batching out jobs to separate processes with python futures

batchjobs.py

#!/usr/local/bin/python3

import sys, os
from concurrent.futures import ProcessPoolExecutor

def osjob(cmd):
    print("running `{}`".format(cmd))
    os.system(cmd)
    print("finished `{}`".format(cmd))

if __name__ == '__main__':

    f = open(sys.argv[1])  # file containing list of shell commands
    jobs = [j.strip() for j in f.readlines()]
    f.close()

    workers = int(sys.argv[2])  # number of concurrent jobs to run

    result = []
    with ProcessPoolExecutor(max_workers=workers) as executor:
        for job in jobs:
            result.append(executor.submit(osjob, job))

    for r in result:
        r.result()