EnumMeta implements its own __getitem__ function which doesn't respect __class_getitem__. Now that __class_getitem__ exists, this behavior feels unintuitive. For instance ``` class Directions(enum.Enum): LEFT = "LEFT" RIGHT = "RIGHT" def __class_getitem__(cls, name): return super().__class_getitem__(name.upper()) # fails with KeyError -- __class_getitem__ never called assert Directions["left"] == Directions["LEFT"] == Directions.LEFT ``` doesn't work, and the only way to implement this behavior is something like ``` class MyEnumMeta(enum.EnumMeta): def __getitem__(cls, name): return cls.__class_getitem__(name) class MyEnum(enum.Enum, metaclass=MyEnumMeta): def __class_getitem__(cls, name): return cls._member_map_[name] class Directions(MyEnum): ... ``` there might be some compatibility issues with code written between 3.4 and 3.11, but not supporting __class_getitem__ feels like it violates the principle of least surprise with the more recent data models.