execute parallel command in python

Question

I'm trying to execute multiple linux commands using Python. Currently my script is

    import os
    os.system('cmd1')
    os.system('cmd2')
    os.system('cmd3')
    os.system('cmd4')

I'm wondering if there's a way to execute cmd1 and cmd2 in parallel. After cmd1 and cmd2 finishes, the system will execute cmd3 and cmd4? Thanks!

Welcome to StackOverflow. Please read and follow the posting guidelines in the help documentation. [on topic](http://stackoverflow.com/help/on-topic) and [how to ask](http://stackoverflow.com/help/how-to-ask) apply here. StackOverflow is not a design, coding, research, or tutorial service. — Prune, Jul 28 '17 at 21:30
More to the point, your browser search should have given you a hit for the [multiprocessing](https://stackoverflow.com/questions/3842237/parallel-processing-in-python#3846686) package. — Prune, Jul 28 '17 at 21:31
Actually, [subprocess](https://docs.python.org/2/library/subprocess.html) should also work and be enough to spawn them in parallel. See this answer: https://stackoverflow.com/questions/9743838/python-subprocess-in-parallel — Carlo Mazzaferro, Jul 28 '17 at 21:39

score 0 · Answer 1 · answered Jul 28 '17 at 21:40

0

Use os.fork() and run the two system commands in two children. Use os.waitpid() on the two children before executing cmd3.

answered Jul 28 '17 at 21:40

madscientist159

1 Answers1