Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.freenet.ag!news2.euro.net!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 0.085 X-Spam-Evidence: '*H*': 0.83; '*S*': 0.00; 'trailing': 0.07; 'preferable': 0.09; 'cases': 0.15; 'itertools': 0.16; 'meanwhile': 0.16; 'nick': 0.16; 'certainly': 0.17; '>>>': 0.18; 'comfortable': 0.20; 'subject:skip:i 10': 0.22; 'header:In-Reply-To:1': 0.25; 'message-id:@mail.gmail.com': 0.27; 'behaving': 0.29; 'boundary': 0.29; 'enforce': 0.29; 'skip:q 20': 0.29; 'whitespace': 0.29; "i'm": 0.29; 'e.g.': 0.30; 'code': 0.31; 'could': 0.32; 'null': 0.33; 'rid': 0.33; 'to:addr:python-list': 0.33; 'guys': 0.33; 'themselves': 0.33; 'hi,': 0.33; 'received:google.com': 0.34; 'fresh': 0.35; 'mine': 0.35; 'received:209.85.220': 0.35; 'received:209.85': 0.35; 'but': 0.36; 'turn': 0.36; 'best,': 0.37; 'does': 0.37; 'quite': 0.37; 'received:209': 0.37; 'subject:: ': 0.38; 'sure': 0.38; 'description': 0.39; 'to:addr:python.org': 0.39; 'space': 0.39; 'little': 0.39; 'header:Received:5': 0.40; 'your': 0.60; 'red': 0.60; 'love': 0.63; 'more': 0.63; 'complexity': 0.84; 'worth,': 0.84; 'heat': 0.91; 'subject:Good': 0.91 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 :content-type; bh=lQlFMCRbBOl1qL4W8bpEBNLadseFiGj2SCXYN7aePZo=; b=vQkSQnMsWOOdYjrqX/5nRx5FAaVheIhmg+nLeqaFe5z+jza4hsYyUyh9i9AyUlBUFr KMRS5GEL61VjJ7aRPjG5/Way2xB1tmRbCmtFOU7yQzejriKc2QVDOFDDp4zmR0bewf5l Vad0KV2ZQhkp8nY0KAI6lMBLrfbwN3QLdGru8CASCD8td9CnMZUUxknCAACifAsTsenl hFgKF2vLfUswzSqF0W2nFJVPHzCMFcwvgnzOKMvKbPsxqP8ivzFf830K7RelCEpxW05+ HsdO9h8swoRNONAB9aqeb+QpRS2D1nPlp7jPQ6BaPo+oW7TE1hZWjegyWyOV4xuN/TQS eyHQ== MIME-Version: 1.0 In-Reply-To: References: Date: Tue, 4 Dec 2012 22:08:34 +0100 Subject: Re: Good use for itertools.dropwhile and itertools.takewhile From: Vlastimil Brom To: python-list@python.org Content-Type: text/plain; charset=ISO-8859-1 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: 26 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1354655318 news.xs4all.nl 6990 [2001:888:2000:d::a6]:58554 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:34256 2012/12/4 Nick Mellor : > I love the way you guys can write a line of code that does the same as 20 of mine :) > I can turn up the heat on your regex by feeding it a null description or multiple white space (both in the original file.) I'm sure you'd adjust, but at the cost of a more complex regex. > Meanwhile takewith and dropwith are behaving themselves impeccably but my while loop has fallen over. > > Best, > Nick >> [...] > -- Hi, well, for what is it worth, both cases could be addressed quite easily, with little added complexity - e.g.: make the description part optional, allow multiple whitespace and enforce word boundary after the product name in order to get rid of the trailing whitespace in it: >>> re.findall(r"(?m)^([A-Z\s]+\b)(?:\s+(.*))?$", "CAPSICUM RED fresh from QLD\nCAPSICUM RED fresh from Queensland\nCAPSICUM RED") [('CAPSICUM RED', 'fresh from QLD'), ('CAPSICUM RED', 'fresh from Queensland'), ('CAPSICUM RED', '')] >>> However, it's certainly preferable to use a solution you are more comfortable with, e.g. the itertools one... regards, vbr