Joseph L. Casale wrote:
>>>>> import enum
>>>>> class M(enum.EnumMeta):
>>... def __contains__(self, value):
>>... print("checking", value)
>>... return super().__contains__(value)
>>...
>>>>> class Colors(enum.Enum, metaclass=M):
>>... red = 1
>>... green = 2
>>... blue = 3
>>...
>>>>> Colors.red in Colors
>>checking Colors.red
>>True
>>
>>Is that what you're asking for? If not can you give an example?
>
> Hi Peter,
> That is exactly what I was referring to, I just wondered if I overlooked
> some way to apply it after the initial meta class built the instance. It
> appears not...
Like that?
>>> class M2(enum.EnumMeta):
... def __contains__(self, value):
... print(value, "? never", sep="")
... return False
...
>>> Colors.__class__
<class '__main__.M'>
>>> Colors.red in Colors
checking Colors.red
True
>>> Colors.__class__ = M2
>>> Colors.red in Colors
Colors.red? never
False
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