python - subprocess.Popen().pid return the pid of the parent script

Question

I am trying to run a Python script from another Python script, and getting its pid so I can kill it later.

I tried subprocess.Popen() with

Answer 1

So run it directly without a shell:

proc = subprocess.Popen(['python', './script.py'])

By the way, you may want to consider changing the hardcoded 'python' to sys.executable. Also, you can use proc.kill() to kill the process rather than extracting the PID and using that; furthermore, even if you did need to kill by PID, you could use os.kill to kill the process rather than spawning another command.