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Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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assignee='https://github.com/ethanfurman'closed_at=<Date2020-12-08.03:21:43.846>created_at=<Date2020-09-30.04:21:36.560>labels= ['3.8', 'type-bug', 'library', '3.9', '3.10']
title='enum: Mixin and int base class regression in 3.8.6'updated_at=<Date2020-12-08.03:21:43.845>user='https://github.com/puddly'
The following code worked in 3.8.5 but does not in 3.8.6 due to the fix for bpo-39587:
import enum
class MyInt(int):
def __new__(cls, value):
return super().__new__(cls, value)
class HexMixin:
def __repr__(self):
return hex(self)
class MyIntEnum(HexMixin, MyInt, enum.Enum):
pass
class Foo(MyIntEnum):
TEST = 1
assert isinstance(Foo.TEST, MyInt)
assert repr(Foo.TEST) == "0x1"
In 3.8.6, the Foo enum itself fails to be created because HexMixin is now considered the member type instead of MyInt:
Traceback (most recent call last):
File "enum_test.py", line 18, in <module>
class Foo(MyIntEnum):
File "/usr/local/Cellar/python@3.8/3.8.6/Frameworks/Python.framework/Versions/3.8/lib/python3.8/enum.py", line 215, in __new__
enum_member = __new__(enum_class)
TypeError: object.__new__(Foo) is not safe, use int.__new__()
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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