Get subprocess error output from shell command

From	Gnarlodious <gnarlodious@gmail.com>
Newsgroups	comp.lang.python
Subject	Get subprocess error output from shell command
Date	2011-04-02 20:07 -0700
Organization	http://groups.google.com
Message-ID	<dc8e1dcd-303c-4e07-bdda-1b12277976f0@f31g2000pri.googlegroups.com> (permalink)

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I'm running a shell command like:
plutil -convert xml1 "~/Library/Preferences/iCab/iCab 4 Bookmarks"

Getting error:
~/Library/Preferences/iCab/iCab 4 Bookmarks: Permission denied

How would I capture this error using a method of subprocess?

I read the doc at
http://docs.python.org/release/3.0.1/library/subprocess.html

but confess I don't understand it.

-- Gnarlie
http://Gnarlodious.com/

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Get subprocess error output from shell command Gnarlodious <gnarlodious@gmail.com> - 2011-04-02 20:07 -0700
  Re: Get subprocess error output from shell command Benjamin Kaplan <benjamin.kaplan@case.edu> - 2011-04-02 23:25 -0400
    Re: Get subprocess error output from shell command Gnarlodious <gnarlodious@gmail.com> - 2011-04-02 20:36 -0700
  Re: Get subprocess error output from shell command Chris Rebert <clp2@rebertia.com> - 2011-04-02 20:29 -0700
    Re: Get subprocess error output from shell command Gnarlodious <gnarlodious@gmail.com> - 2011-04-02 20:50 -0700
      Re: Get subprocess error output from shell command Benjamin Kaplan <benjamin.kaplan@case.edu> - 2011-04-03 00:03 -0400
      Re: Get subprocess error output from shell command Chris Rebert <clp2@rebertia.com> - 2011-04-02 21:10 -0700
    Re: Get subprocess error output from shell command Gnarlodious <gnarlodious@gmail.com> - 2011-04-02 21:00 -0700
      Re: Get subprocess error output from shell command Chris Rebert <clp2@rebertia.com> - 2011-04-02 21:14 -0700

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