[issue30545] Enum equality across modules: comparing objects instead of values
New submission from Madhav Datt: The problem is described with an example in this StackOverflow question (https://stackoverflow.com/questions/26589805/python-enums-across-modules). Like in C and other languages, I would expect Enum equality to work across modules and not compare enum states/values, instead of just checking for the same object. A possible simple fix for this problem would be to override the __eq__() function by default in the enum.Enum class with the following: def __eq__(self, other): if isinstance(other, self.__class__): return self.value == other.value return False I would be happy to create a GitHub pull request to fix this, however, I do not have the experience or knowledge to know if - the current behavior is by design; - whether this is worth fixing; and - whether fixing this will break anything else. -- components: Library (Lib) messages: 294983 nosy: Madhav Datt priority: normal severity: normal status: open title: Enum equality across modules: comparing objects instead of values type: behavior versions: Python 2.7 ___ Python tracker <http://bugs.python.org/issue30545> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue30545] Enum equality across modules: comparing objects instead of values
Madhav Datt added the comment: Thanks a lot for those points Ethan. I feel I haven't done a very good job of explaining the bug, but let me use an example. Let's say we have an Enum called MyEnum, which is in a Python module called ModuleA. ModuleB imports ModuleA, and ModuleC imports both, ModuleA and ModuleB. Now, in ModuleC, I have ModuleB.some_function() return a MyEnum state, which I pass as a parameter to ModuleA.other_function() where it is compared to MyEnum states. Here the comparison fails even though it should not have. Obviously, this problem would not arise without such imports, and so is pretty specific, but I hope this makes explains it a little better. -- status: closed -> open ___ Python tracker <http://bugs.python.org/issue30545> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
