Re: Is Python a commercial proposition ?

From	Roy Smith <roy@panix.com>
Newsgroups	comp.lang.python
Subject	Re: Is Python a commercial proposition ?
Date	2012-07-31 08:04 -0400
Organization	PANIX Public Access Internet and UNIX, NYC
Message-ID	<roy-D73DAF.08045731072012@news.panix.com> (permalink)
References	(2 earlier) <mailman.2713.1343628439.4697.python-list@python.org> <jv64j2$g2n$1@reader1.panix.com> <50173d9c$0$29978$c3e8da3$5496439d@news.astraweb.com> <7x62941qtc.fsf@ruckus.brouhaha.com> <50177b4d$0$29867$c3e8da3$5496439d@news.astraweb.com>

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In article <50177b4d$0$29867$c3e8da3$5496439d@news.astraweb.com>,
 Steven D'Aprano <steve+comp.lang.python@pearwood.info> wrote:

> Do they consider that perhaps there are alternatives to threads?

There's basically two reasons people use threads.

First is because it's a convenient way to multiplex short-lived tasks on 
a single processor.  What people tend to forget is that we managed to do 
that before there were threads.  Event loops still work perfectly fine.  
For an interesting example, http://www.gevent.org/.

Second is because we have multiple long-lived, compute-bound tasks and 
want to be able to take advantage of multiple processors.  For that, 
multiprocessing works just fine most of the time.  And multiprocess has 
the advantage over multithreading in that the processes can run on 
different machines, so you're not limited by the number of cores you can 
get on a single CPU.

What multiprocessing doesn't give you is fine-grain task switching.  So 
we're left with the set of jobs which consist of many (but not more than 
the number of cores on one CPU) compute-bound tasks, that we know how to 
parallelize, and require fine-grain task switching.  Sure, that's an 
important set of jobs, but there's a whole huge world of computing that 
doesn't fit into that box.

Thread

Is Python a commercial proposition ? lipska the kat <lipska@yahoo.co.uk> - 2012-07-29 17:01 +0100
  Re: Is Python a commercial proposition ? Michael Hrivnak <mhrivnak@hrivnak.org> - 2012-07-29 13:13 -0400
    Re: Is Python a commercial proposition ? Bernd Waterkamp <Bernd-Waterkamp@web.de> - 2012-07-29 21:43 +0200
    Re: Is Python a commercial proposition ? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-07-29 23:47 +0200
  Re: Is Python a commercial proposition ? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-07-29 18:43 +0100
  counting source lines (was: Is Python a commercial proposition ?) Stefan Behnel <stefan_ml@behnel.de> - 2012-07-29 19:49 +0200
  Re: Is Python a commercial proposition ? Brandon Schaffer <bschaffer13@gmail.com> - 2012-07-29 11:50 -0600
  Re: Is Python a commercial proposition ? Tim Chase <python.list@tim.thechases.com> - 2012-07-29 13:28 -0500
  Re: Is Python a commercial proposition ? Andrew Cooper <amc96@cam.ac.uk> - 2012-07-29 19:34 +0100
  Re: Is Python a commercial proposition ? Stefan Behnel <stefan_ml@behnel.de> - 2012-07-29 20:38 +0200
  Re: Is Python a commercial proposition ? Terry Reedy <tjreedy@udel.edu> - 2012-07-29 15:38 -0400
  Re: Is Python a commercial proposition ? Aled Evans <aled.r.evans@gmail.com> - 2012-07-29 12:54 -0700
  Re: Is Python a commercial proposition ? Rodrick Brown <rodrick.brown@gmail.com> - 2012-07-29 20:12 -0400
  Re: Is Python a commercial proposition ? Andrew Berg <bahamutzero8825@gmail.com> - 2012-07-29 19:52 -0500
  Re: Is Python a commercial proposition ? Rodrick Brown <rodrick.brown@gmail.com> - 2012-07-29 22:31 -0400
    Re: Is Python a commercial proposition ? Paul Rubin <no.email@nospam.invalid> - 2012-07-29 20:03 -0700
    Re: Is Python a commercial proposition ? alex23 <wuwei23@gmail.com> - 2012-07-30 17:45 -0700
  Re: Is Python a commercial proposition ? Stefan Behnel <stefan_ml@behnel.de> - 2012-07-30 08:07 +0200
    Re: Is Python a commercial proposition ? Grant Edwards <invalid@invalid.invalid> - 2012-07-30 14:09 +0000
      Re: Is Python a commercial proposition ? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-07-31 02:06 +0000
        Re: Is Python a commercial proposition ? Paul Rubin <no.email@nospam.invalid> - 2012-07-30 21:45 -0700
          Re: Is Python a commercial proposition ? Stefan Behnel <stefan_ml@behnel.de> - 2012-07-31 07:27 +0200
          Re: Is Python a commercial proposition ? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-07-31 06:29 +0000
            Re: Is Python a commercial proposition ? Roy Smith <roy@panix.com> - 2012-07-31 08:04 -0400
  Re: Is Python a commercial proposition ? Chris Angelico <rosuav@gmail.com> - 2012-07-30 17:52 +1000
    Re: Is Python a commercial proposition ? Roy Smith <roy@panix.com> - 2012-07-30 09:06 -0400
      Re: Is Python a commercial proposition ? lipska the kat <lipska@yahoo.co.uk> - 2012-07-30 14:37 +0100
        Re: Is Python a commercial proposition ? David <bouncingcats@gmail.com> - 2012-07-31 23:52 +1000
          Re: Is Python a commercial proposition ? lipska the kat <lipska@yahoo.co.uk> - 2012-07-31 18:27 +0100
            Re: Is Python a commercial proposition ? David <bouncingcats@gmail.com> - 2012-08-01 09:31 +1000
            Re: Is Python a commercial proposition ? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-01 09:06 +0100
              Re: Is Python a commercial proposition ? lipska the kat <lipska@yahoo.co.uk> - 2012-08-01 09:15 +0100
                Re: Is Python a commercial proposition ? David <bouncingcats@gmail.com> - 2012-08-01 21:59 +1000
                Re: Is Python a commercial proposition ? Stefan Behnel <stefan_ml@behnel.de> - 2012-08-01 14:32 +0200
                Re: Is Python a commercial proposition ? David <bouncingcats@gmail.com> - 2012-08-02 13:10 +1000
                Re: Is Python a commercial proposition ? lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-02 09:17 +0100
                Re: Is Python a commercial proposition ? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-02 09:09 +0100
                RE: Is Python a commercial proposition ? "Prasad, Ramit" <ramit.prasad@jpmorgan.com> - 2012-08-03 06:51 +0000
                Re: Is Python a commercial proposition ? Stefan Behnel <stefan_ml@behnel.de> - 2012-08-03 11:34 +0200
  Re: Is Python a commercial proposition ? Tim Chase <python.list@tim.thechases.com> - 2012-07-30 06:09 -0500
  Re: Is Python a commercial proposition ? rusi <rustompmody@gmail.com> - 2012-07-30 09:25 -0700
  Re: Is Python a commercial proposition ? Emile van Sebille <emile@fenx.com> - 2012-07-30 10:36 -0700
  RE: Is Python a commercial proposition ? "Prasad, Ramit" <ramit.prasad@jpmorgan.com> - 2012-07-30 18:26 +0000
  Re: Is Python a commercial proposition ? Chris Withers <chris@python.org> - 2012-08-23 22:46 +0100
    Re: Is Python a commercial proposition ? lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-24 12:03 +0100

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