Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.mixmin.net!news.unit0.net!fu-berlin.de!uni-berlin.de!not-for-mail From: jmp Newsgroups: comp.lang.python Subject: Re: Namespaces are one honking great idea Date: Mon, 04 Jul 2016 13:23:17 +0200 Lines: 23 Message-ID: References: <57767a97$0$1606$c3e8da3$5496439d@news.astraweb.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Trace: news.uni-berlin.de 2NlZov3jnGB9jVH+pvJPkQohHyl2QuHCqaVHypStH2Dg== Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.006 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'attributes': 0.07; 'instantiated': 0.09; 'namespace': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'python': 0.10; 'packages.': 0.15; 'argument.': 0.16; 'entities.': 0.16; 'namespace.': 0.16; 'received:80.91.229.3': 0.16; 'received:io': 0.16; 'received:plane.gmane.org': 0.16; 'received:psf.io': 0.16; 'subject:Namespaces': 0.16; 'wrote:': 0.16; 'header:In-Reply- To:1': 0.24; 'header:User-Agent:1': 0.26; 'header:X-Complaints- To:1': 0.26; 'helpful': 0.27; 'used,': 0.27; 'behaviour': 0.29; 'grouping': 0.29; 'classes': 0.30; 'probably': 0.31; 'related': 0.32; 'class': 0.33; 'usually': 0.33; "d'aprano": 0.33; 'instances': 0.33; 'steven': 0.33; 'but': 0.36; 'should': 0.36; '(and': 0.36; 'modules': 0.36; 'to:addr:python-list': 0.36; 'pm,': 0.36; 'subject:: ': 0.37; 'really': 0.37; 'received:org': 0.37; 'seem': 0.37; 'why': 0.39; 'rather': 0.39; 'to:addr:python.org': 0.40; 'provide': 0.61; 'received:194': 0.61; 'charset:windows-1252': 0.62; 'more': 0.63; 'different': 0.63; 'construct': 0.84; 'others:': 0.84; 'using.': 0.84 X-Injected-Via-Gmane: http://gmane.org/ X-Gmane-NNTP-Posting-Host: paris.sequans.com User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 In-Reply-To: <57767a97$0$1606$c3e8da3$5496439d@news.astraweb.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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Mailman-Original-Message-ID: X-Mailman-Original-References: <57767a97$0$1606$c3e8da3$5496439d@news.astraweb.com> Xref: csiph.com comp.lang.python:111088 On 07/01/2016 04:13 PM, Steven D'Aprano wrote: > But classes are not like the others: they must be instantiated before they > can be used, and they are more than just a mere namespace grouping related > entities. Classes support inheritance. Classes should be used for "is-a" > relationships, not "has-a" relationships. Although classes (and instances) > are namespaces, they provide fundamentally different kind of behaviour than > modules and packages. A namespace would not hurt but I really don't get why you don't consider classes a valid and rather helpful namespace. 1/ classes do not have to be instantiated. 2/ the fact that classes are more than a namespace is not an argument. Almost any object in python is able to do more than what you are actually using. 3/ Classes are used as much as 'is-a' than 'has-a', class instances *have* a state usually described by attributes 4/ "Although classes (and instances) are namespaces, ". You seem to contradict yourself. It was probably a rhetorical construct but it's rather confusing. jm