Re: [Python-ideas] add __contains__ into the "type" object

-1. It is already possible to specify what inst in cls means by using a metaclass. For example: class Color(enum.Enum): RED = 1 GREEN = 2 BLUE = 3 some_var = Color.GREEN some_var in Color # True some_var in enum.Enum # False Containment != isinstance() -- ~Ethan~