How to restart a file after an error?

Question

Python

try/except (and finally) won't work because the error occurs in the except block. It is necessary that the file (or code) is completely restarted after an error. I heard something about systemd and restart: on-failure in it, but did not understand how to use this thing.

Answer 1

Based on systemd, are you on Linux? So you have os.system (command) will return the exit code, which is equal to zero on normal completion.

import os
 
while True:
    exit_code = os.system("python3 script.py")  # Возможно тут следует написать полные пути
    if exit_code == 0:
        print("success!")
        break
    print(f"exit_code is {exit_code}, will retry")

And systemd is closer to the administration of the whole system. These are background services and tasks, etc.