Re: Python solve problem with string operation

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From	giacomo boffi <pecore@pascolo.net>
Newsgroups	comp.lang.python
Subject	Re: Python solve problem with string operation
Date	Fri, 17 Jan 2014 01:17:12 +0100
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Nac Temha <naccttemha@gmail.com> writes:

> Hi everyone,
>
> I want to do operation with chars in the given string. Actually I want to
> grouping the same chars.
>
> For example;
>
> input : "344111133311222223377"
> operation-> (3)(44)(1111)(333)(11)(22222)(33)(77)
> output: "34131237"
>
>
>
> How can I do without list, regular expression. just using string operations. 
> Using an effective methods of python for this problem.


% cat a.py
def f(s,n):
    if s[n+1] == s[n]:
        return s[:n]+s[n+1:], n
    return s, n+1

i = "344111133311222223377"
n = 0

while n+1 != len(i):
    i, n = f(i, n)

print i
% python a.py
34131237
% 

-- 
your instructor is a mean person

Thread

Python solve problem with string operation Nac Temha <naccttemha@gmail.com> - 2014-01-17 00:24 +0200
  Re: Python solve problem with string operation John Gordon <gordon@panix.com> - 2014-01-16 22:30 +0000
    Re: Python solve problem with string operation Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-01-16 22:48 +0000
      Re: Python solve problem with string operation John Gordon <gordon@panix.com> - 2014-01-16 22:58 +0000
  Re: Python solve problem with string operation giacomo boffi <pecore@pascolo.net> - 2014-01-17 01:17 +0100
    Re: Python solve problem with string operation giacomo boffi <pecore@pascolo.net> - 2014-01-17 01:38 +0100
  Re: Python solve problem with string operation Denis McMahon <denismfmcmahon@gmail.com> - 2014-01-17 00:30 +0000
  Re: Python solve problem with string operation "Rhodri James" <rhodri@wildebst.org.uk> - 2014-01-17 01:05 +0000
  Re: Python solve problem with string operation Asaf Las <roegltd@gmail.com> - 2014-01-16 17:36 -0800

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