抑制 subprocess.Popen 的输出

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.

解决方案

如果你想彻底扔掉:

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

如果您使用的是 Python 2.5，则需要 from __future__ import with_statement，或者干脆不要使用 with.