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bpo-41889: [Enum] fix multiple-inheritance regression (GH-22487)

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Ethan Furman 2020-12-07 00:17:31 -08:00 • committed by GitHub
parent 212337369a
commit c266736ec1
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3 changed files with 35 additions and 3 deletions
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11
Lib/enum.py
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@ -146,8 +146,9 @@ class EnumMeta(type):
for key in ignore:
classdict.pop(key, None)
member_type, first_enum = metacls._get_mixins_(cls, bases)
__new__, save_new, use_args = metacls._find_new_(classdict, member_type,
first_enum)
__new__, save_new, use_args = metacls._find_new_(
classdict, member_type, first_enum,
)
# save enum items into separate mapping so they don't get baked into
# the new class
@ -501,12 +502,16 @@ class EnumMeta(type):
for base in chain.__mro__:
if base is object:
continue
elif issubclass(base, Enum):
if base._member_type_ is not object:
data_types.append(base._member_type_)
break
elif '__new__' in base.__dict__:
if issubclass(base, Enum):
continue
data_types.append(candidate or base)
break
elif not issubclass(base, Enum):
else:
candidate = base
if len(data_types) > 1:
raise TypeError('%r: too many data types: %r' % (class_name, data_types))