os.system
return exit code. It does not provide pid of the child process.
Use subprocess
module.
import subprocess
import time
argument = '...'
proc = subprocess.Popen(['python', 'bar.py', argument], shell=True)
time.sleep(3) # <-- There's no time.wait, but time.sleep.
pid = proc.pid # <--- access `pid` attribute to get the pid of the child process.
To terminate the process, you can use terminate
method or kill
. (No need to use external kill
program)
proc.terminate()