||
<p></p>
|
||||
<pre class="programlisting">
|
||||
<span class="keyword">from</span> <span class="identifier">_geom</span> <span class="keyword">import</span> <span class="special">*</span>
|
||||
|
||||
@@ -285,7 +289,8 @@
|
||||
<span class="comment"># now we turn it into a member function
|
||||
</span><span class="identifier">point</span><span class="special">.</span><span class="identifier">__str__</span> <span class="special">=</span> <span class="identifier">point_str</span>
|
||||
</pre>
|
||||
<p><span class="bold"><b>All</b></span> point instances created from C++ will
|
||||
<p>
|
||||
<span class="bold"><strong>All</strong></span> point instances created from C++ will
|
||||
also have this member function! This technique has several advantages:
|
||||
</p>
|
||||
<div class="itemizedlist"><ul type="disc">
|
||||
@@ -357,12 +362,13 @@
|
||||
<div class="titlepage"><div><div><h3 class="title">
|
||||
<a name="python.reducing_compiling_time"></a>Reducing Compiling Time</h3></div></div></div>
|
||||
<p>
|
||||
Reducing Compiling TimeIf you have ever exported a lot of classes, you know
|
||||
that it takes quite a good time to compile the Boost.Python wrappers. Plus
|
||||
the memory consumption can easily become too high. If this is causing you
|
||||
problems, you can split the class_ definitions in multiple files:
|
||||
If you have ever exported a lot of classes, you know that it takes quite
|
||||
a good time to compile the Boost.Python wrappers. Plus the memory consumption
|
||||
can easily become too high. If this is causing you problems, you can split
|
||||
the class_ definitions in multiple files:
|
||||
</p>
|
||||
<p>
|
||||
</p>
|
||||
<p></p>
|
||||
<pre class="programlisting">
|
||||
<span class="comment">/* file point.cpp */</span>
|
||||
<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">point</span><span class="special">.</span><span class="identifier">h</span><span class="special">></span>
|
||||
@@ -383,7 +389,7 @@
|
||||
<span class="special">}</span>
|
||||
</pre>
|
||||
<p>
|
||||
Now you create a file <tt class="literal">main.cpp</tt>, which contains the <tt class="literal">BOOST_PYTHON_MODULE</tt>
|
||||
Now you create a file <code class="literal">main.cpp</code>, which contains the <code class="literal">BOOST_PYTHON_MODULE</code>
|
||||
macro, and call the various export functions inside it.
|
||||
</p>
|
||||
<pre class="programlisting">
|
||||
@@ -421,19 +427,16 @@
|
||||
</p>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/note.png"></span>
|
||||
If you're exporting your classes with <a href="../../../../../pyste/index.html" target="_top">Pyste</a>,
|
||||
take a look at the <tt class="literal">--multiple</tt> option, that generates
|
||||
<tbody><tr><td class="blurb"> <span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> If you're exporting your classes with <a href="../../../../../pyste/index.html" target="_top">Pyste</a>,
|
||||
take a look at the <code class="literal">--multiple</code> option, that generates
|
||||
the wrappers in various files as demonstrated here.</td></tr></tbody>
|
||||
</table></div>
|
||||
<div class="informaltable"><table class="table">
|
||||
<colgroup><col></colgroup>
|
||||
<tbody><tr><td class="blurb">
|
||||
<span class="inlinemediaobject"><img src="../images/note.png"></span>
|
||||
This method is useful too if you are getting the error message <span class="emphasis"><em>"fatal
|
||||
error C1204:Compiler limit:internal structure overflow"</em></span>
|
||||
when compiling a large source file, as explained in the <a href="../../../../v2/faq.html#c1204" target="_top">FAQ</a>.</td></tr></tbody>
|
||||
<tbody><tr><td class="blurb"> <span class="inlinemediaobject"><img src="../images/note.png" alt="note"></span> This method is useful too if you are getting the
|
||||
error message <span class="emphasis"><em>"fatal error C1204:Compiler limit:internal
|
||||
structure overflow"</em></span> when compiling a large source file,
|
||||
as explained in the <a href="../../../../v2/faq.html#c1204" target="_top">FAQ</a>.</td></tr></tbody>
|
||||
</table></div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
@@ -252,9 +252,10 @@ if you are on Windows, and
|
||||
if you are on Unix.
|
||||
|
||||
[^boost_python.dll] and [^hello.pyd] can be found somewhere in your project's
|
||||
[^bin] directory. After a successful build, you can just link in these DLLs with
|
||||
the Python interpreter. In Windows for example, you can simply put these libraries
|
||||
inside the directory where the Python executable is.
|
||||
[^bin] directory. After a successful build, you make it possible for the system
|
||||
to find boost_python.dll or libboost_python.so (usually done with LD_LIBRARY_PATH,
|
||||
DYLD_LIBRARY_PATH, or some other variable on *nix and with PATH on Windows) and
|
||||
for Python to find the hello module (Done with PYTHONPATH on all systems.)
|
||||
|
||||
You may now fire up Python and run our hello module:
|
||||
|
||||
@@ -1099,7 +1100,7 @@ overloaded functions in one-shot:
|
||||
|
||||
Then...
|
||||
|
||||
.def("foo", foo, foo_overloads());
|
||||
.def("foo", (void(*)(bool, int, char))0, foo_overloads());
|
||||
|
||||
Notice though that we have a situation now where we have a minimum of zero
|
||||
(0) arguments and a maximum of 3 arguments.
|
||||
@@ -1364,11 +1365,6 @@ create a new scope around a class:
|
||||
|
||||
[def Py_Initialize [@http://www.python.org/doc/current/api/initialization.html#l2h-652 Py_Initialize]]
|
||||
[def Py_Finalize [@http://www.python.org/doc/current/api/initialization.html#l2h-656 Py_Finalize]]
|
||||
[def PyRun_String [@http://www.python.org/doc/current/api/veryhigh.html#l2h-55 PyRun_String]]
|
||||
[def PyRun_File [@http://www.python.org/doc/current/api/veryhigh.html#l2h-56 PyRun_File]]
|
||||
[def Py_eval_input [@http://www.python.org/doc/current/api/veryhigh.html#l2h-58 Py_eval_input]]
|
||||
[def Py_file_input [@http://www.python.org/doc/current/api/veryhigh.html#l2h-59 Py_file_input]]
|
||||
[def Py_single_input [@http://www.python.org/doc/current/api/veryhigh.html#l2h-60 Py_single_input]]
|
||||
[def Py_XINCREF [@http://www.python.org/doc/current/api/countingRefs.html#l2h-65 Py_XINCREF]]
|
||||
[def Py_XDECREF [@http://www.python.org/doc/current/api/countingRefs.html#l2h-67 Py_XDECREF]]
|
||||
[def PyImport_AppendInittab [@http://www.python.org/doc/current/api/importing.html#l2h-137 PyImport_AppendInittab]]
|
||||
@@ -1395,17 +1391,17 @@ all. So stay tuned... :-)
|
||||
|
||||
[h2 Building embedded programs]
|
||||
|
||||
To be able to use embedding in your programs, they have to be linked to
|
||||
both Boost.Python's and Python's static link library.
|
||||
To be able to embed python into your programs, you have to link to
|
||||
both Boost.Python's as well as Python's own runtime library.
|
||||
|
||||
Boost.Python's static link library comes in two variants. Both are located
|
||||
Boost.Python's library comes in two variants. Both are located
|
||||
in Boost's [^/libs/python/build/bin-stage] subdirectory. On Windows, the
|
||||
variants are called [^boost_python.lib] (for release builds) and
|
||||
[^boost_python_debug.lib] (for debugging). If you can't find the libraries,
|
||||
you probably haven't built Boost.Python yet. See
|
||||
[@../../../building.html Building and Testing] on how to do this.
|
||||
|
||||
Python's static link library can be found in the [^/libs] subdirectory of
|
||||
Python's library can be found in the [^/libs] subdirectory of
|
||||
your Python directory. On Windows it is called pythonXY.lib where X.Y is
|
||||
your major Python version number.
|
||||
|
||||
@@ -1443,7 +1439,11 @@ steps:
|
||||
|
||||
# Call other Python C API routines to use the interpreter.\n\n
|
||||
|
||||
# Call Py_Finalize() to stop the interpreter and release its resources.
|
||||
[/ # Call Py_Finalize() to stop the interpreter and release its resources.]
|
||||
|
||||
[blurb __note__ [*Note that at this time you must not call Py_Finalize() to stop the
|
||||
interpreter. This may be fixed in a future version of boost.python.]
|
||||
]
|
||||
|
||||
(Of course, there can be other C++ code between all of these steps.)
|
||||
|
||||
@@ -1460,171 +1460,76 @@ messy and especially hard to get right in the presence of C++ exceptions.
|
||||
Fortunately Boost.Python provides the [@../../../v2/handle.html handle] and
|
||||
[@../../../v2/object.html object] class templates to automate the process.
|
||||
|
||||
[h2 Reference-counting handles and objects]
|
||||
|
||||
There are two ways in which a function in the Python/C API can return a
|
||||
[^PyObject*]: as a ['borrowed reference] or as a ['new reference]. Which of
|
||||
these a function uses, is listed in that function's documentation. The two
|
||||
require slightely different approaches to reference-counting but both can
|
||||
be 'handled' by Boost.Python.
|
||||
|
||||
For a function returning a ['borrowed reference] we'll have to tell the
|
||||
[^handle] that the [^PyObject*] is borrowed with the aptly named
|
||||
[@../../../v2/handle.html#borrowed-spec borrowed] function. Two functions
|
||||
returning borrowed references are PyImport_AddModule and PyModule_GetDict.
|
||||
The former returns a reference to an already imported module, the latter
|
||||
retrieves a module's namespace dictionary. Let's use them to retrieve the
|
||||
namespace of the [^__main__] module:
|
||||
|
||||
object main_module((
|
||||
handle<>(borrowed(PyImport_AddModule("__main__")))));
|
||||
|
||||
object main_namespace = main_module.attr("__dict__");
|
||||
|
||||
For a function returning a ['new reference] we can just create a [^handle]
|
||||
out of the raw [^PyObject*] without wrapping it in a call to borrowed. One
|
||||
such function that returns a new reference is PyRun_String which we'll
|
||||
discuss in the next section.
|
||||
|
||||
[blurb __note__ [*Handle is a class ['template], so why haven't we been using any template parameters?]\n
|
||||
\n
|
||||
[^handle] has a single template parameter specifying the type of the managed object. This type is [^PyObject] 99% of the time, so the parameter was defaulted to [^PyObject] for convenience. Therefore we can use the shorthand [^handle<>] instead of the longer, but equivalent, [^handle<PyObject>].
|
||||
]
|
||||
|
||||
[h2 Running Python code]
|
||||
|
||||
To run Python code from C++ there is a family of functions in the API
|
||||
starting with the PyRun prefix. You can find the full list of these
|
||||
functions [@http://www.python.org/doc/current/api/veryhigh.html here]. They
|
||||
all work similarly so we will look at only one of them, namely:
|
||||
Boost.python provides three related functions to run Python code from C++.
|
||||
|
||||
PyObject* PyRun_String(char *str, int start, PyObject *globals, PyObject *locals)
|
||||
object eval(str expression, object globals = object(), object locals = object())
|
||||
object exec(str code, object globals = object(), object locals = object())
|
||||
object exec_file(str filename, object globals = object(), object locals = object())
|
||||
|
||||
PyRun_String takes the code to execute as a null-terminated (C-style)
|
||||
string in its [^str] parameter. The function returns a new reference to a
|
||||
Python object. Which object is returned depends on the [^start] paramater.
|
||||
eval evaluates the given expression and returns the resulting value.
|
||||
exec executes the given code (typically a set of statements) returning the result,
|
||||
and exec_file executes the code contained in the given file.
|
||||
|
||||
The [^start] parameter is the start symbol from the Python grammar to use
|
||||
for interpreting the code. The possible values are:
|
||||
|
||||
[table Start symbols
|
||||
|
||||
[[Py_eval_input] [for interpreting isolated expressions]]
|
||||
[[Py_file_input] [for interpreting sequences of statements]]
|
||||
[[Py_single_input] [for interpreting a single statement]]
|
||||
]
|
||||
|
||||
When using Py_eval_input, the input string must contain a single expression
|
||||
and its result is returned. When using Py_file_input, the string can
|
||||
contain an abitrary number of statements and None is returned.
|
||||
Py_single_input works in the same way as Py_file_input but only accepts a
|
||||
single statement.
|
||||
|
||||
Lastly, the [^globals] and [^locals] parameters are Python dictionaries
|
||||
The [^globals] and [^locals] parameters are Python dictionaries
|
||||
containing the globals and locals of the context in which to run the code.
|
||||
For most intents and purposes you can use the namespace dictionary of the
|
||||
[^__main__] module for both parameters.
|
||||
|
||||
We have already seen how to get the [^__main__] module's namespace so let's
|
||||
run some Python code in it:
|
||||
Boost.python provides a function to import a module:
|
||||
|
||||
object main_module((
|
||||
handle<>(borrowed(PyImport_AddModule("__main__")))));
|
||||
object import(str name)
|
||||
|
||||
import imports a python module (potentially loading it into the running process
|
||||
first), and returns it.
|
||||
|
||||
Let's import the [^__main__] module and run some Python code in its namespace:
|
||||
|
||||
object main_module = import("__main__");
|
||||
object main_namespace = main_module.attr("__dict__");
|
||||
|
||||
handle<> ignored((PyRun_String(
|
||||
|
||||
"hello = file('hello.txt', 'w')\n"
|
||||
"hello.write('Hello world!')\n"
|
||||
"hello.close()"
|
||||
|
||||
, Py_file_input
|
||||
, main_namespace.ptr()
|
||||
, main_namespace.ptr())
|
||||
));
|
||||
|
||||
Because the Python/C API doesn't know anything about [^object]s, we used
|
||||
the object's [^ptr] member function to retrieve the [^PyObject*].
|
||||
object ignored = exec("hello = file('hello.txt', 'w')\n"
|
||||
"hello.write('Hello world!')\n"
|
||||
"hello.close()",
|
||||
main_namespace);
|
||||
|
||||
This should create a file called 'hello.txt' in the current directory
|
||||
containing a phrase that is well-known in programming circles.
|
||||
|
||||
[blurb
|
||||
__note__ [*Note] that we wrap the return value of PyRun_String in a
|
||||
(nameless) [^handle] even though we are not interested in it. If we didn't
|
||||
do this, the the returned object would be kept alive unnecessarily. Unless
|
||||
you want to be a Dr. Frankenstein, always wrap [^PyObject*]s in [^handle]s.
|
||||
]
|
||||
[h2 Manipulating Python objects]
|
||||
|
||||
[h2 Beyond handles]
|
||||
|
||||
It's nice that [^handle] manages the reference counting details for us, but
|
||||
other than that it doesn't do much. Often we'd like to have a more useful
|
||||
class to manipulate Python objects. But we have already seen such a class
|
||||
above, and in the [@python/object.html previous section]: the aptly
|
||||
named [^object] class and it's derivatives. We've already seen that they
|
||||
can be constructed from a [^handle]. The following examples should further
|
||||
illustrate this fact:
|
||||
|
||||
object main_module((
|
||||
handle<>(borrowed(PyImport_AddModule("__main__")))));
|
||||
Often we'd like to have a class to manipulate Python objects.
|
||||
But we have already seen such a class above, and in the
|
||||
[@python/object.html previous section]: the aptly named [^object] class
|
||||
and its derivatives. We've already seen that they can be constructed from
|
||||
a [^handle]. The following examples should further illustrate this fact:
|
||||
|
||||
object main_module = import("__main__");
|
||||
object main_namespace = main_module.attr("__dict__");
|
||||
|
||||
handle<> ignored((PyRun_String(
|
||||
|
||||
"result = 5 ** 2"
|
||||
|
||||
, Py_file_input
|
||||
, main_namespace.ptr()
|
||||
, main_namespace.ptr())
|
||||
));
|
||||
|
||||
object ignored = exec("result = 5 ** 2", main_namespace);
|
||||
int five_squared = extract<int>(main_namespace["result"]);
|
||||
|
||||
Here we create a dictionary object for the [^__main__] module's namespace.
|
||||
Then we assign 5 squared to the result variable and read this variable from
|
||||
the dictionary. Another way to achieve the same result is to let
|
||||
PyRun_String return the result directly with Py_eval_input:
|
||||
|
||||
object result((handle<>(
|
||||
PyRun_String("5 ** 2"
|
||||
, Py_eval_input
|
||||
, main_namespace.ptr()
|
||||
, main_namespace.ptr()))
|
||||
));
|
||||
the dictionary. Another way to achieve the same result is to use eval instead,
|
||||
which returns the result directly:
|
||||
|
||||
object result = eval("5 ** 2");
|
||||
int five_squared = extract<int>(result);
|
||||
|
||||
[blurb
|
||||
__note__ [*Note] that [^object]'s member function to return the wrapped
|
||||
[^PyObject*] is called [^ptr] instead of [^get]. This makes sense if you
|
||||
take into account the different functions that [^object] and [^handle]
|
||||
perform.
|
||||
]
|
||||
|
||||
[h2 Exception handling]
|
||||
|
||||
If an exception occurs in the execution of some Python code, the PyRun_String
|
||||
function returns a null pointer. Constructing a [^handle] out of this null
|
||||
pointer throws [@../../../v2/errors.html#error_already_set-spec error_already_set],
|
||||
so basically, the Python exception is automatically translated into a
|
||||
C++ exception when using [^handle]:
|
||||
If an exception occurs in the evaluation of the python expression,
|
||||
[@../../../v2/errors.html#error_already_set-spec error_already_set] is thrown:
|
||||
|
||||
try
|
||||
{
|
||||
object result((handle<>(PyRun_String(
|
||||
"5/0"
|
||||
, Py_eval_input
|
||||
, main_namespace.ptr()
|
||||
, main_namespace.ptr()))
|
||||
));
|
||||
|
||||
object result = eval("5/0");
|
||||
// execution will never get here:
|
||||
int five_divided_by_zero = extract<int>(result);
|
||||
}
|
||||
catch(error_already_set)
|
||||
catch(error_already_set const &)
|
||||
{
|
||||
// handle the exception in some way
|
||||
}
|
||||
@@ -1638,7 +1543,7 @@ print the exception's traceback to the console, or comparing the type of the
|
||||
exception with those of the [@http://www.python.org/doc/api/standardExceptions.html
|
||||
standard exceptions]:
|
||||
|
||||
catch(error_already_set)
|
||||
catch(error_already_set const &)
|
||||
{
|
||||
if (PyErr_ExceptionMatches(PyExc_ZeroDivisionError))
|
||||
{
|
||||
@@ -1654,21 +1559,6 @@ standard exceptions]:
|
||||
(To retrieve even more information from the exception you can use some of the other
|
||||
exception handling functions listed [@http://www.python.org/doc/api/exceptionHandling.html here].)
|
||||
|
||||
If you'd rather not have [^handle] throw a C++ exception when it is constructed, you
|
||||
can use the [@../../../v2/handle.html#allow_null-spec allow_null] function in the same
|
||||
way you'd use borrowed:
|
||||
|
||||
handle<> result((allow_null(PyRun_String(
|
||||
"5/0"
|
||||
, Py_eval_input
|
||||
, main_namespace.ptr()
|
||||
, main_namespace.ptr()))));
|
||||
|
||||
if (!result)
|
||||
// Python exception occurred
|
||||
else
|
||||
// everything went okay, it's safe to use the result
|
||||
|
||||
[endsect]
|
||||
[endsect] [/ Embedding]
|
||||
|
||||
|
||||
@@ -1,10 +1,18 @@
|
||||
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="refresh" content="0; URL=doc/html/index.html">
|
||||
</head>
|
||||
<body>
|
||||
Automatic redirection failed, click this
|
||||
<a href="doc/html/index.html">link</a>
|
||||
<a href="doc/html/index.html">link</a> <hr>
|
||||
<p>© Copyright Beman Dawes, 2001</p>
|
||||
<p>Distributed under the Boost Software License, Version 1.0. (See
|
||||
accompanying file <a href="../../../LICENSE_1_0.txt">
|
||||
LICENSE_1_0.txt</a> or copy at
|
||||
<a href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>)</p>
|
||||
</body>
|
||||
</html>
|
||||
</html>
|
||||
@@ -1,3 +1,6 @@
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,3 +1,6 @@
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
|
||||
@@ -1,3 +1,6 @@
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
|
||||
@@ -1,3 +1,6 @@
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
|
||||
@@ -1,3 +1,6 @@
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
|
||||
@@ -1,3 +1,6 @@
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
|
||||
@@ -1,3 +1,6 @@
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,3 +1,6 @@
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,3 +1,6 @@
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
Here's the plan:
|
||||
|
||||
I aim to provide an interface similar to that of Boost.Python v1's
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -132,4 +132,6 @@ BOOST_PYTHON_MODULE(my_ext)
|
||||
</p>
|
||||
|
||||
|
||||
<p><i>© Copyright Joel de Guzman 2003. </i>
|
||||
<p><i>© Copyright Joel de Guzman 2003. </i> Distributed under the Boost
|
||||
Software License, Version 1.0. (See accompanying
|
||||
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
@@ -165,6 +165,8 @@ struct return_value_policy : Base
|
||||
<!--webbot bot="Timestamp" endspan i-checksum="39359" -->
|
||||
|
||||
|
||||
<p><i>© Copyright <a href="../../../../people/dave_abrahams.htm">Dave
|
||||
Abrahams</a> 2002. </i>
|
||||
<p><i>© Copyright <a href="../../../../people/dave_abrahams.htm">Dave
|
||||
Abrahams</a> 2002.</i> Distributed under the Boost Software License,
|
||||
Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
|
||||
http://www.boost.org/LICENSE_1_0.txt)</p>
|
||||
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
@@ -35,6 +38,7 @@
|
||||
|
||||
<dd>
|
||||
<dl class="page-index">
|
||||
<dt><a href="#eval-spec"><code>eval</code></a></dt>
|
||||
<dt><a href="#exec-spec"><code>exec</code></a></dt>
|
||||
<dt><a href="#exec_file-spec"><code>exec_file</code></a></dt>
|
||||
</dl>
|
||||
@@ -49,6 +53,23 @@
|
||||
|
||||
<h2><a name="functions"></a>Functions</h2>
|
||||
|
||||
<h3><a name="eval-spec"></a><code>eval</code></h3>
|
||||
<pre>
|
||||
object eval(str expression,
|
||||
object globals = object(),
|
||||
object locals = object());
|
||||
</pre>
|
||||
<dl class="function-semantics">
|
||||
<dt><b>Effects:</b>
|
||||
Evaluate Python expression from <code>expression</code> in the context
|
||||
specified by the dictionaries <code>globals</code> and <code>locals</code>.
|
||||
</dt>
|
||||
<dt><b>Returns:</b>
|
||||
An instance of <a href="object.html#object-spec">object</a>
|
||||
which holds the value of the expression.
|
||||
</dt>
|
||||
</dl>
|
||||
|
||||
<h3><a name="exec-spec"></a><code>exec</code></h3>
|
||||
<pre>
|
||||
object exec(str code,
|
||||
@@ -106,7 +127,7 @@ void greet()
|
||||
|
||||
// Define greet function in Python.
|
||||
object result = exec(
|
||||
"def greet(self): \n"
|
||||
"def greet(): \n"
|
||||
" return 'Hello from Python!' \n",
|
||||
global, global);
|
||||
|
||||
@@ -123,7 +144,7 @@ void greet()
|
||||
we could also store it in an a file...</para>
|
||||
|
||||
<pre>
|
||||
def greet(self):
|
||||
def greet():
|
||||
return 'Hello from Python!'
|
||||
</pre>
|
||||
<para>... and execute that instead.</para>
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
@@ -67,8 +70,6 @@
|
||||
>error C2064: term does not evaluate to a function taking 2 arguments</a>
|
||||
</dt>
|
||||
|
||||
<dt><a href="#voidptr">How do I handle <tt>void *</tt> conversion?</a></dt>
|
||||
|
||||
<dt><a href="#custom_string"
|
||||
>How can I automatically convert my custom string type to
|
||||
and from a Python string?</a></dt>
|
||||
@@ -568,7 +569,7 @@ handle<> f_wrap()
|
||||
...
|
||||
|
||||
def("f", f_wrap());
|
||||
class_<X,X_wrap>("X", init<int>())
|
||||
class_<X,X_wrap,boost::noncopyable>("X", init<int>())
|
||||
...
|
||||
;
|
||||
</pre>
|
||||
@@ -693,29 +694,6 @@ void Export_FXThread()
|
||||
.def("setAutoDelete", (bool (FXThread::*)(bool)) &FXThread::setAutoDelete)</pre>
|
||||
<p>(The bug has been reported to Microsoft.)</p>
|
||||
|
||||
<hr>
|
||||
<h2><a name="voidptr"></a>How do I handle <tt>void *</tt> conversion?</h2>
|
||||
<font size="-1"><i>Niall Douglas provides these notes:</i></font><p>
|
||||
For several reasons Boost.Python does not support <tt>void *</tt> as
|
||||
an argument or as a return value. However, it is possible to wrap
|
||||
functions with <tt>void *</tt> arguments or return values using
|
||||
thin wrappers and the <i>opaque pointer</i> facility. E.g.:
|
||||
<pre>// Declare the following in each translation unit
|
||||
struct void_ {};
|
||||
BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID(void_);
|
||||
|
||||
void *foo(int par1, void *par2);
|
||||
|
||||
void_ *foo_wrapper(int par1, void_ *par2)
|
||||
{
|
||||
return (void_ *) foo(par1, par2);
|
||||
}
|
||||
...
|
||||
BOOST_PYTHON_MODULE(bar)
|
||||
{
|
||||
def("foo", &foo_wrapper);
|
||||
}</pre>
|
||||
|
||||
<hr>
|
||||
<h2><a name="custom_string"></a>How can I automatically
|
||||
convert my custom string type to and from a Python string?</h2>
|
||||
@@ -873,11 +851,11 @@ BOOST_PYTHON_MODULE(custom_string)
|
||||
|
||||
<p>Revised
|
||||
<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
|
||||
28 January, 2004
|
||||
12 March, 2006
|
||||
<!--webbot bot="Timestamp" endspan i-checksum="39359" -->
|
||||
</p>
|
||||
|
||||
<p><i>© Copyright <a href=
|
||||
"../../../../people/dave_abrahams.htm">Dave Abrahams</a> 2002-2003.</i></p>
|
||||
"../../../../people/dave_abrahams.htm">Dave Abrahams</a> 2002-2006.</i></p>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@@ -360,7 +360,8 @@
|
||||
<!--webbot bot="Timestamp" endspan i-checksum="39359" -->
|
||||
|
||||
|
||||
<p class="c3">© Copyright <a href=
|
||||
"../../../../people/dave_abrahams.htm">Dave Abrahams</a>
|
||||
2002.
|
||||
<p class="c3">© Copyright <a href=
|
||||
"../../../../people/dave_abrahams.htm">Dave Abrahams</a> 2002. Distributed
|
||||
under the Boost Software License, Version 1.0. (See accompanying file
|
||||
LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)</p>
|
||||
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,4 +1,7 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,6 +1,9 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content="HTML Tidy, see www.w3.org">
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -104,5 +104,7 @@ RuntimeError: Unidentifiable C++ Exception
|
||||
|
||||
|
||||
<p><i>© Copyright <a href="../../../../people/dave_abrahams.htm">Dave
|
||||
Abrahams</a> 2002. </i>
|
||||
Abrahams</a> 2002. </i> Distributed
|
||||
under the Boost Software License, Version 1.0. (See accompanying file
|
||||
LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)</p>
|
||||
|
||||
|
||||
@@ -1,102 +1,105 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
"HTML Tidy for Windows (vers 1st August 2002), see www.w3.org">
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
<link rel="stylesheet" type="text/css" href="../boost.css">
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
"HTML Tidy for Linux/x86 (vers 1 September 2005), see www.w3.org">
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
|
||||
<link rel="stylesheet" type="text/css" href="../boost.css">
|
||||
|
||||
<title>Boost.Python - <boost/python/numeric.hpp></title>
|
||||
</head>
|
||||
<title>Boost.Python - <boost/python/numeric.hpp></title>
|
||||
</head>
|
||||
|
||||
<body>
|
||||
<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
|
||||
"header">
|
||||
<tr>
|
||||
<td valign="top" width="300">
|
||||
<h3><a href="../../../../index.htm"><img height="86" width="277"
|
||||
alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
|
||||
</td>
|
||||
<body>
|
||||
<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
|
||||
"header">
|
||||
<tr>
|
||||
<td valign="top" width="300">
|
||||
<h3><a href="../../../../index.htm"><img height="86" width="277" alt=
|
||||
"C++ Boost" src="../../../../boost.png" border="0"></a></h3>
|
||||
</td>
|
||||
|
||||
<td valign="top">
|
||||
<h1 align="center"><a href="../index.html">Boost.Python</a></h1>
|
||||
<td valign="top">
|
||||
<h1 align="center"><a href="../index.html">Boost.Python</a></h1>
|
||||
|
||||
<h2 align="center">Header <boost/python/numeric.hpp></h2>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<hr>
|
||||
<h2 align="center">Header <boost/python/numeric.hpp></h2>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<hr>
|
||||
|
||||
<h2>Contents</h2>
|
||||
<h2>Contents</h2>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><a href="#introduction">Introduction</a></dt>
|
||||
<dl class="page-index">
|
||||
<dt><a href="#introduction">Introduction</a></dt>
|
||||
|
||||
<dt><a href="#classes">Classes</a></dt>
|
||||
<dt><a href="#classes">Classes</a></dt>
|
||||
|
||||
<dd>
|
||||
<dl class="page-index">
|
||||
<dt><a href="#array-spec">Class <code>array</code></a></dt>
|
||||
<dd>
|
||||
<dl class="page-index">
|
||||
<dt><a href="#array-spec">Class <code>array</code></a></dt>
|
||||
|
||||
<dd>
|
||||
<dl class="page-index">
|
||||
<dt><a href="#array-spec-synopsis">Class <code>array</code>
|
||||
synopsis</a></dt>
|
||||
<dd>
|
||||
<dl class="page-index">
|
||||
<dt><a href="#array-spec-synopsis">Class <code>array</code>
|
||||
synopsis</a></dt>
|
||||
|
||||
<dt><a href="#array-spec-observers">Class <code>array</code>
|
||||
observer functions</a></dt>
|
||||
<dt><a href="#array-spec-observers">Class <code>array</code>
|
||||
observer functions</a></dt>
|
||||
|
||||
<dt><a href="#array-spec-statics">Class <code>array</code>
|
||||
static functions</a></dt>
|
||||
</dl>
|
||||
</dd>
|
||||
</dl>
|
||||
</dd>
|
||||
<dt><a href="#array-spec-statics">Class <code>array</code> static
|
||||
functions</a></dt>
|
||||
</dl>
|
||||
</dd>
|
||||
</dl>
|
||||
</dd>
|
||||
|
||||
<dt><a href="#examples">Example(s)</a></dt>
|
||||
</dl>
|
||||
<hr>
|
||||
<dt><a href="#examples">Example(s)</a></dt>
|
||||
</dl>
|
||||
<hr>
|
||||
|
||||
<h2><a name="introduction"></a>Introduction</h2>
|
||||
<h2><a name="introduction" id="introduction"></a>Introduction</h2>
|
||||
|
||||
<p>Exposes a <a href=
|
||||
"ObjectWrapper.html#TypeWrapper-concept">TypeWrapper</a> for the Python
|
||||
<a href=
|
||||
"http://www.python.org/dev/doc/devel/lib/typesmapping.html">array</a>
|
||||
type.</p>
|
||||
<p>Exposes a <a href=
|
||||
"ObjectWrapper.html#TypeWrapper-concept">TypeWrapper</a> for the Python
|
||||
<a href=
|
||||
"http://www.python.org/dev/doc/devel/lib/typesmapping.html">array</a>
|
||||
type.</p>
|
||||
|
||||
<h2><a name="classes"></a>Classes</h2>
|
||||
<h2><a name="classes" id="classes"></a>Classes</h2>
|
||||
|
||||
<h3><a name="array-spec"></a>Class <code>array</code></h3>
|
||||
<h3><a name="array-spec" id="array-spec"></a>Class <code>array</code></h3>
|
||||
|
||||
<p>Provides access to the array types of <a href=
|
||||
"http://www.pfdubois.com/numpy/">Numerical Python</a>'s <a href=
|
||||
"http://www.pfdubois.com/numpy/#Numeric">Numeric</a> and <a href=
|
||||
"http://stsdas.stsci.edu/numarray/index.html">NumArray</a> modules. With
|
||||
the exception of the functions documented <a href=
|
||||
"#array-spec-observers">below</a>, the semantics of the constructors and
|
||||
member functions defined below can be fully understood by reading the <a
|
||||
href="ObjectWrapper.html#TypeWrapper-concept">TypeWrapper</a> concept
|
||||
definition. Since <code>array</code> is publicly derived from <code><a
|
||||
href="object.html#object-spec">object</a></code>, the public object
|
||||
interface applies to <code>array</code> instances as well.</p>
|
||||
<p>Provides access to the array types of <a href=
|
||||
"http://www.pfdubois.com/numpy/">Numerical Python</a>'s <a href=
|
||||
"http://www.pfdubois.com/numpy/#Numeric">Numeric</a> and <a href=
|
||||
"http://stsdas.stsci.edu/numarray/index.html">NumArray</a> modules. With
|
||||
the exception of the functions documented <a href=
|
||||
"#array-spec-observers">below</a>, the semantics of the constructors and
|
||||
member functions defined below can be fully understood by reading the
|
||||
<a href="ObjectWrapper.html#TypeWrapper-concept">TypeWrapper</a> concept
|
||||
definition. Since <code>array</code> is publicly derived from
|
||||
<code><a href="object.html#object-spec">object</a></code>, the public
|
||||
object interface applies to <code>array</code> instances as well.</p>
|
||||
|
||||
<p><a name="default_search"></a>The default behavior is to use
|
||||
<code>numarray.NDArray</code> as the associated Python type if the
|
||||
<code>numarray</code> module is installed in the default location.
|
||||
Otherwise it falls back to use <code>Numeric.ArrayType</code>. If neither
|
||||
extension module is installed, conversions to arguments of type
|
||||
<code>numeric::array</code> will cause overload resolution to reject the
|
||||
overload, and other attempted uses of <code>numeric::array</code> will <a
|
||||
href="definitions.html#raise">raise</a> an appropriate Python exception.
|
||||
The associated Python type can be set manually using the <code><a href=
|
||||
"#array-spec-statics">set_module_and_type</a>(...)</code> static
|
||||
function.</p>
|
||||
<p><a name="default_search" id="default_search"></a>The default behavior is
|
||||
to use <code>numarray.NDArray</code> as the associated Python type if the
|
||||
<code>numarray</code> module is installed in the default location.
|
||||
Otherwise it falls back to use <code>Numeric.ArrayType</code>. If neither
|
||||
extension module is installed, overloads of wrapped C++ functions with
|
||||
<code>numeric::array</code> parameters will never be matched, and other
|
||||
attempted uses of <code>numeric::array</code> will <a href=
|
||||
"definitions.html#raise">raise</a> an appropriate Python exception. The
|
||||
associated Python type can be set manually using the <code><a href=
|
||||
"#array-spec-statics">set_module_and_type</a>(...)</code> static
|
||||
function.</p>
|
||||
|
||||
<h4><a name="array-spec-synopsis"></a>Class <code>array</code>
|
||||
synopsis</h4>
|
||||
<pre>
|
||||
<h4><a name="array-spec-synopsis" id="array-spec-synopsis"></a>Class
|
||||
<code>array</code> synopsis</h4>
|
||||
<pre>
|
||||
namespace boost { namespace python { namespace numeric
|
||||
{
|
||||
class array : public object
|
||||
@@ -107,7 +110,7 @@ namespace boost { namespace python { namespace numeric
|
||||
object astype(Type const& type_);
|
||||
|
||||
template <class Type>
|
||||
object new_(Type const& type_) const;
|
||||
array new_(Type const& type_) const;
|
||||
|
||||
template <class Sequence>
|
||||
void resize(Sequence const& x);
|
||||
@@ -133,14 +136,14 @@ namespace boost { namespace python { namespace numeric
|
||||
void tofile(File const& f) const;
|
||||
|
||||
object factory();
|
||||
template <class Buffer>
|
||||
object factory(Buffer const&);
|
||||
template <class Buffer, class Type>
|
||||
object factory(Buffer const&, Type const&);
|
||||
template <class Buffer, class Type, class Shape>
|
||||
object factory(Buffer const&, Type const&, Shape const&, bool copy = true, bool savespace = false);
|
||||
template <class Buffer, class Type, class Shape>
|
||||
object factory(Buffer const&, Type const&, Shape const&, bool copy, bool savespace, char typecode);
|
||||
template <class Sequence>
|
||||
object factory(Sequence const&);
|
||||
template <class Sequence, class Typecode>
|
||||
object factory(Sequence const&, Typecode const&, bool copy = true, bool savespace = false);
|
||||
template <class Sequence, class Typecode, class Type>
|
||||
object factory(Sequence const&, Typecode const&, bool copy, bool savespace, Type const&);
|
||||
template <class Sequence, class Typecode, class Type, class Shape>
|
||||
object factory(Sequence const&, Typecode const&, bool copy, bool savespace, Type const&, Shape const&);
|
||||
|
||||
template <class T1>
|
||||
explicit array(T1 const& x1);
|
||||
@@ -152,6 +155,7 @@ namespace boost { namespace python { namespace numeric
|
||||
|
||||
static void set_module_and_type();
|
||||
static void set_module_and_type(char const* package_path = 0, char const* type_name = 0);
|
||||
static void get_module_name();
|
||||
|
||||
object argmax(long axis=-1);
|
||||
|
||||
@@ -200,54 +204,60 @@ namespace boost { namespace python { namespace numeric
|
||||
}}}
|
||||
</pre>
|
||||
|
||||
<h4><a name="array-spec-observers"></a>Class <code>array</code> observer
|
||||
functions</h4>
|
||||
<pre>
|
||||
<h4><a name="array-spec-observers" id="array-spec-observers"></a>Class
|
||||
<code>array</code> observer functions</h4>
|
||||
<pre>
|
||||
object factory();
|
||||
template <class Buffer>
|
||||
object factory(Buffer const&);
|
||||
template <class Buffer, class Type>
|
||||
object factory(Buffer const&, Type const&);
|
||||
template <class Buffer, class Type, class Shape>
|
||||
object factory(Buffer const&, Type const&, Shape const&, bool copy = true, bool savespace = false);
|
||||
template <class Buffer, class Type, class Shape>
|
||||
object factory(Buffer const&, Type const&, Shape const&, bool copy, bool savespace, char typecode);
|
||||
</pre>
|
||||
These functions map to the underlying array type's <code>array()</code>
|
||||
function family. They are not called "<code>array</code>" because of the
|
||||
C++ limitation that you can't define a member function with the same name
|
||||
as its enclosing class.
|
||||
<pre>
|
||||
template <class Sequence>
|
||||
object factory(Sequence const&);
|
||||
template <class Sequence, class Typecode>
|
||||
object factory(Sequence const&, Typecode const&, bool copy = true, bool savespace = false);
|
||||
template <class Sequence, class Typecode, class Type>
|
||||
object factory(Sequence const&, Typecode const&, bool copy, bool savespace, Type const&);
|
||||
template <class Sequence, class Typecode, class Type, class Shape>
|
||||
object factory(Sequence const&, Typecode const&, bool copy, bool savespace, Type const&, Shape const&);
|
||||
</pre>These functions map to the underlying array type's <code>array()</code>
|
||||
function family. They are not called "<code>array</code>" because of the C++
|
||||
limitation that you can't define a member function with the same name as its
|
||||
enclosing class.
|
||||
<pre>
|
||||
template <class Type>
|
||||
object new_(Type const&) const;
|
||||
</pre>
|
||||
This function maps to the underlying array type's <code>new()</code>
|
||||
function. It is not called "<code>new</code>" because that is a keyword
|
||||
in C++.
|
||||
array new_(Type const&) const;
|
||||
</pre>This function maps to the underlying array type's <code>new()</code>
|
||||
function. It is not called "<code>new</code>" because that is a keyword in
|
||||
C++.
|
||||
|
||||
<h4><a name="array-spec-statics"></a>Class <code>array</code> static
|
||||
functions</h4>
|
||||
<pre>
|
||||
<h4><a name="array-spec-statics" id="array-spec-statics"></a>Class
|
||||
<code>array</code> static functions</h4>
|
||||
<pre>
|
||||
static void set_module_and_type(char const* package_path, char const* type_name);
|
||||
static void set_module_and_type();
|
||||
</pre>
|
||||
|
||||
<dl class="function-semantics">
|
||||
<dt><b>Requires:</b> <code>package_path</code> and
|
||||
<code>type_name</code>, if supplied, is an <a href=
|
||||
"definitions.html#ntbs">ntbs</a>.</dt>
|
||||
<dl class="function-semantics">
|
||||
<dt><b>Requires:</b> <code>package_path</code> and
|
||||
<code>type_name</code>, if supplied, is an <a href=
|
||||
"definitions.html#ntbs">ntbs</a>.</dt>
|
||||
|
||||
<dt><b>Effects:</b> The first form sets the package path of the module
|
||||
which supplies the type named by <code>type_name</code> to
|
||||
<code>package_path</code>. The second form restores the <a href=
|
||||
"#default_search">default search behavior</a>. The associated Python
|
||||
type will be searched for only the first time it is needed, and
|
||||
thereafter the first time it is needed after an invocation of
|
||||
<code>set_module_and_type</code>.</dt>
|
||||
</dl>
|
||||
<dt><b>Effects:</b> The first form sets the package path of the module
|
||||
that supplies the type named by <code>type_name</code> to
|
||||
<code>package_path</code>. The second form restores the <a href=
|
||||
"#default_search">default search behavior</a>. The associated Python type
|
||||
will be searched for only the first time it is needed, and thereafter the
|
||||
first time it is needed after an invocation of
|
||||
<code>set_module_and_type</code>.</dt>
|
||||
</dl>
|
||||
<pre>
|
||||
static std::string get_module_name()
|
||||
</pre>
|
||||
|
||||
<h2><a name="examples"></a>Example</h2>
|
||||
<pre>
|
||||
<dl class="function-semantics">
|
||||
<dt><b>Effects:</b> Returns the name of the module containing the class
|
||||
that will be held by new <code>numeric::array</code> instances.</dt>
|
||||
</dl>
|
||||
|
||||
<h2><a name="examples" id="examples"></a>Example</h2>
|
||||
<pre>
|
||||
#include <boost/python/numeric.hpp>
|
||||
#include <boost/python/tuple.hpp>
|
||||
|
||||
@@ -258,10 +268,9 @@ void set_first_element(numeric::array& y, double value)
|
||||
}
|
||||
</pre>
|
||||
|
||||
<p>Revised 03 October, 2002</p>
|
||||
<p>Revised 07 October, 2006</p>
|
||||
|
||||
<p><i>© Copyright <a href=
|
||||
"../../../../people/dave_abrahams.htm">Dave Abrahams</a> 2002.</i></p>
|
||||
</body>
|
||||
<p><i>© Copyright <a href="../../../../people/dave_abrahams.htm">Dave
|
||||
Abrahams</a> 2002-2006.</i></p>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
@@ -851,12 +854,12 @@ void del(proxy<T> const& x);
|
||||
</dl>
|
||||
<pre>
|
||||
<a name="comparisons-spec"></a>
|
||||
template<class L,class R> bool operator>(L const&l,R const&r);
|
||||
template<class L,class R> bool operator>=(L const&l,R const&r);
|
||||
template<class L,class R> bool operator<(L const&l,R const&r);
|
||||
template<class L,class R> bool operator<=(L const&l,R const&r);
|
||||
template<class L,class R> bool operator==(L const&l,R const&r);
|
||||
template<class L,class R> bool operator!=(L const&l,R const&r);
|
||||
template<class L,class R> object operator>(L const&l,R const&r);
|
||||
template<class L,class R> object operator>=(L const&l,R const&r);
|
||||
template<class L,class R> object operator<(L const&l,R const&r);
|
||||
template<class L,class R> object operator<=(L const&l,R const&r);
|
||||
template<class L,class R> object operator==(L const&l,R const&r);
|
||||
template<class L,class R> object operator!=(L const&l,R const&r);
|
||||
</pre>
|
||||
|
||||
<dl class="function-semantics">
|
||||
|
||||
138
doc/v2/opaque.html
Normal file
138
doc/v2/opaque.html
Normal file
@@ -0,0 +1,138 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright 2003..2006 Haufe Mediengruppe. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
<link rel="stylesheet" type="text/css" href="../boost.css">
|
||||
|
||||
<title>Boost.Python - <boost/python/opaque_pointer_converter.hpp></title>
|
||||
</head>
|
||||
|
||||
<body>
|
||||
<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
|
||||
"header">
|
||||
<tr>
|
||||
<td valign="top" width="300">
|
||||
<h3><a href="../../../../index.htm"><img height="86" width="277"
|
||||
alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
|
||||
</td>
|
||||
|
||||
<td valign="top">
|
||||
<h1 align="center"><a href="../index.html">Boost.Python</a></h1>
|
||||
|
||||
<h2 align="center">Header
|
||||
<boost/python/opaque_pointer_converter.hpp></h2>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<hr>
|
||||
|
||||
<h2>Contents</h2>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><a href="#classes">Classes</a></dt>
|
||||
|
||||
<dd>
|
||||
<dl class="page-index">
|
||||
<dt><a href="#opaque-spec">Class template
|
||||
<code>opaque<Pointee></code></a></dt>
|
||||
|
||||
<dd>
|
||||
<dl class="page-index">
|
||||
<dt><a href="#opaque-spec-synopsis">Class template
|
||||
<code>opaque</code> synopsis</a></dt>
|
||||
</dl>
|
||||
</dd>
|
||||
</dl>
|
||||
</dd>
|
||||
|
||||
<dt><a href="#macros">Macros</a></dt>
|
||||
<dd>
|
||||
<dl class="page-index">
|
||||
<dt><a href="#BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec">Macro
|
||||
<code>BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID</code></a></dt>
|
||||
</dl>
|
||||
</dd>
|
||||
|
||||
<dt><a href="#see-also">See Also</a></dt>
|
||||
</dl>
|
||||
<hr>
|
||||
|
||||
<h2><a name="classes"></a>Classes</h2>
|
||||
|
||||
<h3><a name="opaque-spec"></a>Class template
|
||||
<code>opaque<P></code></h3>
|
||||
|
||||
<p><code>opaque<></code> registers itself as a converter from
|
||||
Python objects to pointers to undefined types and vice versa.</p>
|
||||
|
||||
<h4><a name="opaque-spec-synopsis"></a>Class template
|
||||
<code>opaque</code> synopsis</h4>
|
||||
<pre>
|
||||
namespace boost { namespace python
|
||||
{
|
||||
template<class Pointee>
|
||||
struct opaque
|
||||
{
|
||||
opaque();
|
||||
};
|
||||
}}
|
||||
</pre>
|
||||
|
||||
<h4><a name="opaque-spec-constructor"></a>Class template
|
||||
<code>opaque</code> constructor</h4>
|
||||
<pre>
|
||||
opaque();
|
||||
</pre>
|
||||
|
||||
<dl class="function-semantics">
|
||||
<dt><b>Effects:</b>
|
||||
<ul>
|
||||
<li>Registers the instance as a
|
||||
<a href="lvalue_from_pytype.html#lvalue_from_pytype-spec"> <code>lvalue_from_pytype</code></a>
|
||||
converter from Python objects into opaque pointers.</p>
|
||||
<p>The Python Objects created are named after the type pointed to
|
||||
by the opaque pointer being wrapped.</p></li>
|
||||
<li>Registers the instance as a
|
||||
<a href="to_python_converter.html#to_python_converter-spec"> <code>to_python_converter</code></a>
|
||||
from opaque pointers to Python objects.</p></li>
|
||||
</ul>
|
||||
<p>If there is already an instance registered by another module, this
|
||||
instance doesn't try to register again in order to avoid warnings
|
||||
about multiple registrations.</p>
|
||||
|
||||
<h4>Note</h4>
|
||||
<p>Normally only a single instance of this class is created for every
|
||||
Pointee.</p>
|
||||
</dt>
|
||||
</dl>
|
||||
|
||||
<h2><a name="macros"></a>Macros</h2>
|
||||
|
||||
<h3><a name="BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec"></a>
|
||||
Macro BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID(Pointee)</h3>
|
||||
<p>This macro must be used to define specializations of the
|
||||
<a href="type_id.html#type_id-spec">type_id</a> function
|
||||
which can't be instantiated for incomplete types.</p>
|
||||
<h4>Note</h4>
|
||||
<p>The macro must be invoked in every translation unit which uses the
|
||||
opaque converter.</p>
|
||||
|
||||
<h2><a name="see-also"></a>See Also</h2>
|
||||
<p>
|
||||
<a href="return_opaque_pointer.html">return_opaque_pointer</a>
|
||||
</p>
|
||||
|
||||
<p>Revised
|
||||
10 September, 2006
|
||||
</p>
|
||||
|
||||
<p><i>© Copyright 2003..2006 Haufe Mediengruppe. All Rights
|
||||
Reserved.</i></p>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@@ -1,142 +0,0 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
<link rel="stylesheet" type="text/css" href="../boost.css">
|
||||
|
||||
<title>Boost.Python - <boost/python/opaque_pointer_converter.hpp></title>
|
||||
</head>
|
||||
|
||||
<body>
|
||||
<table border="0" cellpadding="7" cellspacing="0" width="100%" summary=
|
||||
"header">
|
||||
<tr>
|
||||
<td valign="top" width="300">
|
||||
<h3><a href="../../../../index.htm"><img height="86" width="277"
|
||||
alt="C++ Boost" src="../../../../boost.png" border="0"></a></h3>
|
||||
</td>
|
||||
|
||||
<td valign="top">
|
||||
<h1 align="center"><a href="../index.html">Boost.Python</a></h1>
|
||||
|
||||
<h2 align="center">Header
|
||||
<boost/python/opaque_pointer_converter.hpp></h2>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<hr>
|
||||
|
||||
<h2>Contents</h2>
|
||||
|
||||
<dl class="page-index">
|
||||
<dt><a href="#classes">Classes</a></dt>
|
||||
|
||||
<dd>
|
||||
<dl class="page-index">
|
||||
<dt><a href="#opaque_pointer_converter-spec">Class template
|
||||
<code>opaque_pointer_converter<P></code></a></dt>
|
||||
|
||||
<dd>
|
||||
<dl class="page-index">
|
||||
<dt><a href="#opaque_pointer_converter-spec-synopsis">Class template
|
||||
<code>opaque_pointer_converter</code> synopsis</a></dt>
|
||||
</dl>
|
||||
</dd>
|
||||
</dl>
|
||||
</dd>
|
||||
|
||||
<dt><a href="#macros">Macros</a></dt>
|
||||
<dd>
|
||||
<dl class="page-index">
|
||||
<dt><a href="#BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec">Macro
|
||||
<code>BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID</code></a></dt>
|
||||
</dl>
|
||||
</dd>
|
||||
|
||||
<dt><a href="#examples">Example</a></dt>
|
||||
|
||||
<dt><a href="#see-also">See Also</a></dt>
|
||||
</dl>
|
||||
<hr>
|
||||
|
||||
<h2><a name="classes"></a>Classes</h2>
|
||||
|
||||
<h3><a name="opaque_pointer_converter-spec"></a>Class template
|
||||
<code>opaque_pointer_converter<P></code></h3>
|
||||
|
||||
<p><code>opaque_pointer_converter<></code> is derived from
|
||||
<a href="to_python_converter.html#to_python_converter-spec">
|
||||
<code>to_python_converter</code></a>
|
||||
and registers itself as an
|
||||
<a href="lvalue_from_pytype.html#lvalue_from_pytype-spec">
|
||||
<code>lvalue_from_pytype</code></a> converter from Python objects
|
||||
into pointers to undefined types.
|
||||
Thus it may be used as a converter from opaque pointers into
|
||||
Python objects and vice versa.</p>
|
||||
|
||||
<h4><a name="opaque_pointer_converter-spec-synopsis"></a>Class template
|
||||
<code>opaque_pointer_converter</code> synopsis</h4>
|
||||
<pre>
|
||||
namespace boost { namespace python
|
||||
{
|
||||
template<class Pointer>
|
||||
struct opaque_pointer_converter
|
||||
: to_python_converter<
|
||||
Pointer, opaque_pointer_converter<Pointer> >
|
||||
{
|
||||
explicit opaque_pointer_converter(char const* name);
|
||||
};
|
||||
}}
|
||||
</pre>
|
||||
|
||||
<h4><a name="opaque_pointer_converter-spec-constructor"></a>Class template
|
||||
<code>opaque_pointer_converter</code> constructor</h4>
|
||||
<pre>
|
||||
explicit opaque_pointer_converter(char const* name);
|
||||
</pre>
|
||||
|
||||
<dl class="function-semantics">
|
||||
<dt><b>Effects:</b>
|
||||
<p>Registers the instance as a
|
||||
<a href="lvalue_from_pytype.html#lvalue_from_pytype-spec">
|
||||
<code>lvalue_from_pytype</code></a> converter from Python objects
|
||||
into opaque pointers.</p>
|
||||
<p>The name is used for the type of the Python Objects created;
|
||||
it should be printable but needn't be an
|
||||
<a href="definitions.html#ntbs">ntbs</a> because the object type is
|
||||
not supposed to be user constructible within python scripts.</p>
|
||||
</dt>
|
||||
</dl>
|
||||
|
||||
<h2><a name="macros"></a>Macros</h2>
|
||||
|
||||
<h3><a name="BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec"></a>
|
||||
Macro BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID(Pointee)</h3>
|
||||
<p>This macro must be used to define specializations of the
|
||||
<a href="type_id.html#type_id-spec">type_id</a> function
|
||||
which can't be instantiated for incomplete types.</p>
|
||||
<h4>Note</h4>
|
||||
<p>In order for this to work in a cross-module environment the macro must
|
||||
be invoked in every translation unit which uses the
|
||||
opaque_pointer_converter.</p>
|
||||
|
||||
<h2><a name="examples"></a>Example</h2>
|
||||
|
||||
please see example for <a href="return_opaque_pointer.html#examples">
|
||||
return_opaque_pointer</a>.
|
||||
|
||||
<h2><a name="see-also"></a>See Also</h2>
|
||||
<p>
|
||||
<a href="return_opaque_pointer.html">return_opaque_pointer</a>
|
||||
</p>
|
||||
|
||||
<p>Revised
|
||||
10 March, 2003
|
||||
</p>
|
||||
|
||||
<p><i>© Copyright 2003 Haufe Mediengruppe. All Rights
|
||||
Reserved.</i></p>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -320,11 +320,9 @@ See also the
|
||||
|
||||
<hr>
|
||||
|
||||
© Copyright Ralf W. Grosse-Kunstleve 2001-2004. Permission to copy,
|
||||
use, modify, sell and distribute this document is granted provided this
|
||||
copyright notice appears in all copies. This document is provided "as
|
||||
is" without express or implied warranty, and with no claim as to its
|
||||
suitability for any purpose.
|
||||
© Copyright Ralf W. Grosse-Kunstleve 2001-2004. Distributed under
|
||||
the Boost Software License, Version 1.0. (See accompanying file
|
||||
LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
<p>
|
||||
Updated: Feb 2004.
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -112,5 +112,8 @@ BOOST_PYTHON_MODULE(pointee_demo)
|
||||
|
||||
|
||||
<p><i>© Copyright <a href="../../../../people/dave_abrahams.htm">Dave
|
||||
Abrahams</a> 2002. </i>
|
||||
Abrahams</a> 2002. </i> Distributed
|
||||
under the Boost Software License, Version 1.0. (See accompanying file
|
||||
LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)</p>
|
||||
|
||||
|
||||
|
||||
@@ -1,3 +1,6 @@
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
|
||||
@@ -259,5 +259,7 @@ void pass_as_arg(expensive_to_copy* x, PyObject* f)
|
||||
|
||||
|
||||
<p><i>© Copyright <a href="../../../../people/dave_abrahams.htm">Dave
|
||||
Abrahams</a> 2002. </i>
|
||||
Abrahams</a> 2002. </i> Distributed
|
||||
under the Boost Software License, Version 1.0. (See accompanying file
|
||||
LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)</p>
|
||||
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
@@ -904,26 +907,26 @@
|
||||
</dd>
|
||||
|
||||
<dt><a href=
|
||||
"opaque_pointer_converter.html">opaque_pointer_converter.hpp</a></dt>
|
||||
"opaque.html">opaque_pointer_converter.hpp</a></dt>
|
||||
|
||||
<dd>
|
||||
<dl class="index">
|
||||
<dt><a href=
|
||||
"opaque_pointer_converter.html#classes">Classes</a></dt>
|
||||
"opaque.html#classes">Classes</a></dt>
|
||||
|
||||
<dd>
|
||||
<dl class="index">
|
||||
<dt><a href=
|
||||
"opaque_pointer_converter.html#opaque_pointer_converter-spec">opaque_pointer_converter</a></dt>
|
||||
"opaque.html#opaque-spec">opaque</a></dt>
|
||||
</dl>
|
||||
</dd>
|
||||
|
||||
<dt><a href="opaque_pointer_converter.html#macros">Macros</a></dt>
|
||||
<dt><a href="opaque.html#macros">Macros</a></dt>
|
||||
|
||||
<dd>
|
||||
<dl class="index">
|
||||
<dt><a href=
|
||||
"opaque_pointer_converter.html#BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec">
|
||||
"opaque.html#BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec">
|
||||
BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID</a></dt>
|
||||
</dl>
|
||||
</dd>
|
||||
@@ -974,6 +977,7 @@
|
||||
|
||||
<dd>
|
||||
<dl class="index">
|
||||
<dt><a href="exec.html#eval-spec">eval</a></dt>
|
||||
<dt><a href="exec.html#exec-spec">exec</a></dt>
|
||||
<dt><a href="exec.html#exec_file-spec">exec_file</a></dt>
|
||||
</dl>
|
||||
@@ -1091,6 +1095,16 @@
|
||||
</dd>
|
||||
</dl>
|
||||
</dd>
|
||||
|
||||
<dt><a href="ssize_t.html">ssize_t.hpp</a></dt>
|
||||
|
||||
<dd>
|
||||
<dl class="index">
|
||||
<dt><a href="ssize_t.html#typedefs">Typedefs</a></dt>
|
||||
|
||||
<dt><a href="ssize_t.html#constants">Constants</a></dt>
|
||||
</dl>
|
||||
</dd>
|
||||
</dl>
|
||||
|
||||
<h2><a name="topics">Topics</a></h2>
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,3 +1,6 @@
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
@@ -67,7 +70,7 @@
|
||||
undefined types such that the return value is copied into a
|
||||
new Python object.</p>
|
||||
<p>In addition to specifying the <code>return_opaque_pointer</code>
|
||||
policy the <a href="opaque_pointer_converter.html#BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec">
|
||||
policy the <a href="opaque.html#BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID-spec">
|
||||
<code>BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID</code></a> macro must be
|
||||
used to define specializations for the
|
||||
<a href="type_id.html#type_id-spec">type_id</a> function
|
||||
@@ -174,8 +177,8 @@ if __name__ == '__main__':
|
||||
|
||||
<h2><a name="see-also"></a>See Also</h2>
|
||||
<p>
|
||||
<a href="opaque_pointer_converter.html">
|
||||
opaque_pointer_converter</a>
|
||||
<a href="opaque.html">
|
||||
opaque</a>
|
||||
</p>
|
||||
|
||||
<p>Revised
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
@@ -1,5 +1,8 @@
|
||||
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<html>
|
||||
<head>
|
||||
<meta name="generator" content=
|
||||
|
||||
Some files were not shown because too many files have changed in this diff Show More
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