Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!aioe.org!feeder.news-service.com!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 0.000 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'python,': 0.01; 'subject:while': 0.07; 'python': 0.08; 'none:': 0.09; 'parsing': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:80.91.229.12': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'received:lo.gmane.org': 0.09; 'converting': 0.15; '"none"': 0.16; "'w',": 0.16; 'approach,': 0.16; 'bieber': 0.16; 'declaimed': 0.16; 'email addr:ix.netcom.com': 0.16; 'email name:wlfraed': 0.16; 'from:addr:ix.netcom.com': 0.16; 'from:addr:wlfraed': 0.16; 'from:name:dennis lee bieber': 0.16; 'input,': 0.16; 'received:66.245': 0.16; 'received:dsl.mindspring.com': 0.16; 'received:mindspring.com': 0.16; 'received:wlfraed': 0.16; 'stdout': 0.16; 'sys.stdout': 0.16; 'tasked': 0.16; 'url:netcom': 0.16; 'url:wlfraed': 0.16; 'wulfraed': 0.16; 'perl': 0.18; 'url:home': 0.21; 'wonder': 0.23; 'sep': 0.23; 'input': 0.24; 'preferred': 0.25; 'language.': 0.28; 'lee': 0.28; 'thu,': 0.28; 'exit': 0.29; 'print': 0.29; 'there': 0.33; 'to:addr:python-list': 0.33; "i've": 0.34; '(as': 0.34; 'consensus': 0.34; 'searches': 0.34; 'header:X-Complaints-To:1': 0.35; 'object': 0.35; 'charset :us-ascii': 0.36; 'but': 0.37; 'received:org': 0.38; 'some': 0.38; 'subject:: ': 0.39; 'ok,': 0.39; 'header:Mime-Version:1': 0.39; 'to:addr:python.org': 0.39; 'more': 0.60; 'skip:o 30': 0.63; 'note:': 0.68; 'soon': 0.72; 'dennis': 0.77 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Dennis Lee Bieber Subject: Re: idiomatic analogue of Perl's: while (<>) { ... } Date: Thu, 01 Sep 2011 22:19:20 -0700 Organization: > Bestiaria Support Staff < References: <20110901045650.GA3466@magic.hamla.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: user-11fb66t.dsl.mindspring.com X-Newsreader: Forte Agent 3.3/32.846 X-No-Archive: YES 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: 28 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1314940781 news.xs4all.nl 2429 [2001:888:2000:d::a6]:37932 X-Complaints-To: abuse@xs4all.nl Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:12614 On Thu, 1 Sep 2011 00:56:50 -0400, Sahil Tandon declaimed the following in gmane.comp.python.general: > I've been tasked with converting some programs from Perl -> Python, and > am (as will soon be obvious) new to the language. A few archive/google > searches were inconclusive on a consensus approach, which is OK, but I > just wonder if there is a more Python-esque way to do the following in > Python 2.7.1: > > %% > # unbuffer STDOUT > sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0) > > # process input, line-by-line, and print responses after parsing input > while 1: > rval = parse(raw_input()) > if rval == None: There is only ONE "None" object so the preferred method is if rval is None: Note: I don't see any exit handler/condition... -- Wulfraed Dennis Lee Bieber AF6VN wlfraed@ix.netcom.com HTTP://wlfraed.home.netcom.com/