Re: all() is slow?

Path	csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!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 0.001
X-Spam-Evidence	'H': 1.00; 'S': 0.00; 'plenty': 0.03; 'exec': 0.07; 'happily': 0.07; 'hettinger': 0.07; 'python': 0.08; 'executed': 0.09; 'imho.': 0.09; 'internals,': 0.09; 'read.': 0.10; 'am,': 0.12; 'library': 0.14; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'messy': 0.16; 'received:209.85.213.174': 0.16; 'received:mail- yx0-f174.google.com': 0.16; 'subject:() ': 0.16; 'worse.': 0.16; 'wrote:': 0.18; 'exists': 0.18; 'raymond': 0.21; 'knowing': 0.23; 'header:In-Reply-To:1': 0.23; 'code': 0.25; "i'm": 0.26; 'message- id:@mail.gmail.com': 0.29; 'clean,': 0.30; 'humans': 0.30; 'subject:?': 0.31; 'nov': 0.31; 'thu,': 0.32; 'to:addr:python- list': 0.32; 'actually': 0.33; 'it.': 0.33; 'someone': 0.33; 'read,': 0.33; 'programmers': 0.35; 'uses': 0.36; 'received:google.com': 0.38; 'some': 0.38; 'received:209.85': 0.38; "i'd": 0.39; "it's": 0.39; 'subject:: ': 0.39; 'to:addr:python.org': 0.39; 'far': 0.40; 'received:209': 0.40; 'more': 0.60; '2011': 0.62; 'alternative': 0.63; 'computers': 0.64; 'believe': 0.64; 'code;': 0.84; 'suspicious': 0.91
DKIM-Signature	v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=R9MOkHs5yVNi3mHriofzlaKC502X8YXre0V298kikpo=; b=x0a7SS0fCFMmtpteek0iBrAd/oB6M/E810uKfGvqnuxWwRloMBB9c6TRWFlve3l+Wc L0fVMfEzlxLDP8cWjzernpgrD9L3qGGOUI2ALjqvULYO8wOuIGWN+ubC9FsEv3c0aobR v+PaRuMUmT8GjwMyInzVQ0lfh1Al9jb4yV+8c=
MIME-Version	1.0
In-Reply-To	<CABicbJKVAS+oJs7p2W+kyYQdSbaB4Hc1GZvy7qEeQKOeC7+kyQ@mail.gmail.com>
References	<Xns9F9684761E3AOKB@88.198.244.100> <436fb6a3-1075-45a6-8f93-5612d050b11a@q35g2000prh.googlegroups.com> <CAPTjJmqESQc2HrMNSKLbnG5C8fvrOQvaPme0vTN9VS9eQkndFg@mail.gmail.com> <mailman.2558.1320799508.27778.python-list@python.org> <4eb9e9c2$0$29988$c3e8da3$5496439d@news.astraweb.com> <CABicbJKVAS+oJs7p2W+kyYQdSbaB4Hc1GZvy7qEeQKOeC7+kyQ@mail.gmail.com>
Date	Thu, 10 Nov 2011 10:15:07 +1100
Subject	Re: all() is slow?
From	Chris Angelico <rosuav@gmail.com>
To	python-list@python.org
Content-Type	text/plain; charset=ISO-8859-1
X-BeenThere	python-list@python.org
X-Mailman-Version	2.1.12
Precedence	list
List-Id	General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe	<http://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	<http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups	comp.lang.python
Message-ID	<mailman.2578.1320880510.27778.python-list@python.org> (permalink)
Lines	19
NNTP-Posting-Host	2001:888:2000:d::a6
X-Trace	1320880510 news.xs4all.nl 6847 [2001:888:2000:d::a6]:33245
X-Complaints-To	abuse@xs4all.nl
Xref	x330-a1.tempe.blueboxinc.net comp.lang.python:15518

Show key headers only | View raw

On Thu, Nov 10, 2011 at 10:01 AM, Devin Jeanpierre
<jeanpierreda@gmail.com> wrote:
>> If it were someone other than Raymond Hettinger responsible for the use
>> of exec in namedtuple, I'd be a lot more suspicious of it.
>
> I'm not going to be less suspicious based on a name. It reads like
> insanity, and the justification was terrible.

It's said that code exists foremost for humans to read, and only
incidentally for computers to execute. I believe that this is inverted
for library code; as long as the _interface_ is clean, you can get
away with some messy internals, because it's going to be executed far
more often than actually read. Python programmers can use namedtuples
happily without knowing that the implementation uses exec.

The justification is, if I understand correctly, that the alternative
is worse. That's plenty of justification imho.

ChrisA

Thread

all() is slow? "OKB (not okblacke)" <brenNOSPAMbarn@NObrenSPAMbarn.net> - 2011-11-07 21:00 +0000
  Re: all() is slow? Chris Rebert <clp2@rebertia.com> - 2011-11-07 13:39 -0800
  Re: all() is slow? david vierra <codewarrior0@gmail.com> - 2011-11-07 13:46 -0800
    Re: all() is slow? Chris Angelico <rosuav@gmail.com> - 2011-11-08 09:06 +1100
      Re: all() is slow? Henrik Faber <hfaber@invalid.net> - 2011-11-08 13:09 +0100
        Re: all() is slow? Chris Angelico <rosuav@gmail.com> - 2011-11-08 23:14 +1100
        Re: all() is slow? John Posner <jjposner@optimum.net> - 2011-11-08 17:51 -0500
        Re: all() is slow? Tim Chase <python.list@tim.thechases.com> - 2011-11-08 17:56 -0600
    Re: all() is slow? Devin Jeanpierre <jeanpierreda@gmail.com> - 2011-11-08 19:44 -0500
      Re: all() is slow? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-09 02:47 +0000
        Re: all() is slow? Devin Jeanpierre <jeanpierreda@gmail.com> - 2011-11-09 18:01 -0500
          Re: all() is slow? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-09 23:11 +0000
            Re: all() is slow? Devin Jeanpierre <jeanpierreda@gmail.com> - 2011-11-09 20:26 -0500
              Re: all() is slow? alex23 <wuwei23@gmail.com> - 2011-11-09 19:50 -0800
                Re: all() is slow? Devin Jeanpierre <jeanpierreda@gmail.com> - 2011-11-09 23:40 -0500
                Re: all() is slow? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-10 07:35 +0000
              Re: all() is slow? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-10 07:48 +0000
                Re: all() is slow? Devin Jeanpierre <jeanpierreda@gmail.com> - 2011-11-10 03:51 -0500
                Re: all() is slow? gene heskett <gheskett@wdtv.com> - 2011-11-10 08:20 -0500
                Re: all() is slow? Terry Reedy <tjreedy@udel.edu> - 2011-11-10 14:25 -0500
            Re: all() is slow? Devin Jeanpierre <jeanpierreda@gmail.com> - 2011-11-09 20:35 -0500
            Re: all() is slow? Ian Kelly <ian.g.kelly@gmail.com> - 2011-11-09 19:10 -0700
            Re: all() is slow? Ethan Furman <ethan@stoneleaf.us> - 2011-11-10 10:43 -0800
            Re: all() is slow? Devin Jeanpierre <jeanpierreda@gmail.com> - 2011-11-10 15:37 -0500
              Re: all() is slow? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-10 23:07 +0000
                Re: all() is slow? Devin Jeanpierre <jeanpierreda@gmail.com> - 2011-11-10 23:35 -0500
                Re: all() is slow? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-12 01:18 +0000
                Re: all() is slow? Devin Jeanpierre <jeanpierreda@gmail.com> - 2011-11-13 01:28 -0500
                Re: all() is slow? alex23 <wuwei23@gmail.com> - 2011-11-13 18:50 -0800
                Re: all() is slow? Devin Jeanpierre <jeanpierreda@gmail.com> - 2011-11-13 23:48 -0500
              Re: all() is slow? "OKB (not okblacke)" <brenNOSPAMbarn@NObrenSPAMbarn.net> - 2011-11-11 05:40 +0000
            Re: all() is slow? Ian Kelly <ian.g.kelly@gmail.com> - 2011-11-10 14:19 -0700
              Re: all() is slow? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-10 22:56 +0000
            Re: all() is slow? Ethan Furman <ethan@stoneleaf.us> - 2011-11-10 13:47 -0800
        Re: all() is slow? Chris Angelico <rosuav@gmail.com> - 2011-11-10 10:15 +1100
    Re: all() is slow? Chris Angelico <rosuav@gmail.com> - 2011-11-09 12:19 +1100
    Re: all() is slow? Chris Rebert <clp2@rebertia.com> - 2011-11-08 17:30 -0800
      Re: all() is slow? Hans Mulder <hansmu@xs4all.nl> - 2011-11-09 16:41 +0100
        Re: all() is slow? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2011-11-09 09:07 -0800
  Re: all() is slow? John Nagle <nagle@animats.com> - 2011-11-09 14:16 -0800
    Re: all() is slow? alex23 <wuwei23@gmail.com> - 2011-11-09 19:52 -0800
    Re: all() is slow? "OKB (not okblacke)" <brenNOSPAMbarn@NObrenSPAMbarn.net> - 2011-11-10 19:35 +0000
  Re: all() is slow? BOOK-AZ <amalguseynov@gmail.com> - 2011-11-15 08:02 -0800

csiph-web