Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From: Tim Chase <python.list@tim.thechases.com>
Newsgroups: comp.lang.python
Subject: Re: How to get a directory list sorted by date?
Date: Sun, 15 May 2016 13:12:32 -0500
Lines: 24
Message-ID: <mailman.0.1463338938.19823.python-list@python.org>
References: <vmpl0d-l9n.ln1@esprimo.zbmc.eu> <nh9gh6$ekb$1@ger.gmane.org> <20160515061511.7c62b0e1@bigbox.christie.dr> <nha1h2$r6s$1@ger.gmane.org> <20160515131232.200268cf@bigbox.christie.dr>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
X-Trace: news.uni-berlin.de vbkoZImuy4yYu6NIJQcQ3wjhMfA0aLq6d77zRpxpFgJQ==
Return-Path: <python.list@tim.thechases.com>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.003
X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'calls.': 0.07; 'feature.': 0.07; 'cc:addr:python-list': 0.09; 'subject:How': 0.09; 'filenames,': 0.09; 'highlighting': 0.09; 'inclusion': 0.09; 'typed': 0.09; '-tkc': 0.16; 'from:addr:python.list': 0.16; 'from:addr:tim.thechases.com': 0.16; 'from:name:tim chase': 0.16; 'hypothetical': 0.16; 'received:io': 0.16; 'received:psf.io': 0.16; 'sorted()': 0.16; 'wrote:': 0.16; 'memory': 0.17; 'cc:2**0': 0.20; 'cc:addr:python.org': 0.20; 'algorithm': 0.20; 'cc:no real name:2**0': 0.22; 'thanks,': 0.24; 'tim': 0.24; 'header:In-Reply- To:1': 0.24; 'subject:list': 0.26; 'sequence': 0.27; 'initial': 0.28; 'chase': 0.29; 'reduced': 0.29; 'subject:?': 0.36; 'subject:: ': 0.37; 'received:10': 0.37; 'agree': 0.37; 'charset :us-ascii': 0.37; 'entire': 0.61; 'provide': 0.61; 'details': 0.62; 'results': 0.66; 'reply': 0.68; 'subject:get': 0.81; 'one).': 0.84; 'peter,': 0.84; 'received:23': 0.84; 'edwards': 0.91
X-Sender-Id: wwwh|x-authuser|tim@thechases.com
X-Sender-Id: wwwh|x-authuser|tim@thechases.com
X-MC-Relay: Neutral
X-MailChannels-SenderId: wwwh|x-authuser|tim@thechases.com
X-MailChannels-Auth-Id: wwwh
X-MC-Loop-Signature: 1463335954234:230733810
X-MC-Ingress-Time: 1463335954234
In-Reply-To: <nha1h2$r6s$1@ger.gmane.org>
X-Mailer: Claws Mail 3.11.1 (GTK+ 2.24.25; x86_64-pc-linux-gnu)
X-AuthUser: tim@thechases.com
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
X-Mailman-Original-Message-ID: <20160515131232.200268cf@bigbox.christie.dr>
X-Mailman-Original-References: <vmpl0d-l9n.ln1@esprimo.zbmc.eu> <nh9gh6$ekb$1@ger.gmane.org> <20160515061511.7c62b0e1@bigbox.christie.dr> <nha1h2$r6s$1@ger.gmane.org>
Xref: csiph.com comp.lang.python:108643

On 2016-05-15 14:36, Grant Edwards wrote:
> On 2016-05-15, Tim Chase <python.list@tim.thechases.com> wrote:
> > unless sorted() returns a lazy sorter,
> 
> What's a lazy sorter?

A hypothetical algorithm that can spool out a sorted sequence without
holding the entire sequence in memory at the same time. 

Though I typed that initial reply a little quickly, as I hadn't known
at the time that scandir()'s results also provide stat() results with
reduced overhead (whereas listdir() just returns the filenames, so
you have to stat() each one).  Thanks, Peter, for highlighting this
feature.

So in light of my newfound knowledge, I humbly retract my snark and
agree that it's better to exploit scandir()'s inclusion of stat()
details without additional calls.

-tkc