Path: csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!weretis.net!feeder4.news.weretis.net!feeder.news-service.com!news2.euro.net!newsgate.cistron.nl!newsgate.news.xs4all.nl!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 0.004 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'received:localnet': 0.07; 'subject:two': 0.07; 'case)': 0.09; 'subject:parameters': 0.09; 'wrote:': 0.14; 'disallow': 0.16; 'from:addr:rohdewald.de': 0.16; 'from:addr:wolfgang': 0.16; 'from:name:wolfgang rohdewald': 0.16; 'message-id:@rohdewald.de': 0.16; 'received:91.62': 0.16; 'reply- to:addr:rohdewald.de': 0.16; 'reply-to:addr:wolfgang': 0.16; 'subject:function': 0.16; 'wolfgang': 0.16; 'cc:addr:python-list': 0.17; 'language': 0.18; 'call.': 0.19; 'header:In-Reply-To:1': 0.21; 'cc:2**0': 0.22; 'oriented': 0.23; 'parameters.': 0.23; 'objects': 0.23; 'code': 0.24; 'function': 0.25; 'parameters': 0.26; 'object': 0.26; 'cc:addr:python.org': 0.30; 'calling': 0.31; 'list': 0.33; 'header:User-Agent:1': 0.35; 'function.': 0.35; 'charset:us-ascii': 0.36; 'change': 0.37; 'subject:: ': 0.38; 'subject: (': 0.39; 'called': 0.39; 'your': 0.60; 'header:Message- Id:1': 0.62; 'matter': 0.63; 'back': 0.63; 'free': 0.63; 'header :Reply-To:1': 0.72; 'reply-to:no real name:2**0': 0.72; 'partially': 0.84 DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; t=1306831061; l=522; s=domk; d=rohdewald.de; h=Content-Transfer-Encoding:Content-Type:MIME-Version:In-Reply-To: References:Cc:Date:Subject:To:Reply-To:From:X-RZG-CLASS-ID:X-RZG-AUTH; bh=WjAwRtQGUJhipOMypKOw4HeqTHA=; b=Fzeqmh7FjVOihrPSMAOguUVfSPsrCy8nfkfaF8yP9azzTrx1ZnUZQVWMIAAbuSNDyXM KGFDr8vzA4xDlALIoaTHdMzqetus1USCdnzQjxXCLK1/HO79ncXvUI0ypoSEwg4qKAdHc XvQKwmPJI0BGvpjmnPzPRHFEkj3zeu3knAM= X-RZG-AUTH: :O2MIc0epdfgAjoV+frHI3UhxNCLBO5P+YS73lHhJYRD2uAuzaM+5N8MTpOrpK3il X-RZG-CLASS-ID: mo00 From: Wolfgang Rohdewald To: Henry Olders Subject: Re: scope of function parameters (take two) Date: Tue, 31 May 2011 10:37:50 +0200 User-Agent: KMail/1.13.6 (Linux/2.6.38-8-generic; KDE/4.6.3; x86_64; ; ) References: <201105310713.24842.wolfgang@rohdewald.de> In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: "python-list@python.org" X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: wolfgang@rohdewald.de 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: 14 NNTP-Posting-Host: 82.94.164.166 X-Trace: 1306831063 news.xs4all.nl 49047 [::ffff:82.94.164.166]:60964 X-Complaints-To: abuse@xs4all.nl Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:6720 On Dienstag 31 Mai 2011, Henry Olders wrote: > You're partially right - what I want is a function that is > free of side effects back through the parameters passed in > the function call. I don't know any object oriented language where it is not possible to change objects passed in as parameters. It is up to the passed object (a list in your case) to allow or disallow manipulations no matter how they are invocated, and the object is the same in the calling code and in the called function. -- Wolfgang