[C++-sig] Importing into embedded Python

Feb. 28, 2007

      I'm having problems importing modules containing
Boost.Python produced bindings into an embedded Python
interpreter.

The following compiles into a module that loads fine
into a standalone Python:

testing.hh:
------------------
   class A {
   };
------------------

testing.cpp
------------------
   #include <boost/python.hpp>
   #include "testing.hh"

   using namespace boost::python;

   BOOST_PYTHON_MODULE(testing) {
     class_<A>("A", init<>())
       ;
   }
-------------------

However, I get problems when I try to import the module into
an embedded Python interpreter as follows:

     Py_Initialize();
     PyRun_SimpleString("print 'Running Python'\n"
		       "import testing\n"
		       "print 'imported testing'\n"
		       "a = testing.A() \n"
		       "print 'a=', a \n");

The program outputs:

     Running Python
     imported testing
     Traceback (most recent call last):
     File "<string>", line 4, in ?
     AttributeError: 'module' object has no attribute 'A'

I've googled around and found several pages describing similar
problems, but so far no solutions. My setup is OS X 10.4, Python 2.4.4
and GCC 4.1.1 if that is of any help.
-- 
Pertti

[C++-sig] Importing into embedded Python

Pertti Kellomäki