class a:
    def x():
        pass

class b(a):
    def x():
        None

b = b()

print(vars(a))
print(vars(b.__class__))
for func, code in vars(b.__class__).items():
    if code not in vars(a).values():
        print(func)


print( dict(list(set(b.__class__.__dict__.items()) - set(a.__dict__.items()))).keys() )
