Path: csiph.com!usenet.pasdenom.info!goblin2!goblin.stu.neva.ru!newsfeed.xs4all.nl!newsfeed5.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.009 X-Spam-Evidence: '*H*': 0.98; '*S*': 0.00; 'python,': 0.02; 'python': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'sep': 0.09; 'language': 0.14; 'java.': 0.16; 're-written': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'skipped': 0.16; 'wrote:': 0.17; 'directory.': 0.17; 'duplicate': 0.17; 'shell': 0.18; 'either.': 0.22; 'programming': 0.23; 'linux': 0.24; 'machine': 0.24; 'script': 0.24; 'header:In-Reply- To:1': 0.25; 'header:User-Agent:1': 0.26; 'wrote': 0.26; 'opposed': 0.27; 'header:X-Complaints-To:1': 0.28; 'lines': 0.28; 'environment': 0.29; 'concise': 0.29; "d'aprano": 0.29; 'piece': 0.29; 'steven': 0.29; 'code': 0.31; 'from:addr:yahoo.co.uk': 0.32; 'getting': 0.33; '+0200,': 0.33; 'to:addr:python-list': 0.33; 'presence': 0.33; 'version': 0.34; 'something': 0.35; 'received:org': 0.36; 'but': 0.36; 'subject:: ': 0.38; 'mark': 0.38; 'files': 0.38; 'easier': 0.38; 'to:addr:python.org': 0.39; 'header:Received:5': 0.40; 'first': 0.61; 'relatively': 0.62; 'thomas': 0.62; 'more': 0.63; 'soon': 0.70; 'saw': 0.75; 'subject:For': 0.75; 'badly,': 0.84; 'rachel': 0.84; 'reminds': 0.84; 'sides.': 0.84; 'wheel': 0.84 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Mark Lawrence Subject: Re: For Counter Variable Date: Tue, 25 Sep 2012 08:59:23 +0100 References: <10965867-a44f-4146-aea2-fd1a1e8f8e3b@googlegroups.com> <5060DA00.10801@stoneleaf.us> <50616157$0$29997$c3e8da3$5496439d@news.astraweb.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: host-78-147-20-3.as13285.net User-Agent: Mozilla/5.0 (Windows NT 6.0; rv:15.0) Gecko/20120907 Thunderbird/15.0.1 In-Reply-To: <50616157$0$29997$c3e8da3$5496439d@news.astraweb.com> X-Antivirus: avast! (VPS 120924-1, 24/09/2012), Outbound message X-Antivirus-Status: Clean X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 33 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1348559933 news.xs4all.nl 6843 [2001:888:2000:d::a6]:45617 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:30040 On 25/09/2012 08:46, Steven D'Aprano wrote: > On Tue, 25 Sep 2012 07:53:55 +0200, Thomas Rachel wrote: > >> When learning Python, it often happend me to re-inven the wheel. But as >> soon as I saw the presence of something I re-wrote, I skipped my >> re-written version and used the built-in. > > And me. > > Not just Python either. The very first piece of code I wrote on a Linux > machine was a shell script that (very badly, and even more very slowly) > counted the number of files in a directory. 20 lines (if I remember > correctly) to duplicate a simple: > > ls | wc -l > > > It was a humbling lesson to always check what features a programming > environment or language offers before reinventing the wheel with four > sides. > > > Thankfully easier in a relatively concise language like Python as opposed to (say) Java. Which reminds me, in what version of Python are we getting the singletonMap? :) -- Cheers. Mark Lawrence.