class A(object):
    def __init__(self, *args, **kwargs):
        super(A, self).__init__(*args, **kwargs)
        print "A"


class B(object):
    def __init__(self, *args, **kwargs):
        super(B, self).__init__(*args, **kwargs)
        print "B"

 
class C(A, B):
    def __init__(self, *args, **kwargs):
        super(C, self).__init__(*args, **kwargs)
        print "C"


>>> C()
B
A
C
<__main__.C object at 0x838be0c>