python nested classes

Question

First of all, here\'s my test code, I\'m using python 3.2.x:

class account:
    def __init__(self):
        pass

    class bank:
        def __init__(self):         


        

Answer 1

There are several problems:

1. You're using the name balance for both the data member and for the function.
2. You're missing a return statement in balance().
3. balance() operates on an instance of bank. There is no instance in a.bank.balance: here, a.bank refers to the inner class itself.