Vadim Pushtaev <pushtaev...@gmail.com> added the comment:
Usually, tp_new==NULL means that __new__ is inherited, but not always. Here is the comment from typeobject.c: /* The condition below could use some explanation. It appears that tp_new is not inherited for static types whose base class is 'object'; this seems to be a precaution so that old extension types don't suddenly become callable (object.__new__ wouldn't insure the invariants that the extension type's own factory function ensures). Heap types, of course, are under our control, so they do inherit tp_new; static extension types that specify some other built-in type as the default also inherit object.__new__. */ So my current solution is to explicitly set __new__ to the common helper function that raises TypeError in that case. --- Thanks a lot for your comments and ideas. In truth, I feel a little overwhelmed and definitely need further guidance for this issue. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue34284> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
