#include <cmath>
#include <boost/Python.h>

float func( int a )
{
    return a*a-0.5;
}

BOOST_PYTHON_MODULE(test_module)
{
    using namespace boost::python;
    def("func", func);
}

int main()
{
    //Try one
    boost::python::exec("b = 5");
    //Crash

    //Try two
    Py_Initialize();
    boost::python::exec("b = 5");
    //Works fine

    //Try three
    Py_Initialize();
    boost::python::exec("import test_module");
    //Throws boost::python::error_already_set and crashes

    /*
    Something along the lines of
    boost::python::exec("import test_module\n"
                "var = test_module.func( 3 )\n");
    */

}