New submission from Ryan McCampbell <rmccampbe...@gmail.com>:
In Python 3.6 the following works:
class HexInt(int):
def __repr__(self):
return hex(self)
class MyEnum(HexInt, enum.Enum):
A = 1
B = 2
C = 3
>>> MyEnum.A
<MyEnum.A: 0x1>
However in Python 3.7/8 it instead prints
>>> MyEnum.A
0x1
It uses HexInt's repr instead of Enum's. Looking at the enum.py module it seems
that this occurs for mixin classes that don't define __new__ due to a change in
the _get_mixins_ method. If I define a __new__ method on the HexInt class then
the expected behavior occurs.
----------
components: Library (Lib)
messages: 361635
nosy: rmccampbell7
priority: normal
severity: normal
status: open
title: Mixin repr overrides Enum repr in some cases
type: behavior
versions: Python 3.7, Python 3.8
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue39587>
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