class A:

    class A1:
        def __init__(self):
            print 'A1.__init__'

        def foo(self):
            print 'A1.foo'

    def __init__(self):
        print 'A.__init__'
        
    def foo(self):
        print 'A.foo'


class B:
    def __init__(self):
        print 'B.__init__'

    def bar(self):
        print 'B.bar'


class C(A,B):
    def foobar(self):
        print 'C.foobar'


c = C()
c.foo()
c.bar()
c.foobar()