Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.python > #75919
| Path | csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed4.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail |
|---|---|
| Return-Path | <rosuav@gmail.com> |
| X-Original-To | python-list@python.org |
| Delivered-To | python-list@mail.python.org |
| X-Spam-Status | OK 0.013 |
| X-Spam-Evidence | '*H*': 0.97; '*S*': 0.00; 'explicitly': 0.05; 'nicely': 0.07; 'subject:help': 0.08; 'assumed': 0.09; 'exception.': 0.09; 'cc:addr:python-list': 0.11; 'clause,': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'simplest': 0.16; 'terminate.': 0.16; 'unexpected': 0.16; 'exception': 0.16; 'sat,': 0.16; 'wrote:': 0.18; 'code,': 0.22; 'example': 0.22; 'aug': 0.22; 'cc:addr:python.org': 0.22; 'cc:2**0': 0.24; 'source': 0.25; 'header:In-Reply-To:1': 0.27; 'idea': 0.28; 'chris': 0.29; 'am,': 0.29; 'thus': 0.29; 'database,': 0.30; 'message-id:@mail.gmail.com': 0.30; 'program,': 0.31; 'that.': 0.31; 'subject:some': 0.31; 'terminate': 0.31; 'could': 0.34; 'connection': 0.35; 'received:google.com': 0.35; 'there': 0.35; 'should': 0.36; 'writes': 0.38; 'handle': 0.38; 'issue': 0.38; 'resource': 0.38; 'anything': 0.39; 'release': 0.40; 'entire': 0.61; 'simple': 0.61; 'back': 0.62; 'kind': 0.63; 'finally': 0.65; 'within': 0.65; 'close': 0.67; 'reads': 0.68; 'real-world': 0.68; '10:32': 0.84; 'to:none': 0.92 |
| 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:cc :content-type; bh=prdW9knkvNt+Xm8mlfO9piWBvu4KUOuu0Vk/CiDpX6k=; b=nDaRKD+X7nWbsB8PMn88EKYX5UBLZTz3cCoJ2T0eMHjC5H0tM6Co8OiYy1PaXT+2vL EGaGfMJg5dfNtrNWKN8NLEBnxi6j45JGcESn0HsWoeN+iwjA2/bD7Cwh2DoVFMpHG5QP AtWJJ3JG1CBLJTCQeEsnxNOMGNPyeBylVBw+1Bony3Ns3SzQ703prvlFaiVErcY6aMLn NSbUKkhkgaxRyqXLpHzBiWeorC2Xkcv7XTilUw4oaRDKImVGXwhX1sIHkayUGS+OGIZV 6/09YvMzaJJNQsc13NqNofdwCO42Z9OeAUccvu+L7MN4Mls7/uhMBOoXKJqqQpKulDmm tOtA== |
| MIME-Version | 1.0 |
| X-Received | by 10.42.96.132 with SMTP id j4mr16252578icn.16.1407544760571; Fri, 08 Aug 2014 17:39:20 -0700 (PDT) |
| In-Reply-To | <CALvWhxtqhz9TR2=MZJRXhzEYvGjungQmrQd44Jeqf5hu8oysDA@mail.gmail.com> |
| References | <CANhUTb9tEnT=uTMhdA+Fd2zJTMauo1BWkX2dgcE0dG_H5arx9Q@mail.gmail.com> <CALvWhxtWyQw08TBVOTDhfFjm0=PP19QY3Yv-v74Q2T=ndyW91g@mail.gmail.com> <CAPTjJmq=dydhFEooRHqG2UaHTREjJSyqk9McuDYhc8PRjSzTgA@mail.gmail.com> <CALvWhxvx0HUQmMKTw=XCYac7E8ZsivM_S=3E-FAHfUpJT-Ge3g@mail.gmail.com> <CAPTjJmr8-vKmyOmXf=bb20imEoZnqnQx4gATkw1tgFVeyyNrig@mail.gmail.com> <CALvWhxtqhz9TR2=MZJRXhzEYvGjungQmrQd44Jeqf5hu8oysDA@mail.gmail.com> |
| Date | Sat, 9 Aug 2014 10:39:20 +1000 |
| Subject | Re: Newbie needing some help |
| From | Chris Angelico <rosuav@gmail.com> |
| Cc | "python-list@python.org" <python-list@python.org> |
| Content-Type | text/plain; charset=UTF-8 |
| X-BeenThere | python-list@python.org |
| X-Mailman-Version | 2.1.15 |
| Precedence | list |
| List-Id | General discussion list for the Python programming language <python-list.python.org> |
| List-Unsubscribe | <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe> |
| List-Archive | <http://mail.python.org/pipermail/python-list/> |
| List-Post | <mailto:python-list@python.org> |
| List-Help | <mailto:python-list-request@python.org?subject=help> |
| List-Subscribe | <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.12774.1407544763.18130.python-list@python.org> (permalink) |
| Lines | 20 |
| NNTP-Posting-Host | 2001:888:2000:d::a6 |
| X-Trace | 1407544763 news.xs4all.nl 2920 [2001:888:2000:d::a6]:57272 |
| X-Complaints-To | abuse@xs4all.nl |
| Xref | csiph.com comp.lang.python:75919 |
Show key headers only | View raw
On Sat, Aug 9, 2014 at 10:32 AM, Chris Kaynor <ckaynor@zindagigames.com> wrote: > The main issue I can see with that idea is that the exception will keep a > reference to the database connection (as with all locals), so unless you > explicitly close it within a finally clause, the database connection could > still be left hanging, and thus no rollback will occur. To clarify: The simple example I used there was assumed to be the entire program, meaning that the process will terminate on exception. No worries about resource release then! This kind of model works nicely for anything that reads from one source and writes into the database, or processes data from the database back into the database, or anything like that. The general assumption is that an unexpected exception should be treated as fatal - just write to the console and terminate. While this might seem like the simplest 1% of cases, it's able to handle a lot of real-world situations. And since it takes no extra code, it's the perfect way to start :) ChrisA
Back to comp.lang.python | Previous | Next | Find similar | Unroll thread
Re: Newbie needing some help Chris Angelico <rosuav@gmail.com> - 2014-08-09 10:39 +1000
csiph-web