[mod_python] Running subprocesses

Jorey Bump list at joreybump.com
Wed Oct 4 08:58:44 EDT 2006

Ronald Levine wrote:
> I want my Python script, running under mod_python/publisher, to be
> able to invoke disk-resident C programs using os.popen, etc. , and
> receive their stdout, etc.  It does not seem to be working for me. Are
> there some fundamental restrictions that preclude my plan?

Here's what I do when I need to read stdout & stderr combined:

import os

def index():
     # os.popen4 combines stdout & stderr for reading
     w, r = os.popen4('du -sh /tmp')
     response = r.readlines()
     return ''.join(response)

If you don't want to include stderr, use os.popen2. If you want it in a 
separate object, use os.popen3 (w, r, e = os.popen3('command')).

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