Re: Ternary operator associativity

Path	csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed2.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path	<torriem+gmail@torriefamily.org>
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; 'operator': 0.03; '(except': 0.07; 'bug.': 0.09; 'subject:skip:a 10': 0.09; 'tests,': 0.09; 'python': 0.11; 'assume': 0.14; 'comparisons,': 0.16; 'from:addr:torriem': 0.16; 'from:name:michael torrie': 0.16; 'left,': 0.16; 'precedence': 0.16; 'ternary': 0.16; 'language': 0.16; 'wrote:': 0.18; 'seems': 0.21; 'header:User-Agent:1': 0.23; 'compare': 0.26; 'right.': 0.26; 'header:In-Reply-To:1': 0.27; 'am,': 0.29; 'grouping': 0.31; 'operators': 0.31; 'languages': 0.32; 'message-id:@gmail.com': 0.38; 'to:addr:python-list': 0.38; 'skip:- 10': 0.38; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'according': 0.40; 'chain': 0.60; 'mentioned': 0.61; 'skip:n 10': 0.64; 'day': 0.76
X-Virus-Scanned	amavisd-new at torriefamily.org
Date	Thu, 06 Mar 2014 10:47:25 -0700
From	Michael Torrie <torriem@gmail.com>
User-Agent	Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20131118 Thunderbird/17.0.11
MIME-Version	1.0
To	python-list@python.org
Subject	Re: Ternary operator associativity
References	<f3bd8da6-dc2e-4b05-b50b-3a2c9d825367@googlegroups.com>
In-Reply-To	<f3bd8da6-dc2e-4b05-b50b-3a2c9d825367@googlegroups.com>
Content-Type	text/plain; charset=ISO-8859-1
Content-Transfer-Encoding	7bit
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.7869.1394128061.18130.python-list@python.org> (permalink)
Lines	15
NNTP-Posting-Host	2001:888:2000:d::a6
X-Trace	1394128062 news.xs4all.nl 2913 [2001:888:2000:d::a6]:54688
X-Complaints-To	abuse@xs4all.nl
Xref	csiph.com comp.lang.python:67945

Show key headers only | View raw

On 03/06/2014 04:34 AM, candide wrote:
> According to the official documentation, the ternary operator has left-to-right associativity :
> 
> -------------------
> Operators in the same box group left to right (except for comparisons, including tests, which all have the same precedence and chain from left to right -- see section Comparisons -- and exponentiation, which groups from right to left).
> -------------------
> 
> 
> Nevertheless, the ternary operator grouping seems to be from right to left, compare :

I was reading a blog about PHP the other day and it mentioned PHP was
the only language he knew of that had ternary operator precedence going
left to right.  All other languages use right to left.  So I assume that
Python also uses right to left and that the documentation is a bug.

Thread

Ternary operator associativity candide <c.candide@laposte.net> - 2014-03-06 03:34 -0800
  Re: Ternary operator associativity Michael Torrie <torriem@gmail.com> - 2014-03-06 10:47 -0700
  Re: Ternary operator associativity Terry Reedy <tjreedy@udel.edu> - 2014-03-06 13:52 -0500
  Re: Ternary operator associativity Tim Chase <python.list@tim.thechases.com> - 2014-03-06 12:59 -0600
  Re: Ternary operator associativity Terry Reedy <tjreedy@udel.edu> - 2014-03-06 15:15 -0500

csiph-web