Killing a script launched in a Process via os.system()

Question

I have a python script which launches several processes. Each process basically just calls a shell script:

from multiprocessing import Process
import os
imp         


        

Answer 1

Based on Stop reading process output in Python without hang?:

import os
import time
from subprocess import Popen

def start_process(n, stdout):
    # no need for `global logger` you don't assign to it
    command = [os.path.expanduser("~/Scripts/run.sh"), str(n)]
    logger.debug(command) # no need for if(debug); set logging level instead
    return Popen(command, stdout=stdout) # run directly

# no need to use threads; Popen is asynchronous 
with open('/tmp/scripts_output.txt') as file:
    processes = [start_process(i, file) for i in range(10)]

    # wait at most timeout seconds for the processes to complete
    # you could use p.wait() and signal.alarm or threading.Timer instead
    endtime = time.time() + timeout
    while any(p.poll() is None for p in processes) and time.time() < endtime:
        time.sleep(.04)

    # terminate unfinished processes
    for p in processes:
        if p.poll() is None:
            p.terminate()
            p.wait() # blocks if `kill pid` is ignored

Use p.wait(timeout) if it is available.