Question

How do you stop the output from subprocess.Popen from being output? Printing can sometimes be slow if there is a great deal of it.

Answer 1

If you want to totally throw it away:

import subprocess
import os
with open(os.devnull, 'w') as fp:
    cmd = subprocess.Popen(("[command]",), stdout=fp)

If you are using Python 2.5, you will need from __future__ import with_statement, or just don’t use with.