Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!feeds.phibee-telecom.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: <python-python-list@m.gmane.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; 'from:addr:yahoo.co.uk': 0.04; 'tree': 0.05; 'pypi': 0.07; 'dan': 0.09; 'lawrence': 0.09; 'library?': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'trees': 0.09; 'python': 0.11; 'jan': 0.12; 'language.': 0.14; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'tempted': 0.16; 'language': 0.16; 'wrote:': 0.18; 'implementing': 0.19; 'header:User-Agent:1': 0.23; "aren't": 0.24; 'mon,': 0.24; 'sort': 0.25; "i've": 0.25; 'header:X-Complaints-To:1': 0.27; 'header:In-Reply-To:1': 0.27; 'probably': 0.32; 'at:': 0.34; 'maybe': 0.34; 'common': 0.35; 'but': 0.35; 'there': 0.35; 'url:org': 0.36; 'problems': 0.38; 'to:addr:python-list': 0.38; 'pm,': 0.38; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'most': 0.60; "you're": 0.61; 'times': 0.62; "you've": 0.63; 'kind': 0.63; 'our': 0.64; 'specialized': 0.65; 'charset:windows-1252': 0.65; 'interest.': 0.81; '2015': 0.84; 'url:ru': 0.98
X-Injected-Via-Gmane: http://gmane.org/
To: python-list@python.org
From: Mark Lawrence <breamoreboy@yahoo.co.uk>
Subject: Re: Trees
Date: Tue, 20 Jan 2015 02:46:01 +0000
References: <CAG=hEY1L-39EmuWpdEh_n-BNfs=qG9nL=MrMT0ar72yGBrkoUA@mail.gmail.com> <CAGGBd_pMdYZwt-ksdSpDFNVxXwkekGsJFi=2C66PStTFzS0R+w@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
X-Gmane-NNTP-Posting-Host: host-92-24-222-48.ppp.as43234.net
User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0
In-Reply-To: <CAGGBd_pMdYZwt-ksdSpDFNVxXwkekGsJFi=2C66PStTFzS0R+w@mail.gmail.com>
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.17879.1421721974.18130.python-list@python.org>
Lines: 29
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1421721974 news.xs4all.nl 2847 [2001:888:2000:d::a6]:45604
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:84052

On 20/01/2015 00:49, Dan Stromberg wrote:
> On Mon, Jan 19, 2015 at 2:06 PM, Zachary Gilmartin
> <zacharygilmartin@gmail.com> wrote:
>> Why aren't there trees in the python standard library?
>
> Trees are kind of specialized datastructures; no one type of tree
> solves all tree-related problems suitably well.
>
> I think probably the most common need for a tree is implementing a
> cache, but most times you're tempted to sort inside a loop you're
> better off with a tree.
>
> I've put some time into python trees; most of them are on pypi and at:
> http://stromberg.dnsalias.org/~dstromberg/datastructures/
> and:
> http://stromberg.dnsalias.org/~strombrg/python-tree-and-heap-comparison/
>
> HTH
>

I don't know if you've seen this http://kmike.ru/python-data-structures/ 
but maybe of interest.

-- 
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence