const-ify ClassBase::getattr()

Add repr() function to Class<T>
Add to_python/from_python conversions for PyPtr<T>
Standardize set_item/get_item interfaces (instead of proxies) for Dict and List
Add Reprable<> template to newtypes.h
Fix a bug wherein the __module__ attribute would be lost for classes that have a default virtual function implementation.


[SVN r8091]

extclass.cpp

@@ -379,6 +379,14 @@ void ExtensionClassBase::add_default_method(PyPtr<Function> method, const char*
         // clear our dict now. It will henceforth contain only default method
         // implementations.
         dict() = Dict();
+
+        // Copy the "__module__" attribute from the fake base class, if any
+        PyObject *module_name = PyDict_GetItemString(new_base->dict().get(), "__module__");
+        if (module_name != 0 && PyString_Check(module_name))
+        {
+            static String module_key("__module__", String::interned);
+            PyDict_SetItem(dict().get(), module_key.get(), module_name);
+        }
     }
     Function::add_to_namespace(method, name, dict().get());
 }