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Re: Extracting subsequences composed of the same character

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On 03/31/2011 07:43 PM, candide wrote:
> "pyyythhooonnn --->  ++++"
>
> and you search for the subquences composed of the same character, here
> you get :
>
> 'yyy', 'hh', 'ooo', 'nnn', '---', '++++'

Or, if you want to do it with itertools instead of the "re" module:

 >>> s = "pyyythhooonnn ---> ++++"
 >>> from itertools import groupby
 >>> [c*length for c, length in ((k, len(list(g))) for k, g in 
groupby(s)) if length > 1]
['yyy', 'hh', 'ooo', 'nnn', '---', '++++']


-tkc

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Extracting subsequences composed of the same character candide <candide@free.invalid> - 2011-04-01 02:43 +0200
  Re: Extracting subsequences composed of the same character MRAB <python@mrabarnett.plus.com> - 2011-04-01 02:16 +0100
  Re: Extracting subsequences composed of the same character Roy Smith <roy@panix.com> - 2011-03-31 21:40 -0400
  Re: Extracting subsequences composed of the same character Tim Chase <python.list@tim.thechases.com> - 2011-03-31 20:58 -0500
  Re: Extracting subsequences composed of the same character Tim Chase <python.list@tim.thechases.com> - 2011-03-31 21:20 -0500
  Re: Extracting subsequences composed of the same character Terry Reedy <tjreedy@udel.edu> - 2011-04-01 00:18 -0400
  Re: Extracting subsequences composed of the same character candide <candide@free.invalid> - 2011-04-01 21:39 +0200

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