Method register

Lib/abc.py:110–115

Register a virtual subclass of an ABC. Returns the subclass, to allow usage as a class decorator.

(cls, subclass)

            return cls

        def register(cls, subclass):
            """Register a virtual subclass of an ABC.

            Returns the subclass, to allow usage as a class decorator.
            """
            return _abc_register(cls, subclass)

        def __instancecheck__(cls, instance):
            """Override for isinstance(instance, cls)."""