python inheritance with args

foo.py

class A(object):
    def __init__(self, astr='noA'):
        print 'init A foo? {}'.format(astr)

class B_alpha(A):
    def __init__(self, bstr='noB', *args,  **kwargs):
        print 'init B alpha bar? {}'.format(bstr)
        super(B_alpha, self).__init__(*args, **kwargs)

class B_beta(A):
    def __init__(self, *args, **kwargs):
        print 'init B beta'
        super(B_beta, self).__init__(*args, **kwargs)

class C(B_alpha, B_beta):
    pass

c = C(astr='foo')