Question

class GenericMaxException(Exception):
     """Base class for all Max layer exceptions."""

     def __init__(self, *, message):
         """
         Constructor.

         Parameters:
             Required:
                 message - String describing exception.

             Optional:
                 None
         """

         super().__init__(message)

为什么我们需要超级传递消息。该消息是否是GenericMaxException继承自say Exception类的类中任何函数的参数。？我知道super在引用基类属性。但是无法理解为什么在super内部调用message参数。

Answer 1

默认情况下，如果在引发异常时没有使用super传递任何内容，则没有任何解释，它仅显示在追溯中何处/哪一行引发了异常。但是，当引发异常时，传递消息会给出解释。

示例1：

class GenericMaxException(Exception):
    """Base class for all Max layer exceptions."""

    def __init__(self, * ,message):
        """
        Constructor.

        Parameters:
            Required:
                message - String describing exception.

            Optional:
                None
        """

        super().__init__()


raise GenericMaxException(message="This is the reason.")

输出：

Traceback (most recent call last):
  File "/home/user/PycharmProjects/pythonTutorials/tutorials/temp.py", line 19, in <module>
    raise GenericMaxException(message="This is the reason.")
__main__.GenericMaxException  # No explanation why it occurred only mentioned is where it occurred

示例2：

class GenericMaxException(Exception):
    """Base class for all Max layer exceptions."""

    def __init__(self, *, message):
        """
        Constructor.

        Parameters:
            Required:
                message - String describing exception.

            Optional:
                None
        """

        super().__init__(message)


raise GenericMaxException(message="This is the reason.")

输出：

Traceback (most recent call last):
  File "/home/user/PycharmProjects/pythonTutorials/tutorials/temp.py", line 19, in <module>
    raise GenericMaxException(message="This is the reason.")
__main__.GenericMaxException: This is the reason. # Here is the explanation.

代码块中超级引用接口的含义

1 个答案: