Re: Powerful perl paradigm I don't find in python

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From	Wolfgang Maier <wolfgang.maier@biologie.uni-freiburg.de>
Newsgroups	comp.lang.python
Subject	Re: Powerful perl paradigm I don't find in python
Date	Fri, 15 Jan 2016 11:42:24 +0100
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On 15.01.2016 10:43, Peter Otten wrote:
> Charles T. Smith wrote:
>
>> while ($str != $tail) {
>>      $str ~= s/^(head-pattern)//;
>>      use ($1);
>> }
>
> For those whose Perl's a little rusty: what does this do?
> A self-contained example might also be useful...
>

Right, an explanation would certainly get you a lot more responses.

If I'm guessing correctly what the snippet is supposed to do (and, yes, 
my Perl definitely is rusty), isn't the Python equivalent of the regex 
part of your question fairly obvious if you're using the re module:

things = []
while some_str != tail:
     m = re.match(pattern_str, some_str)
     things.append(some_str[:m.end()])
     some_str = some_str[m.end():]

# do something with things

I have no idea why you'd want to *import* all the things parsed out of 
some_str, but for this part you may look at importlib.import_module.

P.S.: the while loop above never ends if tail is not in some_str, but I 
guess your Perl snippet has the same problem?

Thread

Powerful perl paradigm I don't find in python "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-01-15 09:24 +0000
  Re: Powerful perl paradigm I don't find in python Peter Otten <__peter__@web.de> - 2016-01-15 10:43 +0100
    Re: Powerful perl paradigm I don't find in python Michael Vilain <vilain@NOspamcop.net> - 2016-01-15 02:20 -0800
  Re: Powerful perl paradigm I don't find in python Wolfgang Maier <wolfgang.maier@biologie.uni-freiburg.de> - 2016-01-15 11:42 +0100
    Re: Powerful perl paradigm I don't find in python "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-01-15 11:04 +0000
      Re: Powerful perl paradigm I don't find in python "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-01-15 11:06 +0000
      Re: Powerful perl paradigm I don't find in python Wolfgang Maier <wolfgang.maier@biologie.uni-freiburg.de> - 2016-01-15 14:20 +0100
        Re: Powerful perl paradigm I don't find in python "Charles T. Smith" <cts.private.yahoo@gmail.com> - 2016-01-18 13:05 +0000
          Re: Powerful perl paradigm I don't find in python Wolfgang Maier <wolfgang.maier@biologie.uni-freiburg.de> - 2016-01-18 14:33 +0100
      Re: Powerful perl paradigm I don't find in python Peter Otten <__peter__@web.de> - 2016-01-15 14:34 +0100
  Re: Powerful perl paradigm I don't find in python Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2016-01-15 13:51 +0000
    Re: Powerful perl paradigm I don't find in python me <self@example.org> - 2016-01-15 15:20 +0000
  Re: Powerful perl paradigm I don't find in python Nathan Hilterbrand <nhilterbrand@gmail.com> - 2016-01-15 11:54 -0500

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