Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!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 0.005 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'sys': 0.05; 'bash': 0.07; 'item.': 0.07; 'python': 0.09; 'tab': 0.09; 'cc:addr:python-list': 0.10; 'ascending': 0.16; 'descending': 0.16; 'outputs': 0.16; 'task.': 0.16; 'translation': 0.16; 'wrote:': 0.17; 'followed': 0.20; 'sort': 0.21; 'import': 0.21; 'received:209.85.214.174': 0.21; 'cc:2**0': 0.23; 'solutions.': 0.23; "i've": 0.23; 'cc:no real name:2**0': 0.24; 'cc:addr:python.org': 0.25; 'header:In- Reply-To:1': 0.25; 'message-id:@mail.gmail.com': 0.27; 'asking': 0.32; 'implement': 0.32; 'file': 0.32; "skip:' 20": 0.32; 'print': 0.32; 'yours,': 0.33; 'skip:- 20': 0.34; 'received:google.com': 0.34; 'text': 0.34; 'list': 0.35; "won't": 0.35; 'received:209.85': 0.35; 'something': 0.35; 'stock': 0.36; 'received:209': 0.37; 'subject:: ': 0.38; 'received:209.85.214': 0.39; 'header:Received:5': 0.40; 'help': 0.40; 'july': 0.60; 'subject:, ': 0.61; 'containing': 0.61; 'kat': 0.91; 'subject:skip:E 10': 0.95 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=HVWUAlCsWyb6i947W0EPTmGV9iveTDMvF10MwReruV8=; b=Vs6jpbcwem7f4kBVf2RmVNBvuCopUCta96h9PBiouaKvP0KOmlxKsxNA0W2CInQ7Ry 9YnUA0VFSVwBXpbIeNqvN1VvHCmjv2V/qJqv2tSbc/1hLIR6ApjiF4FV1e3k3Y7KFyTl evvojrU8Zc0vRjac4igU0kFDMuT95CGIYa62vhKzQ3chPfREY5vZopvADGcScLOQTN+E AISys8F+HeS0QssPH0ms1bRj8FBWN07eamSHGLaD/WCohht8OyH9GluZVpL9i3arsFk/ Urx1o94ZmkHTOMv2sMhP2u1h3ip9ZbEWRZooCto4kaKimpee1+0opConWvEGH4UTNpX6 TyEw== MIME-Version: 1.0 In-Reply-To: <3-WdnYTg0r6XyZjNnZ2dnUVZ7sidnZ2d@bt.com> References: <3-WdnYTg0r6XyZjNnZ2dnUVZ7sidnZ2d@bt.com> Date: Wed, 18 Jul 2012 11:35:51 +0100 Subject: Re: Encapsulation, inheritance and polymorphism From: Arnaud Delobelle To: Lipska the Kat Content-Type: text/plain; charset=UTF-8 Cc: python-list@python.org X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 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: 24 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1342607761 news.xs4all.nl 6916 [2001:888:2000:d::a6]:48502 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:25562 On 17 July 2012 13:01, Lipska the Kat wrote: > Well I've set myself a task. > I have a text file containing a list of stock items > each line contains the number in stock followed by a tab followed by the > name of the item. I need to implement something that reads in the text file > and outputs the stock list in ascending or descending order of quantity. > > Please note I am NOT asking for solutions. > > In bash this is laughably trivial > sort -nr $1 | head -${2:-10} Here's a Python translation that won't help :) from sys import argv print ''.join(sorted(open(argv[1]), key=lambda l: -int(l.split('\t')[0]))[:10 if len(argv) < 3 else int(argv[2])]) Who said Python was readabl'y yours, -- Arnaud