Serhiy Storchaka <storchaka+cpyt...@gmail.com> added the comment:
Accepting None makes the typing model more complex. Instead of just a callable functions accept callable-or-none. It terms of annotations, it is Union[Callable[[Any], Any], None] instead of just Callable[[Any], Any]. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue34149> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
