Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail From: Robin Becker Newsgroups: comp.lang.python Subject: Re: str(float) python 3 versus 2.7 Date: Tue, 24 May 2016 15:47:09 +0100 Lines: 16 Message-ID: References: <7c1af35c-1ac7-96c7-3cba-ab9c8e542d8e@chamonix.reportlab.co.uk> <38b36519-a231-6d76-bc5e-0e6d5f81808d@chamonix.reportlab.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: news.uni-berlin.de 8mTnR9a5Zjq15RvViBLa5wygub/29ycLViuxn/12rLCw== 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; 'essentially': 0.04; 'float': 0.05; 'trailing': 0.07; 'type,': 0.07; "'n'": 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; '2.7': 0.13; 'subject:python': 0.14; 'explicitly': 0.15; '2016': 0.16; '23,': 0.16; 'formatting.': 0.16; 'received:80.91.229.3': 0.16; 'received:io': 0.16; 'received:plane.gmane.org': 0.16; 'received:psf.io': 0.16; 'subject:versus': 0.16; 'wrote:': 0.16; '>>>': 0.20; 'strip': 0.22; 'am,': 0.23; 'header:In-Reply-To:1': 0.24; 'mon,': 0.24; 'header:User-Agent:1': 0.26; 'header:X-Complaints-To:1': 0.26; 'format,': 0.27; 'idea': 0.28; "can't": 0.32; 'subject:) ': 0.32; 'source': 0.33; 'though.': 0.33; "skip:' 20": 0.34; 'to:addr :python-list': 0.36; 'subject:: ': 0.37; 'received:org': 0.37; 'thought': 0.37; 'why': 0.39; 'format': 0.39; 'to:addr:python.org': 0.40; 'show': 0.62; 'believe': 0.66; 'received:109': 0.75; '..........': 0.84; 'becker': 0.84; 'imagine': 0.96 X-Injected-Via-Gmane: http://gmane.org/ X-Gmane-NNTP-Posting-Host: 109.174.168.73 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.1.0 In-Reply-To: X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Mailman-Original-Message-ID: <38b36519-a231-6d76-bc5e-0e6d5f81808d@chamonix.reportlab.co.uk> X-Mailman-Original-References: <7c1af35c-1ac7-96c7-3cba-ab9c8e542d8e@chamonix.reportlab.co.uk> Xref: csiph.com comp.lang.python:109059 On 23/05/2016 18:05, Ian Kelly wrote: > On Mon, May 23, 2016 at 10:39 AM, Robin Becker wrote: ......... > > If you want to show the float in a less noisy format, you can > explicitly format it using the 'g' or 'n' presentation type, which > essentially round to a given precision and strip off trailing zeros: > >>>> >>> '{:g}'.format(3*0.2) > '0.6' thanks; looking in 2.7 source I believe that the old float.__str__ behaved like '%.12g' formatting. I can't imagine why people thought this was a 'good' idea though. -- Robin Becker