On 23-jun-2005, at 21:05, Robert W. Johnstone wrote: > Hello, > > I'm trying to develop an extension module in C, but am having some > difficulties. I thought about posting to the general python mailling > list, but since it has to do with the C API I figured this was the > correct > location.
The python list would have been the right location. > > My difficulty lies with subclassing a class provided by another > external > module. I have access to the structure definition, so I can > determine the > size fo the tp_basicsize member of the PyTypeObject structure. What I > can't seem to determine is value for the tp_base element. > > This is my current "best guess". > > PyObject* superclass; > superclass = PyObject_GetAttrString( module, "SuperClass" ); > if ( !superclass ) return; > type.tp_base = superclass->ob_type; type.tp_base = (PyTypeObject*)superclass; > Py_DECREF( superclass ); And don't decref the superclass. You may want to add a typecheck that checks if the superclass is a type. Ronald _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
