如何在 5 分钟后退出 Python3 脚本 [英] How can I exit a Python3 script after 5 minutes

问题描述

我有一个从 SD 卡复制数据的脚本.由于大量文件/文件大小，这可能需要比预期更长的时间.我想在 5 分钟后退出这个脚本.我该怎么做?

I have a script that was copying data from SD card. Due to the huge amount of files/filesize, this might take a longer period of time than expected. I would like to exit this script after 5 minutes. How can I do so?

推荐答案

如果没有任何示例代码，很难验证这是否有效，但您可以尝试使用 信号模块:

It's hard to verify that this will work without any example code, but you could try something like this, using the signal module:

在代码的开头，为警报信号定义一个处理程序.

At the beginning of your code, define a handler for the alarm signal.

import signal

def handler(signum, frame):
    print 'Times up! Exiting..."
    exit(0)

在你开始这个漫长的过程之前，在你的代码中添加这样一行:

Before you start the long process, add a line like this to your code:

#Install signal handler
signal.signal(signal.SIGALRM, handler)

#Set alarm for 5 minutes
signal.alarm(300)

5 分钟后，您的程序将收到警报信号，该信号将调用处理程序，该处理程序将退出.如果需要，您还可以在处理程序中执行其他操作.

In 5 minutes, your program will receive the alarm signal, which will call the handler, which will exit. You can also do other things in the handler if you want.

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