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gh-114149: [Enum] fix tuple subclass handling when using custom __new__ (GH-114160)

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Ethan Furman 2024-01-17 09:47:11 -08:00 committed by GitHub
parent 029ecee10d
commit 33b47a2c28
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3 changed files with 20 additions and 3 deletions
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6
Lib/enum.py
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@ -250,7 +250,7 @@ class _proto_member:
delattr(enum_class, member_name) delattr(enum_class, member_name)
# second step: create member based on enum_class # second step: create member based on enum_class
value = self.value value = self.value
if not isinstance(value, tuple): if type(value) is not tuple:
args = (value, ) args = (value, )
else: else:
args = value args = value
@ -1777,7 +1777,7 @@ def _simple_enum(etype=Enum, *, boundary=None, use_args=None):
else: else:
# create the member # create the member
if use_args: if use_args:
if not isinstance(value, tuple): if type(value) is not tuple:
value = (value, ) value = (value, )
member = new_member(enum_class, *value) member = new_member(enum_class, *value)
value = value[0] value = value[0]
@ -1826,7 +1826,7 @@ def _simple_enum(etype=Enum, *, boundary=None, use_args=None):
else: else:
# create the member # create the member
if use_args: if use_args:
if not isinstance(value, tuple): if type(value) is not tuple:
value = (value, ) value = (value, )
member = new_member(enum_class, *value) member = new_member(enum_class, *value)
value = value[0] value = value[0]

16
Lib/test/test_enum.py
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@ -3201,6 +3201,22 @@ class TestSpecial(unittest.TestCase):
[x.value for x in NTEnum], [x.value for x in NTEnum],
[TTuple(id=0, a=0, blist=[]), TTuple(id=1, a=2, blist=[4]), TTuple(id=2, a=4, blist=[0, 1, 2])], [TTuple(id=0, a=0, blist=[]), TTuple(id=1, a=2, blist=[4]), TTuple(id=2, a=4, blist=[0, 1, 2])],
) )
#
class NTDEnum(Enum):
def __new__(cls, t_value):
member = object.__new__(cls)
member._value_ = t_value[0]
member.id = t_value[0]
member.a = t_value[1]
member.blist = t_value[2]
return member
NONE = TTuple(0, 0, [])
A = TTuple(1, 2, [4])
B = TTuple(2, 4, [0, 1, 2])
self.assertEqual(repr(NTDEnum.NONE), "<NTDEnum.NONE: 0>")
self.assertEqual(NTDEnum.NONE.id, 0)
self.assertEqual(NTDEnum.A.a, 2)
self.assertEqual(NTDEnum.B.blist, [0, 1 ,2])
def test_flag_with_custom_new(self): def test_flag_with_custom_new(self):
class FlagFromChar(IntFlag): class FlagFromChar(IntFlag):

1
Misc/NEWS.d/next/Library/2024-01-16-15-59-06.gh-issue-114149.LJ8IPm.rst Normal file
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@ -0,0 +1 @@
Enum: correctly handle tuple subclasses in custom ``__new__``.