Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > comp.lang.python > #68302

Re: What does gc.get_objects() return?

Path csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.mixmin.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed4a.news.xs4all.nl!xs4all!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 0.052
X-Spam-Evidence '*H*': 0.90; '*S*': 0.00; 'cpython': 0.05; 'integers': 0.09; 'at)': 0.16; 'tuple': 0.16; 'wrote:': 0.18; 'wed,': 0.18; '>>>': 0.22; '(in': 0.22; 'possibly': 0.26; 'references': 0.26; 'header:In-Reply-To:1': 0.27; 'chris': 0.29; 'message-id:@mail.gmail.com': 0.30; '>>>>': 0.31; 'with,': 0.31; 'could': 0.34; "can't": 0.35; 'something': 0.35; 'done.': 0.35; 'objects': 0.35; 'but': 0.35; 'received:google.com': 0.35; 'false': 0.36; 'done': 0.36; 'subject:?': 0.36; 'to:addr:python- list': 0.38; 'pm,': 0.38; 'anything': 0.39; '12,': 0.39; 'itself': 0.39; 'to:addr:python.org': 0.39; 'worth': 0.66; 'mar': 0.68; 'subject:skip:g 10': 0.84
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=EBkcXKhBbqH8vkaE7XYYMyVypw0UyhOSxUTTnKao/gE=; b=GomUt1lgWmsiyS6w1tIXinUaawC62wynqsLeFcEswjq44ZB+xzZb0L28YwVCSlAgJQ TzgWCGZm+ypXWmafURWe/nmEy23iYF6EVsOI8lxjoUBoc/zpRjhwCNs+1iw9WsH1UeWK W7ai8X9YIh4KBDjISnLPOUV7fyC28ghtQgsFRaoN5r8sW6qChBFI10LqUwMufSTANt4t PVEO5fltReOAwLYkU4cjosdXZmyfZOmxbnCqbg0xjzCEERliU0CCCPEFlOZVsdN8RaOx aQEWyXAtDlckt1z8DKBZ+9+VAT2pjZnHNbp1Hr6MtCVx6aqCHrGJNHinmy8aq86jDkFL nOHw==
X-Received by 10.68.134.198 with SMTP id pm6mr43922pbb.9.1394663753707; Wed, 12 Mar 2014 15:35:53 -0700 (PDT)
MIME-Version 1.0
In-Reply-To <CAPTjJmqdKZ6qDQ+PZAdxVF-hKN=txKh35ga_C451C2z_hpZZAA@mail.gmail.com>
References <lfqcr8$249$1@ger.gmane.org> <5320BD3F.5030509@mrabarnett.plus.com> <lfqjgu$kug$1@ger.gmane.org> <CAPTjJmqdKZ6qDQ+PZAdxVF-hKN=txKh35ga_C451C2z_hpZZAA@mail.gmail.com>
From Ian Kelly <ian.g.kelly@gmail.com>
Date Wed, 12 Mar 2014 16:35:13 -0600
Subject Re: What does gc.get_objects() return?
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.8107.1394663762.18130.python-list@python.org> (permalink)
Lines 23
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1394663762 news.xs4all.nl 2870 [2001:888:2000:d::a6]:34743
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:68302

Show key headers only | View raw


On Wed, Mar 12, 2014 at 3:44 PM, Chris Angelico <rosuav@gmail.com> wrote:
> The concept is that the GC tracks (in that sense; everything in
> CPython is refcounted, but that's not what these functions look at)
> anything that could be a part of a reference cycle. That's all it
> concerns itself with, so something that can't have references to
> arbitrary objects can't possibly be worth tracking. Interestingly, a
> tuple of integers is tracked:
>
>>>> a=1,2,3
>>>> gc.is_tracked(a)
> True
>
> So not all optimizations are done that could be done.

Or is it?

>>> a = 1,2,3
>>> gc.is_tracked(a)
True
>>> gc.collect()
0
>>> gc.is_tracked(a)
False

Back to comp.lang.python | Previous | Next | Find similar | Unroll thread


Thread

Re: What does gc.get_objects() return? Ian Kelly <ian.g.kelly@gmail.com> - 2014-03-12 16:35 -0600

csiph-web