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Re: Py-dea: Streamline string literals now!

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From Ian Kelly <ian.g.kelly@gmail.com>
Date Wed, 28 Dec 2011 13:52:31 -0700
Subject Re: Py-dea: Streamline string literals now!
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On Wed, Dec 28, 2011 at 12:36 PM, Rick Johnson
<rantingrickjohnson@gmail.com> wrote:
> My point was... while Greg's idea is nice, it is not the answer.
> HOWEVER, he did find the perfect char, and that char is the pipe! -->
> |
>
> mlstr = |||
> this is a
> multi line sting that is
> delimited by "triple pipes". Or we
> could just 'single pipes' if we like, however, i think
> the "triple pipe' is easier to see. Since the pipe char
> is so rare in Python source, it becomes the obvious
> choice. And, best of all, no more worries about
> "embedded quotes". YAY!
> |||
>
> slstr = |this is a single line string|
>
> The point is people, we should be using string delimiters that are
> ANYTHING besides " and '. Stop being a sheep and use your brain!

So those who do shell scripting from Python might replace this:

subprocess.call("cat {0} | awk '/foo|bar/ {print $3;}' | sort | uniq
>{1}".format(infile, outfile), shell=True)

with this:

subprocess.call(|cat {0} \| awk '/foo\|bar/ {print $3;}' \| sort \|
uniq >{1}|.format(infile, outfile), shell=True)

or if we combine Rick's string escaping proposal:

subprocess.call(|cat {0} <PIPE> awk '/foo<PIPE>bar/ {print $3;}'
<PIPE> sort <PIPE> uniq <GT>{1}|.format(infile, outfile), shell=True)

Yeah, that's so much better.  I especially like how nice and readable
the regex is now.

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Thread

Py-dea: Streamline string literals now! Rick Johnson <rantingrickjohnson@gmail.com> - 2011-12-27 19:49 -0800
  Re: Py-dea: Streamline string literals now! Chris Angelico <rosuav@gmail.com> - 2011-12-28 15:17 +1100
    Re: Py-dea: Streamline string literals now! Rick Johnson <rantingrickjohnson@gmail.com> - 2011-12-27 20:36 -0800
  Re: Py-dea: Streamline string literals now! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-28 04:20 +0000
  Re: Py-dea: Streamline string literals now! Rick Johnson <rantingrickjohnson@gmail.com> - 2011-12-27 21:34 -0800
    Re: Py-dea: Streamline string literals now! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-28 06:58 +0000
      Re: Py-dea: Streamline string literals now! Rick Johnson <rantingrickjohnson@gmail.com> - 2011-12-28 11:36 -0800
        Re: Py-dea: Streamline string literals now! Dominic Binks <dbinks@codeaurora.org> - 2011-12-28 12:10 -0800
        Re: Py-dea: Streamline string literals now! Lie Ryan <lie.1296@gmail.com> - 2011-12-29 07:13 +1100
        Re: Py-dea: Streamline string literals now! Ian Kelly <ian.g.kelly@gmail.com> - 2011-12-28 13:52 -0700
        Re: Py-dea: Streamline string literals now! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-12-28 22:54 +0000
          Re: Py-dea: Streamline string literals now! Chris Angelico <rosuav@gmail.com> - 2011-12-29 10:08 +1100
          Re: Py-dea: Streamline string literals now! Dan Sommers <dan@tombstonezero.net> - 2011-12-29 01:44 +0000
          Re: Py-dea: Streamline string literals now! Lie Ryan <lie.1296@gmail.com> - 2011-12-30 10:19 +1100
          Re: Py-dea: Streamline string literals now! Chris Angelico <rosuav@gmail.com> - 2011-12-30 10:24 +1100
    Re: Py-dea: Streamline string literals now! Chris Angelico <rosuav@gmail.com> - 2011-12-28 18:47 +1100
    Re: Py-dea: Streamline string literals now! Lie Ryan <lie.1296@gmail.com> - 2011-12-29 07:53 +1100
    Re: Py-dea: Streamline string literals now! python@bdurham.com - 2011-12-28 16:03 -0500
    Re: Py-dea: Streamline string literals now! Nathan Rice <nathan.alexander.rice@gmail.com> - 2011-12-28 16:24 -0500
    Re: Py-dea: Streamline string literals now! Chris Angelico <rosuav@gmail.com> - 2011-12-29 08:42 +1100
    Re: Py-dea: Streamline string literals now! Nathan Rice <nathan.alexander.rice@gmail.com> - 2011-12-28 17:24 -0500
    Re: Py-dea: Streamline string literals now! Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2011-12-29 00:00 -0500

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