subprocess ends when exiting the script in python

Question

I have a created a script that checks if some other script is running. If the script has stuck for some case i want to restart the script.

Here is my code

import os
import subprocess
from subprocess import call 
import datetime
import time
from time import ctime

statinfo = os.stat('nemo_logs/nemo_log_file_' + time.strftime('%Y-%m-%d') + '.txt')
for i in range(1):
    first_size = statinfo.st_size
    time.sleep(10)
    if statinfo.st_size > first_size:
        print("SCRIPT IS RUNNING")
    else:
        print("SCRIPT IS NOT RUNNING. TRYING TO KILL THE SCRIPT...")
        os.system("pkill -9 -f selenium_nemo.py")
        print("SCRIPT KILLED. TRYING TO RESTART THE SCRIPT...")
        subprocess.call("python /root/btree/selenium_nemo.py", shell=True)
        print("SCRIPT STARTED")

When i call the subprocess.call the script strarts but its executing inside the 'ckeck' script. If i stop executing the check-script the subprocess ends. The check script is on crontab and i want after starting the script that has stuck to exit the check script. How i can achieve this? Thanks

Answer 1

Instead of calling python /root/btree/selenium_nemo.py directly, you could call nohup python /root/btree/selenium_nemo.py & . This will separate your new process from the calling process, so it will survive the stopping of your python script.