Catching error codes of python processes outside of them in linux?

Question

I am using a python code, not mine, that runs for days or even weeks. It might have some bugs left, so it might crash once in a while. But I dont want to check it every couple of hours. I know that the python process(es) do return codes !=0 if something happens.

But is it possible to catch that from outside of the processes? If yes, I would like to do that, so I can send an Email to myself if something happens.

Thx.

Answer 1

All you need is to check the return code, using something like:-

if PythonScript then
    # Actions on success
    ...
else
    # Actions on failure
    err=$?
    ...
fi

Note that the return code $? is overwritten by every command that is executed, so if its value is needed for logging or other purposes you need to save it before a subsequent command changes it.

If the PythonScript is executable and has the first line #!/usr/bin/python (or the path to the python version to be used), then it can be called directly; otherwise, it should be preceded by python or the appropriate version.