At Fri, 4 Feb 2011 14:08:11 +0000, Julian Bailey wrote:
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__");
Do you have a complete stack backtrace?
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.
Yeah, but you can't use the python debug library unless you are also passing python-debugging=on to your Boost build as described in http://www.boost.org/doc/libs/1_45_0/libs/python/doc/building.html#python-de... . Are you doing that? If not, a crash is to be expected.
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?
It should. -- Dave Abrahams BoostPro Computing http://www.boostpro.com