Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed4a.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 0.002 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'from:addr:yahoo.co.uk': 0.04; 'output': 0.05; 'sys': 0.07; 'default.': 0.09; 'expression:': 0.09; 'lawrence': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'subject:2.7': 0.09; 'python': 0.11; 'language.': 0.14; 'did:': 0.16; 'prepared.': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'language': 0.16; 'wrote:': 0.18; 'trying': 0.19; 'import': 0.22; 'header:User-Agent:1': 0.23; 'precise': 0.24; 'earlier': 0.24; 'header:X-Complaints-To:1': 0.27; 'header:In-Reply-To:1': 0.27; 'gives': 0.31; "skip:' 10": 0.31; 'once,': 0.31; 'url:python': 0.33; 'moment': 0.34; 'but': 0.35; 'url:org': 0.36; 'url:library': 0.38; 'to:addr:python-list': 0.38; 'bad': 0.39; 'to:addr:python.org': 0.39; 'either': 0.39; 'received:org': 0.40; 'worry': 0.60; 'numbers': 0.61; 'url:3': 0.61; 'simply': 0.61; 'our': 0.64; 'subject:more': 0.64; 'more': 0.64; 'different': 0.65; 'charset:windows-1252': 0.65; 'between': 0.67; 'received:2': 0.84 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Mark Lawrence Subject: Re: str more precise in 3 as 2.7 Date: Wed, 29 Apr 2015 12:50:59 +0100 References: <87twvzch2u.fsf@Equus.decebal.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: host-2-98-195-171.as13285.net User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 In-Reply-To: <87twvzch2u.fsf@Equus.decebal.nl> X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.20+ 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: 40 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1430308275 news.xs4all.nl 2842 [2001:888:2000:d::a6]:35132 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:89542 On 29/04/2015 12:24, Cecil Westerhof wrote: > I am trying to make my modules also work under Python 3. I found that > str is more precise in Python 3. The expression: > str(134 / 6.0) > gives in 2.7.8: > '22.3333333333' > and in 3.4.1: > '22.333333333333332' > > Was not very hard to solve: > if python_version == 3: > output06[5] = '22.333333333333332' > output10[5] = '23.333333333333332' > output10[8] = '24.77777777777778' > > Earlier I did: > import sys > > # For when the difference between 2 and 3 is important > python_version = sys.version_info[0] > > At the moment I use it only once, but it is never bad to be prepared. > They simply output different numbers of digits by default. Just control the number of digits that you want to see and in this case you needn't worry again about Python 2 vs 3 differences. See either https://docs.python.org/3/library/string.html#formatspec or https://docs.python.org/3/library/stdtypes.html#printf-style-string-formatting -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence