Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.011 X-Spam-Evidence: '*H*': 0.98; '*S*': 0.00; 'explicitly': 0.04; 'python': 0.09; 'before.': 0.09; 'similar,': 0.09; 'cc:addr :python-list': 0.10; 'assume': 0.11; 'nick': 0.16; 'wrote:': 0.17; 'url:moin': 0.17; 'saying': 0.18; 'appears': 0.18; 'cc:2**0': 0.23; 'cc:addr:python.org': 0.25; 'header:In-Reply-To:1': 0.25; 'header:User-Agent:1': 0.26; 'url:wiki': 0.26; 'am,': 0.27; 'implemented': 0.27; 'arrays': 0.29; 'link,': 0.29; 'lists': 0.31; 'url:python': 0.32; 'received:google.com': 0.34; 'thanks': 0.34; 'list': 0.35; 'built-in': 0.35; 'lists.': 0.35; 'received:209.85.220': 0.35; 'received:209.85': 0.35; 'message- id:@gmail.com': 0.36; 'url:org': 0.36; 'anything': 0.36; 'received:209': 0.37; 'subject:: ': 0.38; 'instead': 0.39; 'header:Received:5': 0.40; 'worth': 0.63; 'subject:. ': 0.66; 'believe': 0.69; 'complexity': 0.84 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=Q5VBNCPPyiYriixD7POAUN/xq5F3enVz6VKRSA+LvTw=; b=GBGX1X4YXsmO7QVlsRutvg5IhW6k2TVS/f3f+bIQq2HLk1QzGiHOM8DJgr7ElZ3BOE yXc+Z1iwiTrGd4IHFThfAC9dOYcRT3DD68oQxJ2VPWPPXZnu9nN1GXilj957OSua7QR3 2JjpRN9AhDeZW5i6zgCaQopwioial+PL2HGQDoDLPHVKleiSIvGcukid9ROW3iyR40vp I2ujQA7bB6M74cQSZ2CkGE6L5PKwvb+/brf6sf7Lz4wjI+IBY4ymGnh07vkKt9i34ZUy J1cwVB1nxUNNBUQIU+IgABbcy/gUX1+voNNMzTcCWq8BFnOn3czhOo4HszDasAGr92l0 5NEw== Date: Thu, 18 Oct 2012 11:38:20 -0700 From: Demian Brecht User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/20121010 Thunderbird/16.0.1 MIME-Version: 1.0 To: Nick Cash Subject: Re: len() on mutables vs. immutables References: <50803B2C.6010900@gmail.com> <846C3A8E860C4344B567D813B63AA51D5A9C82FE@BL2PRD0610MB349.namprd06.prod.outlook.com> In-Reply-To: <846C3A8E860C4344B567D813B63AA51D5A9C82FE@BL2PRD0610MB349.namprd06.prod.outlook.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: "python-list@python.org" X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 12 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1350585509 news.xs4all.nl 6891 [2001:888:2000:d::a6]:49827 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:31672 On 10/18/2012 11:28 AM, Nick Cash wrote: > It appears that list has len() complexity of O(1) > source: http://wiki.python.org/moin/TimeComplexity > It may be worth mentioning that lists in Python are implemented using arrays instead of linked lists. > > It's reasonable to assume that other built-in collection types would be similar, though I don't see anything explicitly saying so for bytearray. > > -Nick Cash Thanks for the link, I don't believe I had seen that one before.