bpo-44356: [Enum] allow multiple data-type mixins if they are all the same (GH-26649) (GH-26653)
This enables, for example, two base Enums to both inherit from `str`, and then both be mixed into the same final Enum:
class Str1Enum(str, Enum):
GH- some behavior here
class Str2Enum(str, Enum):
GH- some more behavior here
class FinalStrEnum(Str1Enum, Str2Enum):
GH- this now works
(cherry picked from commit 8a4f0850d75747af8c96ca0e7eef1f5c1abfba25)
Co-authored-by: Ethan Furman <ethan@stoneleaf.us>
Co-authored-by: Ethan Furman <ethan@stoneleaf.us>diff --git a/Lib/test/test_enum.py b/Lib/test/test_enum.py
index 34b190b..40794e3 100644
--- a/Lib/test/test_enum.py
+++ b/Lib/test/test_enum.py
@@ -2144,6 +2144,53 @@ def __new__(cls, value):
return member
self.assertEqual(Fee.TEST, 2)
+ def test_miltuple_mixin_with_common_data_type(self):
+ class CaseInsensitiveStrEnum(str, Enum):
+ @classmethod
+ def _missing_(cls, value):
+ for member in cls._member_map_.values():
+ if member._value_.lower() == value.lower():
+ return member
+ return super()._missing_(value)
+ #
+ class LenientStrEnum(str, Enum):
+ def __init__(self, *args):
+ self._valid = True
+ @classmethod
+ def _missing_(cls, value):
+ # encountered an unknown value!
+ # Luckily I'm a LenientStrEnum, so I won't crash just yet.
+ # You might want to add a new case though.
+ unknown = cls._member_type_.__new__(cls, value)
+ unknown._valid = False
+ unknown._name_ = value.upper()
+ unknown._value_ = value
+ cls._member_map_[value] = unknown
+ return unknown
+ @property
+ def valid(self):
+ return self._valid
+ #
+ class JobStatus(CaseInsensitiveStrEnum, LenientStrEnum):
+ ACTIVE = "active"
+ PENDING = "pending"
+ TERMINATED = "terminated"
+ #
+ JS = JobStatus
+ self.assertEqual(list(JobStatus), [JS.ACTIVE, JS.PENDING, JS.TERMINATED])
+ self.assertEqual(JS.ACTIVE, 'active')
+ self.assertEqual(JS.ACTIVE.value, 'active')
+ self.assertIs(JS('Active'), JS.ACTIVE)
+ self.assertTrue(JS.ACTIVE.valid)
+ missing = JS('missing')
+ self.assertEqual(list(JobStatus), [JS.ACTIVE, JS.PENDING, JS.TERMINATED])
+ self.assertEqual(JS.ACTIVE, 'active')
+ self.assertEqual(JS.ACTIVE.value, 'active')
+ self.assertIs(JS('Active'), JS.ACTIVE)
+ self.assertTrue(JS.ACTIVE.valid)
+ self.assertTrue(isinstance(missing, JS))
+ self.assertFalse(missing.valid)
+
def test_empty_globals(self):
# bpo-35717: sys._getframe(2).f_globals['__name__'] fails with KeyError
# when using compile and exec because f_globals is empty