Re: I need algorithm for my task

From	Denis McMahon <denismfmcmahon@gmail.com>
Newsgroups	comp.lang.python
Subject	Re: I need algorithm for my task
Date	2014-11-06 04:39 +0000
Organization	A noiseless patient Spider
Message-ID	<m3eu2a$dhn$11@dont-email.me> (permalink)
References	<1962053862.5573720.1415210715670.JavaMail.zimbra@estudiantes.uci.cu> <mailman.15514.1415213345.18130.python-list@python.org> <m3eqc8$dhn$8@dont-email.me> <m3erp6$dhn$9@dont-email.me> <mailman.15534.1415247248.18130.python-list@python.org>

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On Thu, 06 Nov 2014 15:14:05 +1100, Chris Angelico wrote:

> On Thu, Nov 6, 2014 at 3:00 PM, Denis McMahon <denismfmcmahon@gmail.com>
> wrote:
>> def baseword(s):
>>     """find shortest sequence which repeats to generate s"""
>>     return s[0:["".join([s[0:x]for k in range(int(len(s)/x)+1)])[0:len
>> (s)]for x in range(1,len(s)+1)].index(s)+1]
> 
> That's hardly a PEP-8 compliant line, but I can help out a bit.
> 
> return s[0:[(s[0:x]*(len(s)//x+1))[0:len(s)]for x in
> range(1,len(s)+1)].index(s)+1]
> 
> That's still 83 characters without indentation, but it's close now.

l = len
r = range

but technically then it's no longer a one liner.

> I love the algorithm. Took me a bit of analysis (and inspection of
> partial results) to understand what your code's doing, but it's stupidly
> elegant and elegantly stupid.

:)

Well yes, building that list is a stupid way to solve the problem, but I 
can't see another way to do it in one line. It's an implementation of my 
algorithm 3 (which I think you described) but working from the other end 
as it were.

-- 
Denis McMahon, denismfmcmahon@gmail.com

Thread

Re: I need algorithm for my task MRAB <python@mrabarnett.plus.com> - 2014-11-05 18:49 +0000
  Re: I need algorithm for my task Denis McMahon <denismfmcmahon@gmail.com> - 2014-11-06 03:14 +0000
  Re: I need algorithm for my task Denis McMahon <denismfmcmahon@gmail.com> - 2014-11-06 03:36 +0000
    Re: I need algorithm for my task Chris Angelico <rosuav@gmail.com> - 2014-11-06 14:47 +1100
    Re: I need algorithm for my task Denis McMahon <denismfmcmahon@gmail.com> - 2014-11-06 04:00 +0000
      Re: I need algorithm for my task Chris Angelico <rosuav@gmail.com> - 2014-11-06 15:14 +1100
        Re: I need algorithm for my task Denis McMahon <denismfmcmahon@gmail.com> - 2014-11-06 04:39 +0000
          Re: I need algorithm for my task Jussi Piitulainen <jpiitula@ling.helsinki.fi> - 2014-11-06 09:59 +0200
            Re: I need algorithm for my task wxjmfauth@gmail.com - 2014-11-06 00:57 -0800

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