Stefan Behnel added the comment: >>> inspect.isbuiltin() returns False >> Are you absolutely sure about this? > Yes.
Oh, well... isbuiltin(cyfunction) *does* return False. However, ismethoddescriptor(cyfunction) returns True, because Cython's functions bind as methods and thus have a "__get__()" (but no __set__()). Therefore, _signature_is_builtin(cyfunction) returns True, and the Signature.from_builtin(cyfunction) code path is taken and fails. So, once again: If the intention is to test that a callable has a "__text_signature__", then the code should test for the existance of "__text_signature__". It should *not* try to test for types that may or may not have such an attribute, and then just fail if it surprisingly does not find it. ---------- status: closed -> open _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue17159> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
