python subprocess and shlex

Question

I am trying to get the following python code to work, I am just not able to get the syntax to work. Can someone assist?

import subprocess
import shlex

subprocess.call(shlex.split('top -d 5 -n 1 -b -o %CPU | head -n 12 > output.txt'))

Multiple command in a pipeline will only work directly in `subprocess` if you use `shell=True`. Same applies to output redirection. — jasonharper, Jul 28 '18 at 13:31
You're probably better off reading this post to learn how to do pipe with `Popen`: https://stackoverflow.com/questions/13332268/python-subprocess-command-with-pipe — Robert Seaman, Jul 28 '18 at 13:32

Jay Webster · Accepted Answer · 2018-07-28T13:52:45.147

0

I got the below to work, Thanks for help!

import subprocess

subprocess.Popen("top -d 5 -n 1 -b -o %CPU | head -n 12 > output.txt",shell=True,stdout=subprocess.PIPE,stderr=subprocess.STDOUT)

edited Jul 28 '18 at 13:52

answered Jul 28 '18 at 13:47

Jay Webster

1 Answers1