在自定义异常中使用super和__init__

Question

我不明白下面这段代码。对我来说，这看起来像是一种奇怪的语法。

  

super(CustomError, self).__init__(message, base_message, args)

class CustomError(Exception):
    """
    Abstract Base class for all exceptions raised in this ecosystem.

    """
    def __init__(self, message, base_message, *args):
        """
        :param message:
            Message to be displayed to user.

        :param base_message:
            Message to be passed to base class.

        :param args:
            Arguments to be passed to CustomError object.

        """
        super(CustomError, self).__init__(message, base_message, args)

有人可以帮我了解这是内部做什么吗？ base_message和args的目的是什么。

Answer 1

CustomError类（子类）从Exception类（父类）继承。您引用的行调用了Parent类的构造函数。正如在CustomError的构造函数中调用的那样，这意味着在创建CustomeError的实例时，还会调用Parent类的构造函数。

消息是该异常的不同参数。

自定义错误似乎是将任何其他参数捆绑到一个tupple中。

请参见以下示例：

        class CustomError(Exception):
            """
            Abstract Base class for all exceptions raised in this ecosystem.

            """
            def __init__(self, message, base_message, *args):
                """
                :param message:
                    Message to be displayed to user.

                :param base_message:
                    Message to be passed to base class.

                :param args:
                    Arguments to be passed to CustomError object.

                """
                super(CustomError, self).__init__(message, base_message, args)

        try:
            raise Exception('m1','m2',1,2,3)
        except Exception as e:
            print (e.args) #('m1', 'm2', 1, 2, 3)

        try:
            raise CustomError('m1','m2',1,2,3)
        except CustomError as c:
            print (c.args) #('m1', 'm2', ([1, 2, 3],))