It's tedious to add classes one by one using PyModule_AddObject in PyInit_module function. Wouldn't it be much easier if there's a slot that has an array of all the classes in their PyObject form and it'll automatically add those classes. Since this is a backwards compatibility change it'll be best if a macro (like PY_AUTO_OBJECT maybe?) is defined then it'll add those classes automatically. If the slot is NULL or 0 then don't add anything. But yeah they may add more classes if they want but it doesn't matter much. Thanking you, With Regards, Shreyan Avigyan