Re: Increase value in hash table

From	Vito De Tullio <vito.detullio@gmail.com>
Subject	Re: Increase value in hash table
Date	2013-01-24 19:30 +0100
References	<32d316a1-8551-4cb2-871f-b0a653c7d2f6@u7g2000yqg.googlegroups.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.1006.1359052235.2939.python-list@python.org> (permalink)

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moonhkt wrote:

> Data file
> V1
> V2
> V3
> V4
> V4
> V3
> 
> How to using count number of data ?
> 
> Output
> V1 = 1
> V2 = 1
> V3 =2
> V4 = 2

import collections

with open(data_file) as f:
        print(collections.Counter(f.readlines()))


it's a start

-- 
ZeD

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Increase value in hash table moonhkt <moonhkt@gmail.com> - 2013-01-22 23:26 -0800
  Re: Increase value in hash table Chris Rebert <clp2@rebertia.com> - 2013-01-22 23:34 -0800
    Re: Increase value in hash table moonhkt <moonhkt@gmail.com> - 2013-01-23 01:23 -0800
  Re: Increase value in hash table Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-01-23 10:12 +0000
    Re: Increase value in hash table Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-01-23 10:47 +0000
      Multiple postings [was Re: Increase value in hash table] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-01-23 21:54 +1100
        Re: Multiple postings [was Re: Increase value in hash table] rusi <rustompmody@gmail.com> - 2013-01-23 06:00 -0800
    Re: Increase value in hash table Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-01-23 10:46 +0000
    Re: Increase value in hash table Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-01-23 10:46 +0000
    Re: Increase value in hash table Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-01-23 10:47 +0000
  Re: Increase value in hash table moonhk <moonhkt@gmail.com> - 2013-01-23 23:33 +0800
    Re: Increase value in hash table moonhkt <moonhkt@gmail.com> - 2013-01-23 07:39 -0800
      Re: Increase value in hash table Dave Angel <d@davea.name> - 2013-01-23 17:35 -0500
  Re: Increase value in hash table Vito De Tullio <vito.detullio@gmail.com> - 2013-01-24 19:30 +0100

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