python subprocess output to list or file

Question

I want to run the following bash command in Python 3:

ls -l

I know that I can do the following:

from subprocess import call         


        

Answer 1

Read about Popen. the set you asked for you get with

import subprocess
proc = subprocess.Popen(['ls','-l'],stdout=subprocess.PIPE,stderr=subprocess.PIPE)
myset=set(proc.stdout)

or do something like

for x in proc.stdout : print x

and the same for stderr

you can examine the state of the process with

proc.poll() 

or wait for it to terminate with

proc.wait()

also read

read subprocess stdout line by line