>>> class ConjoinedMeta(type):
... def __new__(cls, name, bases, attrs):
... for k,v in attrs.items():
... setattr(ConjoinedMeta, k, v)
... return ConjoinedMeta
...
>>> class A(object):
... __metaclass__ = ConjoinedMeta
... a = "a"
...
>>> A
<class '__main__.ConjoinedMeta'>
>>> class B(object):
... __metaclass__ = ConjoinedMeta
...
>>> B.a
'a'
>>> B.b = 'b'
>>> A.b
'b'
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