如何用按键杀死while循环？ [英] How to kill a while loop with a keystroke?

问题描述

我正在读取串行数据并使用while循环写入csv文件。我希望用户一旦感到自己已经收集到足够的数据，便可以终止while循环。

I am reading serial data and writing to a csv file using a while loop. I want the user to be able to kill the while loop once they feel they have collected enough data.

while True:
    #do a bunch of serial stuff

    #if the user presses the 'esc' or 'return' key:
        break

我已经使用opencv做过类似的事情，但是它似乎在此应用程序中不起作用（而且我真的不想仅出于以下目的导入opencv：反正此函数）...

I have done something like this using opencv, but it doesn't seem to be working in this application (and i really don't want to import opencv just for this function anyway)...

        # Listen for ESC or ENTER key
        c = cv.WaitKey(7) % 0x100
        if c == 27 or c == 10:
            break

所以。我该如何让用户摆脱循环？

So. How can I let the user break out of the loop?

此外，我不想使用键盘中断，因为脚本需要在一段时间后继续运行循环终止。

Also, I don't want to use keyboard interrupt, because the script needs to continue to run after the while loop is terminated.

推荐答案

最简单的方法是使用通常的 Ctrl-C （SIGINT）。

The easiest way is to just interrupt it with the usual Ctrl-C (SIGINT).

try:
    while True:
        do_something()
except KeyboardInterrupt:
    pass

由于 Ctrl-C 导致 KeyboardInterrupt 引发，只需将其捕获到循环外并忽略它即可。

Since Ctrl-C causes KeyboardInterrupt to be raised, just catch it outside the loop and ignore it.

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