有没有办法编写一个脚本，每隔几分钟检查另一个 python 进程是否正在运行并在必要时重新运行它？

Question

I am aware how to check if some python process is running. I am trying to write a script, which checks whether a python script is running, if it is not it should rerun it.

What I have right now is:

import os


stream = os.popen("ps aux | grep combined.py")
output = stream.read()
print(output[0])

The problem is I can't get the specific process ID this way, because output is a list of characters not a dict, where I could get PID by output["PID"], to check whether there is an PID in the list.

How would I implement such script?

Answer 1

In bash script:

#!/bin/bash
pid=`ps -ef |grep combined.py |grep -v grep |awk '{print $2}'`
echo $pid

You can use crontab to run the bash script and checks every few minutes if the python process is running