奇怪的异常行为
Strange exception behaviour
我想实现一个异常显示器，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？
IOError只是Python3中OSError的别名，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.
我想实现一个异常显示器，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？
IOError只是Python3中OSError的别名，见https://docs.python.org/3/library/exceptions.html#concrete-exceptions:
Changed in version 3.3:
EnvironmentError,IOError,WindowsError,VMSError,socket.error,select.errorandmmap.errorhave been merged intoOSError, and the constructor may return a subclass.