Hi! I've got a problem when using boost.python on MacOS X. The program exits with TypeError: attribute name must be string This happens both in boost 1.34 and 1.35. I was however able to run attached snippet without problems with boost 1.33. Code: #include using namespace boost::python; class CppClass { public: int getNum() { return 7; } }; int main( int argc, char ** argv ) { try { Py_Initialize(); object main_module(( handle<>(borrowed(PyImport_AddModule("__main__"))))); object main_namespace = main_module.attr("__dict__"); main_namespace["CppClass"] = class_<CppClass>("CppClass") .def("getNum",&CppClass::getNum); handle<> ignored(( PyRun_String( "cpp = CppClass();print cpp.getNum() \n", Py_file_input, main_namespace.ptr(), main_namespace.ptr() ) )); } catch( error_already_set ) { PyErr_Print(); } } Specs, if it should matter: * MacOS 10.4.11, 2.14 GhZ Core 2 Duo * Compiler gcc 4.0.1 (Apple, Inc.), Python 2.4 (MacPorts) Any suggestions/directions? Please let me know if you need additional information. Best, Marco