There are two new convenience functions in the subprocess module since
Python 3.0, getstatusoutput and getoutput. These are UNIX ONLY functions
(as per note "# NB This only works (and is only relevant) for UNIX." in
subprocess.py)

I believe the documentation page
http://docs.python.org/3.0/library/subprocess.html does not reflect this
sufficiently (not sure it does at all).

I suggest a note should be added saying "Availability: UNIX" to the two
functions mentioned.