Chris Rebert <pyb...@rebertia.com> added the comment: Scouting around the CPython codebase a bit, I speculate that the cause of this behavior is that PyErr_GivenExceptionMatches() in errors.c uses PyType_IsSubtype() [which simply walks a class's __mro__ checking for pointer equality] rather than PyObject_IsSubclass()/PyObject_IsInstance() [which are smart enough to consult __subclasscheck__()/__instancecheck__() if they exist].
Of course, the more important issue here is whether this behavior is intended or not. I surmise python-dev needs to have a discussion about it? ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue12029> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
