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gh-102558: [Enum] better handling of non-Enum EnumType classes #103060

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Merged
ethanfurman merged 2 commits into from
Mar 27, 2023
Merged

gh-102558: [Enum] better handling of non-Enum EnumType classes #103060

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1bef8ac
fix for non-Enum EnumType class
ethanfurman Mar 25, 2023
8739409
fix for non-Enum EnumType classes
ethanfurman Mar 27, 2023
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fix for non-Enum EnumType classes
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@ethanfurman
ethanfurman committed Mar 27, 2023
commit 8739409be07660be070e183da8ca92a3b41bd05c
4 changes: 2 additions & 2 deletions Lib/enum.py
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Original file line number Diff line number Diff line change
Expand Up @@ -923,7 +923,7 @@ def _convert_(cls, name, module, filter, source=None, *, boundary=None, as_globa
def _check_for_existing_members_(mcls, class_name, bases):
for chain in bases:
for base in chain.__mro__:
if issubclass(base, Enum) and base._member_names_:
if isinstance(base, EnumType) and base._member_names_:
raise TypeError(
"<enum %r> cannot extend %r"
% (class_name, base)
Expand All @@ -942,7 +942,7 @@ def _get_mixins_(mcls, class_name, bases):
# ensure final parent class is an Enum derivative, find any concrete
# data type, and check that Enum has no members
first_enum = bases[-1]
if not issubclass(first_enum, Enum):
if not isinstance(first_enum, EnumType):
raise TypeError("new enumerations should be created as "
"`EnumName([mixin_type, ...] [data_type,] enum_type)`")
member_type = mcls._find_data_type_(class_name, bases) or object
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