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Re: optomizations

References <mailman.944.1366680414.3114.python-list@python.org> <51760754$0$29872$c3e8da3$5496439d@news.astraweb.com>
Date 2013-04-23 14:08 +1000
Subject Re: optomizations
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.949.1366690116.3114.python-list@python.org> (permalink)

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On Tue, Apr 23, 2013 at 2:00 PM, Steven D'Aprano
<steve+comp.lang.python@pearwood.info> wrote:
> Also, you're searching the file system *for every line* in the input
> file. Pull this outside of the loop and have it run once:
>
>                     if not os.path.exists(outdir):
>                         os.makedirs(outdir)
>
> Likewise for opening and closing the output file, which you currently
> open and close it for every line. It only needs to be opened and closed
> once.

The outdir depends on the line, though. Hence my suggestion to retain
the open files in a dictionary.

ChrisA

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Thread

optomizations Rodrick Brown <rodrick.brown@gmail.com> - 2013-04-22 21:19 -0400
  Re: optomizations Roy Smith <roy@panix.com> - 2013-04-22 21:53 -0400
    Re: optomizations Dan Stromberg <drsalists@gmail.com> - 2013-04-22 20:15 -0700
    Re: optomizations Rodrick Brown <rodrick.brown@gmail.com> - 2013-04-23 00:20 -0400
      Re: optomizations Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-04-23 04:38 +0000
    Re: optomizations Chris Angelico <rosuav@gmail.com> - 2013-04-23 12:03 +1000
  Re: optomizations Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-04-23 04:00 +0000
    Re: optomizations Chris Angelico <rosuav@gmail.com> - 2013-04-23 14:08 +1000
    percent faster than format()? (was: Re: optomizations) Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2013-04-23 09:46 +0200
      Re: percent faster than format()? (was: Re: optomizations) Chris “Kwpolska” Warrick <kwpolska@gmail.com> - 2013-04-23 10:26 +0200
        Re: percent faster than format()? Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2013-04-23 16:57 +0200
          Re: percent faster than format()? Lele Gaifax <lele@metapensiero.it> - 2013-04-23 17:44 +0200
      Re: percent faster than format()? (was: Re: optomizations) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-04-23 14:36 +0000
        Re: percent faster than format()? (was: Re: optomizations) Chris Angelico <rosuav@gmail.com> - 2013-04-24 00:52 +1000

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