Dominic Davis-Foster <dom131...@googlemail.com> added the comment:
I believe the regression is due to GH-14545 which "fixed" bpo-37479. The news entry states: "When `Enum.__str__` is overridden in a derived class, the override will be used by `Enum.__format__` regardless of whether mixin classes are present." . The change is in the __format__ method of Enum. It now checks if type(self).__str__ != Enum.__str__ and if True calls str(self). Because Flag defines its own __str__ method, the expression evaluates to True. I do not think this is the indented behaviour. In 3.8.5 str(self) was only called if _member_type_ is object. ---------- nosy: +dom1310df _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue41907> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
