In [1]: class A(object):
   ...:     def lala(self):
   ...:         return 5
   ...:

In [2]: class B(A):
   ...:     def lala(self):
   ...:         x = super(B, self).lala()
   ...:         return x * 2
   ...:

In [3]: B().lala()
Out[3]: 10