奇怪的异常行为

Question

我想实现一个异常显示程序，但它不起作用，但我有一些不同的东西：

Traceback (most recent call last):
    File "/Users/honzik/PycharmProjects/Toy/test.py", line 21, in main
    raise IOError('Foo bar bazooka!')
OSError: Foo bar bazooka!

当我指定IOError时，如何引发OSError

Answer 1

IOError只是Python3中OSError的别名，请参见https://docs.python.org/3/library/exceptions.html#concrete-exceptions：

Changed in version 3.3: EnvironmentError, IOError, WindowsError, VMSError, socket.error, select.error and mmap.error have been merged into OSError, and the constructor may return a subclass.