Question

在此处找不到答案，因此将其发布。出现此错误：

main() takes 1 positional argument but 2 were given

对于此代码，B尝试扩展A的方法，而该方法将实习生调用其他类方法。

class A:
    @classmethod
    def run(cls):        
        cls.main(cls)

    @classmethod
    def main(cls):
        """Override and set main logic here
        """
        pass


class B(A):        
    title = "Hello"
    @classmethod
    def run(cls, name):
        cls.name = name
        super().run()

    @classmethod
    def main(cls, *args):
        """Override and set main logic here
        """
        print(cls.title, cls.name)

B.run('Bob')   # Hello Bob

Answer 1

super()通过：

(<class '__main__.B'>, <class '__main__.B'>)

当B.main()调用时，

进入A.run()：只需收集任何其他位置参数即可使B处理额外的参数：

def main(cls, *args):

调用@classmethod的super，它调用另一个classmethod

1 个答案: