[Boost-users] boost::python::import causes access violation

Subject: [Boost-users] boost::python::import causes access violation
From: Julian Bailey (jab_at_[hidden])
Date: 2011-02-04 09:08:11

Hi,

I am running through the basic examples on the boost website for embedding boost::python.

My code currently reads:

#include <iostream>

#include "./include/Python.h"
#include "./boost/python.hpp"

using namespace boost::python;

int    main(void)
{
       Py_Initialize();

       object main_module = import("__main__");
       object main_namespace = main_module.attr("__dict__");

       object ignored = exec("print Hello world",main_namespace);

       return 0;
}

The program links successfully and begins running, however an access violation occurs (NULL pointer) at the first line after "py_initialize();" when i call import("__main__");

Visual studio 2010s debugger says the exception occurs at:  line 74 in object_attributes.hpp:

inline object const_attribute_policies::get(object const& target, char const* key)
{
    return python::getattr(target, key);
}

Python was built using Visual studio 2010 so i had access to the python debug library. Boost is version 1.45 and was built using :

bjam --build-type=complete msvc stage --with-python

I am linking against:
boost_python-vc100-mt-gd-1_45.lib
and
boost_python-vc100-mt-gd-1_45.dll

I have looked for soutions on the internet and have found nothing right now. Can anyone help me?

note: i am building my application in MSVC 2010, this should work though shouldn't it?

Dr Julian Bailey
Electronic Systems & Devices,
School of Electronics and Computer Science,
University of Southampton,
Southampton,
SO17 1BJ,
United Kingdom.

Tel. [phone]
email: jab_at_[hidden]