New submission from Joseph Perez <jope...@hotmail.fr>:
PEP 585 has the side-effect of making `list[int]` an instance of `type`. This is not the case for other generic aliases. It also implies that `inspect.isclass(list[int]) is True`, while `list[int]` is not a class; as a proof of this statement `issubclass(list[int], collections.abc.Collection)` raises `TypeError: issubclass() arg 1 must be a class`. By the way, there is the awkward thing of having `isinstance(list[int], type) is True` while `issubclass(type(list[int]), type) is False`. ---------- messages: 394950 nosy: joperez priority: normal severity: normal status: open title: PEP 585 breaks inspect.isclass versions: Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue44293> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
