Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!xlned.com!feeder3.xlned.com!news.astraweb.com!border2.a.newsrouter.astraweb.com!news.tele.dk!news.tele.dk!small.news.tele.dk!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path: <ian.g.kelly@gmail.com>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.120
X-Spam-Level: *
X-Spam-Evidence: '*H*': 0.77; '*S*': 0.01; 'extracted': 0.09; 'mostly': 0.14; 'heapq': 0.16; 'loop.': 0.16; 'simpson': 0.16; 'elements': 0.16; 'wrote:': 0.18; 'do.': 0.18; 'bit': 0.19; "haven't": 0.24; 'header:In-Reply-To:1': 0.27; 'appear': 0.29; 'dec': 0.30; 'message-id:@mail.gmail.com': 0.30; "i'm": 0.30; "i'd": 0.34; "can't": 0.35; 'but': 0.35; 'received:google.com': 0.35; 'thanks': 0.36; 'too': 0.37; 'to:addr:python-list': 0.38; 'pm,': 0.38; 'does': 0.39; 'to:addr:python.org': 0.39; 'how': 0.40; 'mentioned': 0.61; 'subject:more': 0.64; 'more': 0.64; 'believe': 0.68; 'nobody': 0.68; 'subject:there': 0.68; 'imagine': 0.93; '2013': 0.98
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; bh=liHeElBZTCXvn7Pb1WLB8yY9iribaVH9iNLzLsJmu1I=; b=mfIZTzdwZmoay37VTSK0VnsPjiL2mZEHbt7FIhCJTCQsJUEQuf3cqv8+Abg8mNlOS9 quNqdZWsgxZAHcS8U+eNoKEpwx3D7YBgpaaQuJN0xdpj55O6Myl4lOCfVkODdKZjEcG9 acLuJ/pu0rpjTt5hE34htTjN9biKkcktw4OIcqxjGxmhdgxfjwcAJ7Xrfs1pcEMDUgXR HNP/McQiQYBjHynfB9KRbdzZ+zKGyXfwr7dArJdILA7+xeMF+jWA0Wquf3rlWt63fg3G GciiGZpGUILnaznuyH3TSzZ6jMS1k1XQ8P5tZVahTIy06Gi+10s4swtZq5TtL5el4D3E q62Q==
X-Received: by 10.68.130.234 with SMTP id oh10mr41694030pbb.0.1386107030548; Tue, 03 Dec 2013 13:43:50 -0800 (PST)
MIME-Version: 1.0
In-Reply-To: <20131203211303.GA83257@cskk.homeip.net>
References: <bg60hjF83eoU1@mid.dfncis.de> <20131203211303.GA83257@cskk.homeip.net>
From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Tue, 3 Dec 2013 14:43:10 -0700
Subject: Re: extracting a heapq in a for loop - there must be more elegant solution
To: Python <python-list@python.org>
Content-Type: text/plain; charset=ISO-8859-1
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.3532.1386107033.18130.python-list@python.org>
Lines: 12
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1386107033 news.xs4all.nl 2876 [2001:888:2000:d::a6]:38777
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:60965

On Tue, Dec 3, 2013 at 2:13 PM, Cameron Simpson <cs@zip.com.au> wrote:
> On 03Dec2013 12:18, Helmut Jarausch <jarausch@igpm.rwth-aachen.de> wrote:
>> I'd like to extracted elements from a heapq in a for loop.
>> I feel my solution below is much too complicated.
>> How to do it more elegantly?
>
> I can't believe nobody has mentioned PriorityQueue.

As far as I'm aware, the only advantage of PriorityQueue over heapq is
that the former is thread-safe, which does not appear to be relevant
here.  I haven't tested it for speed, but I imagine it would be a fair
bit slower, mostly thanks to the locking it needs to do.