[C++-sig] Calling member function of object created in C++ via embedded Python

[Ron Brown, Jr.]

John,

Thanks for the help, that's exactly what I was looking for!  Below is 
the modified code that shows what I was looking to do.

This was also helpful:
http://www.boost.org/libs/python/doc/v2/register_ptr_to_python.html

Thanks again!

- Ron

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#include <boost/python.hpp>
#include <iostream>
using namespace boost::python;

class World
{
public:
      void set(std::string msg) { this->msg = msg; }
      std::string greet() { return msg; }
      std::string msg;
};

typedef boost::shared_ptr< World > world_ptr;

BOOST_PYTHON_MODULE(hello)
{
      class_<World>("World")
          .def("greet", &World::greet)
          .def("set", &World::set)
      ;

      register_ptr_to_python<world_ptr>();
}

int main(int argc, char *argv[])
{

	Py_Initialize();

	world_ptr worldObjectPtr (new World);
	worldObjectPtr->set("Hello from C++!");

	try {
		inithello();
		PyRun_SimpleString("import hello");
		object module(handle<>(borrowed(PyImport_AddModule("__main__"))));
		object dictionary = module.attr("__dict__");
		
		dictionary["pyWorldObjectPtr"] = worldObjectPtr;
		PyRun_SimpleString("pyWorldObjectPtr.set('Hello from Python!')");
				
	} catch (error_already_set) {
		PyErr_Print();
	}
	
	std::cout << "worldObjectPtr->greet(): " << worldObjectPtr->greet() << 
std::endl;
		
	Py_Finalize();
	
	return 0;
}
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Output:
worldObjectPtr->greet(): Hello from Python!
--------------------------------------------------