Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #76082

Re: Is print thread safe?

Path csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!xlned.com!feeder1.xlned.com!newsfeed.xs4all.nl!newsfeed3a.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path <cameron@cskk.homeip.net>
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; 'broken': 0.04; 'expected.': 0.09; 'python': 0.11; 'thread': 0.14; 'andy': 0.16; 'from:addr:cs': 0.16; 'from:addr:zip.com.au': 0.16; 'from:name:cameron simpson': 0.16; 'message-id:@cskk.homeip.net': 0.16; 'received:211.29': 0.16; 'received:211.29.132': 0.16; 'received:cskk.homeip.net': 0.16; 'received:homeip.net': 0.16; 'received:optusnet.com.au': 0.16; 'received:syd.optusnet.com.au': 0.16; 'simpson': 0.16; 'wrote:': 0.18; 'print': 0.22; 'header :User-Agent:1': 0.23; 'basis,': 0.24; 'certainly': 0.24; 'documented': 0.24; 'cheers,': 0.24; "i've": 0.25; 'logging': 0.26; 'mention': 0.26; 'header:In-Reply-To:1': 0.27; "d'aprano": 0.31; 'steven': 0.31; 'another': 0.32; 'but': 0.35; 'there': 0.35; 'described': 0.36; 'object,': 0.36; 'received:com.au': 0.36; 'charset:us-ascii': 0.36; 'subject:?': 0.36; 'received:211': 0.38; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'content- disposition:inline': 0.62; 'safe.': 0.84; 'system!': 0.84
Date Tue, 12 Aug 2014 07:53:11 +1000
From Cameron Simpson <cs@zip.com.au>
To python-list@python.org
Subject Re: Is print thread safe?
MIME-Version 1.0
Content-Type text/plain; charset=us-ascii; format=flowed
Content-Disposition inline
In-Reply-To <53e8ea27$0$29981$c3e8da3$5496439d@news.astraweb.com>
User-Agent Mutt/1.5.21 (2010-09-15)
References <53e8ea27$0$29981$c3e8da3$5496439d@news.astraweb.com>
X-Optus-CM-Score 0
X-Optus-CM-Analysis v=2.1 cv=BdjhjNd2 c=1 sm=1 tr=0 a=YuQlxtEQCowy2cfE5kc7TA==:117 a=YuQlxtEQCowy2cfE5kc7TA==:17 a=ZtCCktOnAAAA:8 a=PO7r1zJSAAAA:8 a=LcaDllckn3IA:10 a=PzczSypyshMA:10 a=gyjTKktfeJ0A:10 a=kj9zAlcOel0A:10 a=vrnE16BAAAAA:8 a=kZ7UWmmPAAAA:8 a=8nmYFzhLAAAA:8 a=HT8Xwple0xI3hFoARK4A:9 a=CjuIK1q_8ugA:10 a=pyH5b1fOeEsA:10 a=dVHdXv-K6tQA:10
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.12868.1407795799.18130.python-list@python.org> (permalink)
Lines 22
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1407795799 news.xs4all.nl 2866 [2001:888:2000:d::a6]:58171
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:76082

Show key headers only | View raw

On 12Aug2014 02:07, Steven D'Aprano <steve+comp.lang.python@pearwood.info> wrote:
>INADA Naoki wrote:
>
>> On Python 3, print is thread safe.
>> But Python 2 has broken scenario:
>
>Is this documented somewhere?

In python/2.7.6/reference/simple_stmts.html#index-22, "print" is described in 
terms of a "write" for each object, and a "write" for the separators. There is 
no mention of locking.

On that basis, I would find the interleaving described normal and expected. And 
certainly not "broken".

Just use a lock! And rebind "print"! Or use the logging system!

Cheers,
Cameron Simpson <cs@zip.com.au>

Wow!  Yet another place that I've been quoted...
         - Andy Beals <bandy@cinnamon.com>

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Is print thread safe? Steven D'Aprano <steve@pearwood.info> - 2014-08-11 07:44 +0000
  Re: Is print thread safe? INADA Naoki <songofacandy@gmail.com> - 2014-08-11 19:19 +0900
    Re: Is print thread safe? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-08-12 02:07 +1000
      Re: Is print thread safe? Cameron Simpson <cs@zip.com.au> - 2014-08-12 07:53 +1000
        Re: Is print thread safe? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-08-12 09:56 +1000
          Re: Is print thread safe? Chris Angelico <rosuav@gmail.com> - 2014-08-12 10:14 +1000
          Re: Is print thread safe? Marko Rauhamaa <marko@pacujo.net> - 2014-08-12 08:01 +0300
            Re: Is print thread safe? Cameron Simpson <cs@zip.com.au> - 2014-08-12 16:15 +1000
          Re: Is print thread safe? Cameron Simpson <cs@zip.com.au> - 2014-08-12 14:31 +1000
          Re: Is print thread safe? Chris Angelico <rosuav@gmail.com> - 2014-08-12 23:53 +1000

csiph-web