class TESTOne:
    def select(self,data):
        return self.__calu(data)
    def __calu(self,data):
        print(data+110)
        return data+110
class TestTwo:
    def update(self,data):
        self.select(data+100)
    def select(self,data):...
    def test(self,data):
        return self.__calu(data)
    def __calu(self,data):
        print(data+120)
        return data+120
class TestThree(TESTOne, TestTwo):
    def __init__(self):
        super().__init__()
if __name__ == "__main__":
    t = TestThree()
    t.update(1)
    t.test(1)