Łukasz Langa <luk...@langa.pl> added the comment: The change to disallow this in Python 3.9 was deliberate, see BPO-40187 and its description.
Your attempt to make `isinstance()` work with TypedDict subclasses goes directly against this design. In fact, PEP 589 explicitly says that: - Methods are not allowed, since the runtime type of a TypedDict object will always be just dict (it is never a subclass of dict). - Specifying a metaclass is not allowed. I'm -1 to allow this but I'll also wait for Serhiy to voice his opinion. ---------- nosy: +lukasz.langa, serhiy.storchaka _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue44919> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
