On Mon, Oct 7, 2019, at 10:32, Philippe Prados wrote: > Hello, > > I try to implement a *proof of concept* of Pep-0604 > <https://www.python.org/dev/peps/pep-0604/>. > > To do this, the _GenericAlias must be in builtin, because I would like > to update issubclass() and isinstance() to accept Union. > These methods are in builtin, and must be run without others modules.
Why can't this be handled as an __instancecheck__/__subclasscheck__? _______________________________________________ Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-le...@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/UZRHLKTGR7USOD365N57Y2QVUWWMGPJ7/ Code of Conduct: http://python.org/psf/codeofconduct/
