7     def __init__(cls, name, bases, attrs):  argument
8         cls.registry = {}
9         type.__init__(cls, name, bases, attrs)
25     def __init__(cls, name, bases, attrs):  argument
26         super(ClassRegistry, cls).__init__(name, bases, attrs)
28             if not cls.implemented:
34             cls.name
36             cls.name = name
37         cls.registry[cls.name] = cls
44     def unregister(cls):  argument
45         for key in cls.registry.keys():
46             if cls.registry[key] is cls:
47                 del cls.registry[key]