Reusing object methods?

[Ivan Voras]

Can this be done: (this example doesn't work)
----
class A:
    def a_lengthy_method(self, params):
         # do some work depending only on data in self and params
class B:
    def __init__(self):
        self.a_lengthy_method = A.a_lengthy_method
        # I know that data in "self" of class B object is compatible
        # with that of class A object
----
I want to 'reuse' the same method from class A in class B, and without 
introducing a common ancestor for both of them - is this possible in an 
elegant, straightforward way?

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