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Re: DSLs in perl and python (Was sobering observation)

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From Peter Otten <__peter__@web.de>
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Subject Re: DSLs in perl and python (Was sobering observation)
Date Fri, 18 Mar 2016 14:22:25 +0100
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Rustom Mody wrote:

> On Friday, March 18, 2016 at 4:17:06 AM UTC+5:30, MRAB wrote:
>> Stick an "x" on the end of the regex: /something/x or s/old/new/x.
> 
> Thanks!
> 
> Is there somewhere a regexp 'introspection' API/capability available?
> 
> ie if the re looks like
> rexp = r"""
> # DSL (instantiation) for describing NYSE symbology
> ^
> (?P<scrip>	     [A-Z]*)     # The base scrip
> (?P<serchar>	     [.+-])?     # Series type char
> (?P<series>	     [A-Z])?     # Series
> (?P<issuedc>	     [#])?       # issued char indicator
> $		     		 # Thats all (there should be!)
> """
> 
> I would like to know that the named-groups are
> {scrip, serchar, series, issued}
> without doing match/search etc

Is that a Perl or a Python question? If the latter:

>>> r = re.compile(rexp, re.VERBOSE)
>>> r.groupindex
{'serchar': 2, 'issuedc': 4, 'scrip': 1, 'series': 3}

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sobering observation, python vs. perl "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-03-17 15:29 +0000
  Re: sobering observation, python vs. perl "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-03-17 15:40 +0000
    Re: sobering observation, python vs. perl Marko Rauhamaa <marko@pacujo.net> - 2016-03-17 17:48 +0200
      Re: sobering observation, python vs. perl "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-03-17 15:59 +0000
        Re: sobering observation, python vs. perl Marko Rauhamaa <marko@pacujo.net> - 2016-03-17 18:07 +0200
          Re: sobering observation, python vs. perl "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-03-17 16:15 +0000
  Re: sobering observation, python vs. perl Marko Rauhamaa <marko@pacujo.net> - 2016-03-17 17:47 +0200
    Re: sobering observation, python vs. perl "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-03-17 16:06 +0000
      Re: sobering observation, python vs. perl Marko Rauhamaa <marko@pacujo.net> - 2016-03-17 18:30 +0200
        Re: sobering observation, python vs. perl "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-03-17 16:32 +0000
  Re: sobering observation, python vs. perl srinivas devaki <mr.eightnoteight@gmail.com> - 2016-03-17 21:18 +0530
    Re: sobering observation, python vs. perl "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-03-17 16:15 +0000
  Re: sobering observation, python vs. perl Tim Chase <python.list@tim.thechases.com> - 2016-03-17 10:52 -0500
    Re: sobering observation, python vs. perl "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-03-17 16:08 +0000
      Re: sobering observation, python vs. perl Ethan Furman <ethan@stoneleaf.us> - 2016-03-17 09:21 -0700
        Re: sobering observation, python vs. perl "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-03-17 16:36 +0000
          Re: sobering observation, python vs. perl Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-17 17:09 +0000
          Re: sobering observation, python vs. perl Ethan Furman <ethan@stoneleaf.us> - 2016-03-17 10:26 -0700
            Re: sobering observation, python vs. perl "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-03-17 17:35 +0000
              Re: sobering observation, python vs. perl Ethan Furman <ethan@stoneleaf.us> - 2016-03-17 11:21 -0700
          DSLs in perl and python (Was sobering observation) Rustom Mody <rustompmody@gmail.com> - 2016-03-17 10:47 -0700
            Re: DSLs in perl and python (Was sobering observation) Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-17 22:22 +0000
            Re: DSLs in perl and python (Was sobering observation) MRAB <python@mrabarnett.plus.com> - 2016-03-17 22:43 +0000
              Re: DSLs in perl and python (Was sobering observation) Rustom Mody <rustompmody@gmail.com> - 2016-03-18 05:57 -0700
                Re: DSLs in perl and python (Was sobering observation) Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-03-18 15:18 +0200
                Re: DSLs in perl and python (Was sobering observation) Peter Otten <__peter__@web.de> - 2016-03-18 14:22 +0100
                Re: DSLs in perl and python (Was sobering observation) Rustom Mody <rustompmody@gmail.com> - 2016-03-18 19:07 -0700
                DSL design (was DSLs in perl and python) Rustom Mody <rustompmody@gmail.com> - 2016-03-29 06:28 -0700
                Re: DSL design (was DSLs in perl and python) Chris Angelico <rosuav@gmail.com> - 2016-03-30 00:41 +1100
                Re: DSL design (was DSLs in perl and python) Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-03-29 16:45 +0300
                Finding methods, was Re: DSL design (was DSLs in perl and python) Peter Otten <__peter__@web.de> - 2016-03-29 15:51 +0200
      Re: sobering observation, python vs. perl Marko Rauhamaa <marko@pacujo.net> - 2016-03-17 18:34 +0200
        Re: sobering observation, python vs. perl "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-03-17 16:42 +0000
          Re: sobering observation, python vs. perl Marko Rauhamaa <marko@pacujo.net> - 2016-03-17 19:08 +0200
            Re: sobering observation, python vs. perl "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-03-17 17:25 +0000
              Re: sobering observation, python vs. perl BartC <bc@freeuk.com> - 2016-03-17 17:53 +0000
                Re: sobering observation, python vs. perl Rustom Mody <rustompmody@gmail.com> - 2016-03-17 10:59 -0700
                Re: sobering observation, python vs. perl Marko Rauhamaa <marko@pacujo.net> - 2016-03-17 20:53 +0200
                Re: sobering observation, python vs. perl BartC <bc@freeuk.com> - 2016-03-17 19:06 +0000
                Re: sobering observation, python vs. perl Marko Rauhamaa <marko@pacujo.net> - 2016-03-17 21:11 +0200
            Re: sobering observation, python vs. perl Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-03-17 20:47 +0000
      Re: sobering observation, python vs. perl Peter Otten <__peter__@web.de> - 2016-03-18 10:26 +0100
      Re: sobering observation, python vs. perl Steven D'Aprano <steve@pearwood.info> - 2016-03-18 22:47 +1100

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