gistfile1.pytb

>>> class A(object):
...     def __init__(self, x):
...             self.x = x
... 
>>> class B(A):
...     def __init__(self, x):
...             super(B, self).__init__(x)
...             print x
... 
>>> B.__name__ = A.__name__
>>> b = B(1)
1
>>> b.__class__.__name__
'A'
>>> isinstance(b, B)
True