Path: csiph.com!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed5.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path: <ian@feete.org>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.004
X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'f.close()': 0.07; 'filename': 0.07; 'filenames': 0.07; '"w")': 0.09; 'filenames:': 0.09; 'subject:Function': 0.09; 'extension': 0.13; 'extensions': 0.13; 'duplicates': 0.16; 'from:addr:ian': 0.16; 'guys,': 0.16; 'set()': 0.16; 'skip:" 70': 0.16; 'wrote:': 0.17; 'module': 0.19; 'skip:" 40': 0.20; 'trying': 0.21; 'import': 0.21; 'header:In- Reply-To:1': 0.25; 'header:User-Agent:1': 0.26; 'ext': 0.27; 'list:': 0.27; 'received:208.97': 0.29; 'received:208.97.132': 0.29; 'received:dreamhost.com': 0.29; 'received:g.dreamhost.com': 0.29; "i'm": 0.29; 'function': 0.30; 'code': 0.31; 'etc.)': 0.32; 'print': 0.32; 'to:addr:python-list': 0.33; 'path': 0.35; 'should': 0.36; 'subject:: ': 0.38; 'files': 0.38; 'skip:o 20': 0.38; 'instead': 0.39; 'to:addr:python.org': 0.39; 'received:192': 0.39; 'received:192.168': 0.40; 'you.': 0.61; 'containing': 0.61; 'received:208': 0.63; 'here': 0.65; 'subject:content': 0.84; 'examine': 0.95
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=feete.org; h=message-id :date:from:mime-version:to:subject:references:in-reply-to :content-type:content-transfer-encoding; s=feete.org; bh=gkXaKMF HmkY//pDtMDj3TqREPNI=; b=b49IHvecp+JKCKl6a3+Gyvd/WfOHs8g3YiYaCEb 6y3daJYFc9KNidhbv+HOBi4fwcc212z9O5K6/aqyP+mg6y/XiSDjlaZgv6/PT4Vm FuSLsrNClbocgel8LTcHKobHbttDH5eqh/ve9trY373GF86T38gmXx/gFiue2+jt WzhI=
Date: Thu, 06 Sep 2012 16:06:35 +0100
From: Ian Foote <ian@feete.org>
User-Agent: Mozilla/5.0 (X11; Linux i686; rv:15.0) Gecko/20120827 Thunderbird/15.0
MIME-Version: 1.0
To: python-list@python.org
Subject: Re: Function for examine content of directory
References: <feae1d5a-c477-4e21-8136-c14e38672cb9@googlegroups.com>
In-Reply-To: <feae1d5a-c477-4e21-8136-c14e38672cb9@googlegroups.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <http://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.307.1346944006.27098.python-list@python.org>
Lines: 28
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1346944006 news.xs4all.nl 6945 [2001:888:2000:d::a6]:34936
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:28607

On 06/09/12 15:56, Tigerstyle wrote:
> Hi guys,
>
> I'm trying to write a module containing a function to examine the contents of the current working directory and print out a count of how many files have each extension (".txt", ".doc", etc.)
>   
> This is the code so far:
> --
> import os
>
> path = "v:\\workspace\\Python2_Homework03\\src\\"
> dirs = os.listdir( path )
> filenames = {"this.txt", "that.txt", "the_other.txt","this.doc","that.doc","this.pdf","first.txt","that.pdf"}
> extensions = []
Try using a set here instead of a list:
     extensions = set()
> for filename in filenames:
>      f = open(filename, "w")
>      f.write("Some text\n")
>      f.close()
>      name , ext = os.path.splitext(f.name)
>      extensions.append(ext)
and use:
         extensions.add(ext)

This should take care of duplicates for you.

Regards,
Ian