Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.albasani.net!news.stack.nl!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 0.072 X-Spam-Evidence: '*H*': 0.86; '*S*': 0.00; 'output': 0.05; 'pep': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; '36,': 0.16; '46,': 0.16; 'finney': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'examples': 0.20; '>>>': 0.22; 'code,': 0.22; 'import': 0.22; 'aug': 0.22; 'header:User-Agent:1': 0.23; 'subject:problem': 0.24; 'header:X-Complaints-To:1': 0.27; 'door': 0.30; 'easier': 0.31; 'that.': 0.31; 'writes:': 0.31; 'open': 0.33; 'skip:d 20': 0.34; 'problem': 0.35; 'equal': 0.35; 'but': 0.35; 'ben': 0.38; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'read': 0.60; 'break': 0.61; 'skip:t 30': 0.61; 'subject: ': 0.61; 'information,': 0.61; "you've": 0.63; 'different': 0.65; 'answer.': 0.68; 'limit': 0.70; 'helping': 0.70; '\xe2\x80\x93': 0.77; 'case?': 0.84; 'different.': 0.84; 'received:125': 0.84; 'why?': 0.91; '\xe2\x80\x9cthe': 0.91 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Ben Finney Subject: Re: timedelta problem Date: Fri, 15 Aug 2014 13:34:06 +1000 References: <53ED6F6F.2030004@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Gmane-NNTP-Posting-Host: jigong.madmonks.org X-Public-Key-ID: 0xAC128405 X-Public-Key-Fingerprint: 517C F14B B2F3 98B0 CB35 4855 B8B2 4C06 AC12 8405 X-Public-Key-URL: http://www.benfinney.id.au/contact/bfinney-pubkey.asc X-Post-From: Ben Finney User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) Cancel-Lock: sha1:L4ePxzdby20SpzbJ12DZ9mQKvPg= 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: 40 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1408073706 news.xs4all.nl 2953 [2001:888:2000:d::a6]:58212 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:76347 luofeiyu writes: > import datetime > t1='Sat, 09 Aug 2014 07:36:46 -0700' > t2='Sat, 09 Aug 2014 07:36:46 +0700' > >>> datetime.datetime.strptime(t1,"%a, %d %b %Y %H:%M:%S %z") > datetime.datetime(2014, 8, 9, 7, 36, 46, > tzinfo=datetime.timezone(datetime.timed > elta(-1, 61200))) > >>> datetime.datetime.strptime(t2,"%a, %d %b %Y %H:%M:%S %z") > datetime.datetime(2014, 8, 9, 7, 36, 46, > tzinfo=datetime.timezone(datetime.timed > elta(0, 25200))) (Your examples will be easier to read – and you will help those who are helping you – if you conform to PEP 8 in the code, and don't break up the output when you copy it here.) > problem : > > t1 is GMT time 2014 00:36:46 > t2 is GMT time 2014 14:36:46 Not true; t1 and t2 are not in the “GMT” zone, they are in UTC-0700 and UTC+0700 respectively. Their value includes that. The instants they *represent* may be equal to the times-plus-timezone you've listed here, but their value is different. The value includes the timezone information, so they're different from what you show. > datetime.datetime.strptime do not give me the right answer. What do you think the right answer would be in each case? Why? -- \ “The aim of science is not to open the door to infinite wisdom, | `\ but to set some limit on infinite error.” —Bertolt Brecht, | _o__) _Leben des Galilei_, 1938 | Ben Finney