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如何打印最后一行 Python 一直卡在

[英]How to print the last line Python has been stuck on

原文 2022-09-01 13:43:42 7 1 python/ debugging/ raspberry-pi-zero

I have a program running on a raspberry pi zero 2 but at a certain point it just stops, no errors, no program exit, can ctrl+c perfectly fine.我有一个在树莓派零 2 上运行的程序，但在某个点它只是停止，没有错误，没有程序退出，可以 ctrl+c 完全正常。 It just stops doing anything and I'm not sure why.它只是停止做任何事情，我不知道为什么。

There is a lot of complicated code that runs before this and it also calls an external library so I don't want to have to scrub through everything (that's a very deep rabbit hole).在此之前运行了很多复杂的代码，它还调用了一个外部库，所以我不想遍历所有内容（这是一个非常深的兔子洞）。 I just want to know the last line it completed before it got stuck so I can un-stuck it.我只想知道它在卡住之前完成的最后一行，这样我就可以解开它。

Is there any way to print the last line that was executed when it gets stuck?有没有办法打印卡住时执行的最后一行？ Maybe I can print the last line that was executed when I press ctrl+C?也许我可以打印按 ctrl+C 时执行的最后一行？

1 个解决方案

So, quite a simple solution really that I apparently was not aware of.所以，我显然没有意识到一个非常简单的解决方案。 Pressing ctrl+c by default will print the traceback for the last few lines.默认情况下按 ctrl+c 将打印最后几行的回溯。 It did not work for me because I had an exception clause that dealt with any keyboard interrupt.它对我不起作用，因为我有一个处理任何键盘中断的例外条款。 Getting rid of that clause forced my program to crash, now I have a separate issue of finding out what ready, _, _ = select.select([self.fd, self.pipe_abort_read_r], [], [], timeout.time_left()) means.摆脱该子句迫使我的程序崩溃，现在我有一个单独的问题是找出ready, _, _ = select.select([self.fd, self.pipe_abort_read_r], [], [], timeout.time_left())的意思。

But in regard to this question I guess it has been solved, thanks to AKX for clarifying.但是关于这个问题我想它已经解决了，感谢AKX的澄清。