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Re: Weird problem matching with REs

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Date Mon, 30 May 2011 03:57:38 +1000
Subject Re: Weird problem matching with REs
From Chris Angelico <rosuav@gmail.com>
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On Mon, May 30, 2011 at 2:16 AM, Andrew Berg <bahamutzero8825@gmail.com> wrote:
>> Also, be sure to
>> use a raw string when composing REs, so you don't run into backslash
>> issues.
> How would I do that when grabbing strings from a config file (via the
> configparser module)? Or rather, if I have a predefined variable
> containing a string, how do change it into a raw string?
>

"Raw string" is slightly inaccurate. The Python "raw string literal"
syntax is just another form of string literal:

'apostrophe-delimited string'
"quote-delimited string"
"""triple-quote string
which may
go over
multiple lines"""
'''triple-apostrophe string'''
r'raw apostrophe string'
r"raw quote string"

They're all equivalent once you have the string object. The only
difference is how they appear in your source code. If you read
something from a config file, you get a string object directly, and
you delimit it with something else (end of line, or XML closing tag,
or whatever), so you don't have to worry about string quotes.

Chris Angelico

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Thread

Weird problem matching with REs Andrew Berg <bahamutzero8825@gmail.com> - 2011-05-29 06:45 -0500
  Re: Weird problem matching with REs Ben Finney <ben+python@benfinney.id.au> - 2011-05-29 23:00 +1000
    Re: Weird problem matching with REs Ben Finney <ben+python@benfinney.id.au> - 2011-05-29 23:03 +1000
    Re: Weird problem matching with REs Andrew Berg <bahamutzero8825@gmail.com> - 2011-05-29 08:29 -0500
  Re: Weird problem matching with REs Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-05-29 13:09 +0000
    Re: Weird problem matching with REs Andrew Berg <bahamutzero8825@gmail.com> - 2011-05-29 08:41 -0500
      Re: Weird problem matching with REs Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-05-29 14:18 +0000
        Re: Weird problem matching with REs Andrew Berg <bahamutzero8825@gmail.com> - 2011-05-29 09:35 -0500
          Re: Weird problem matching with REs John S <jstrickler@gmail.com> - 2011-05-29 08:48 -0700
            Re: Weird problem matching with REs Andrew Berg <bahamutzero8825@gmail.com> - 2011-05-29 11:16 -0500
              Re: Weird problem matching with REs John S <jstrickler@gmail.com> - 2011-05-29 09:45 -0700
            Re: Weird problem matching with REs Chris Angelico <rosuav@gmail.com> - 2011-05-30 03:57 +1000
      Re: Weird problem matching with REs Roy Smith <roy@panix.com> - 2011-05-29 11:19 -0400
        Re: Weird problem matching with REs Andrew Berg <bahamutzero8825@gmail.com> - 2011-05-29 10:31 -0500
          Re: Weird problem matching with REs Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-05-29 21:06 +0200

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