[Tutor] How to list/process files with identical character strings

[mark murphy]

Hi Danny, Marc, Peter and Alex,

Thanks for the responses!  Very much appreciated.

I will take these pointers and see what I can pull together.

Thanks again to all of you for taking the time to help!

Cheers,
Mark


On Tue, Jun 24, 2014 at 4:39 PM, Danny Yoo <dyoo at hashcollision.org> wrote:

> The sorting approach sounds reasonable.  We might even couple it with
> itertools.groupby() to get the consecutive grouping done for us.
>
>     https://docs.python.org/2/library/itertools.html#itertools.groupby
>
>
> For example, the following demonstrates that there's a lot that the
> library will do for us that should apply directly to Mark's problem:
>
> #########################################
> import itertools
> import random
>
> def firstTwoLetters(s): return s[:2]
>
> grouped = itertools.groupby(
>     sorted(open('/usr/share/dict/words')),
>     key=firstTwoLetters)
>
> for k, g in grouped:
>     print k, list(g)[:5]
> #########################################
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-- 
Mark S. Murphy
Alumnus
Department of Geography
msmurphy at alumni.unc.edu
951-252-4325
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