How to catch a line with Popen

From	TheSaint <nobody@nowhere.net.no>
Newsgroups	comp.lang.python
Subject	How to catch a line with Popen
Followup-To	comp.lang.python
Date	2011-05-29 00:01 +0800
Organization	Aioe.org NNTP Server
Message-ID	<irr69j$6c1$1@speranza.aioe.org> (permalink)

Followups directed to: comp.lang.python

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Hello.
I'm looking into subprocess.Popen docs.
I've launch the program with its arguments and that's smooth. I'm expecting 
to read the output by *comunicate()* at every line that prgram may blow 
during the process, but the output is given only when the child process is 
ended.
I'd like to process the lines to display an information in percentage during 
the running time of the child. Sorry but I'm poor of know-how, so I'm stuck 
over to find a clue.

-- 
goto /dev/null

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How to catch a line with Popen TheSaint <nobody@nowhere.net.no> - 2011-05-29 00:01 +0800
  Re: How to catch a line with Popen Nobody <nobody@nowhere.com> - 2011-05-28 23:15 +0100
  Re: How to catch a line with Popen Tim Roberts <timr@probo.com> - 2011-05-28 16:32 -0700
    Re: How to catch a line with Popen TheSaint <nobody@nowhere.net.no> - 2011-05-29 18:02 +0800
      Re: How to catch a line with Popen Chris Rebert <clp2@rebertia.com> - 2011-05-29 03:26 -0700
        Re: How to catch a line with Popen TheSaint <nobody@nowhere.net.no> - 2011-05-29 21:52 +0800
          Re: How to catch a line with Popen TheSaint <nobody@nowhere.net.no> - 2011-05-29 22:13 +0800
          Re: How to catch a line with Popen Chris Torek <nospam@torek.net> - 2011-05-30 01:02 +0000
            Re: How to catch a line with Popen TheSaint <nobody@nowhere.net.no> - 2011-05-30 23:29 +0800
              Re: How to catch a line with Popen Chris Torek <nospam@torek.net> - 2011-05-30 21:33 +0000
                Re: How to catch a line with Popen TheSaint <nobody@nowhere.net.no> - 2011-05-31 19:33 +0800

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