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Fix inference of IntEnum value attribute type (Python 2) #10417

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Merged
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May 4, 2021
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Fix inference of IntEnum value attribute type (Python 2) #10417

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6 changes: 5 additions & 1 deletion mypy/plugins/enums.py
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Original file line number Diff line number Diff line change
Expand Up @@ -109,7 +109,11 @@ def _implements_new(info: TypeInfo) -> bool:
subclass. In the latter case, we must infer Any as long as mypy can't infer
the type of _value_ from assignments in __new__.
"""
type_with_new = _first(ti for ti in info.mro if ti.names.get('__new__'))
type_with_new = _first(
ti
for ti in info.mro
if ti.names.get('__new__') and not ti.fullname.startswith('builtins.')
)
if type_with_new is None:
return False
return type_with_new.fullname not in ('enum.Enum', 'enum.IntEnum', 'enum.StrEnum')
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