python/example/example1.cpp

#include <string.h>

namespace hello {
  class world
  {
   public:
      world(int) {}
      ~world() {}
      const char* get() const { return "hi, world"; }
  };

  size_t length(const world& x) { return strlen(x.get()); }
}

#include <boost/python/class_builder.hpp>

// Python requires an exported function called init<module-name> in every
// extension module. This is where we build the module contents.
BOOST_PYTHON_MODULE_INIT(hello)
{
    // create an object representing this extension module
    boost::python::module_builder hello("hello");

    // Create the Python type object for our extension class
    boost::python::class_builder<hello::world> world_class(hello, "world");

    // Add the __init__ function
    world_class.def(boost::python::constructor<int>());
    // Add a regular member function
    world_class.def(&hello::world::get, "get");

    // Add a regular function to the module
    hello.def(hello::length, "length");
}

// Win32 DLL boilerplate
#if defined(_WIN32)
#include <windows.h>
extern "C" BOOL WINAPI DllMain(HINSTANCE, DWORD, LPVOID)
{
    return 1;
}
#endif // _WIN32