How to use `subprocess` command with pipes

Question

I want to use subprocess.check_output() with ps -A | grep \'process_name\'. I tried various solutions but so far nothing worked. Can someone guide

Answer 1

Using subprocess.run

import subprocess

ps = subprocess.run(['ps', '-A'], check=True, capture_output=True)
processNames = subprocess.run(['grep', 'process_name'], input=ps.stdout)
print(processNames.stdout)