我如何才能让python脚本安全地退出自身? [英] How can I have a python script safely exit itself?

问题描述

在这种情况下，如果输入错误，我必须输入密码，否则脚本将不会继续执行而仅退出自身?但是如何告诉脚本安全退出自身?

Heres the scenario I have a password that must be entered if entered wrong the script will not proceed and just exit itself? But how can I tell the script to safely exit itself?

我尝试了 sys.exit()，但这会产生回溯错误，而且似乎不是一个非常干净的退出方法.

I tried sys.exit() but that gives a traceback error and doesn't seem like a very clean exit method.

推荐答案

实际上， sys.exit()只会抛出 SystemExit 异常，这将导致如果未捕获到此异常，则程序退出，但我认为它的编码不佳.

In fact, sys.exit() will only throw a SystemExit exception, which would make the program exit if this exception wasn't catched, but I don't think it's poor coding.

无论如何，如果您需要不惜一切代价立即退出，则另一种可能性是使用 os._exit(0).(请参见 http://docs.python.org/2/library/exceptions.html#exceptions.SystemExit )

Anyway, another possibility is to use os._exit(0) if you need to exit immediately at any cost. (cf. http://docs.python.org/2/library/exceptions.html#exceptions.SystemExit)

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