Path: csiph.com!usenet.pasdenom.info!dedibox.gegeweb.org!gegeweb.eu!nntpfeed.proxad.net!proxad.net!feeder1-2.proxad.net!usenet-fr.net!nerim.net!novso.com!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 0.002 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'python,': 0.02; 'subject:: [': 0.03; 'output': 0.04; 'subject:question': 0.08; 'arguments,': 0.09; 'explanation': 0.09; 'follows.': 0.09; 'happens.': 0.09; 'cc:addr:python-list': 0.10; '>the': 0.16; 'concatenated': 0.16; 'mutated': 0.16; 'nonetheless': 0.16; 'string': 0.17; 'creates': 0.18; 'subject:] ': 0.19; 'parameters': 0.20; 'question.': 0.20; 'x-mailer:apple mail (2.1084)': 0.22; 'cc:2**0': 0.23; 'statement': 0.23; 'cc:no real name:2**0': 0.24; 'cc:addr:python.org': 0.25; 'header:In-Reply-To:1': 0.25; 'str': 0.29; 'url:mailman': 0.29; 'returned': 0.30; 'function': 0.30; 'lists': 0.31; 'url:python': 0.32; 'subject:lists': 0.32; 'print': 0.32; 'url:listinfo': 0.32; 'right?': 0.33; 'received:google.com': 0.34; 'thanks': 0.34; 'list': 0.35; 'expected': 0.35; 'received:209.85': 0.35; 'but': 0.36; 'message-id:@gmail.com': 0.36; 'url:org': 0.36; 'passed': 0.37; 'received:209': 0.37; 'nothing': 0.38; 'sure': 0.38; 'takes': 0.39; 'called': 0.39; 'header:Received:5': 0.40; 'url:mail': 0.40; 'your': 0.60; 'header :Message-Id:1': 0.62; 'different': 0.63; 'more': 0.63; 'received:ru': 0.81; 'dealt': 0.91; 'str.': 0.91 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=subject:mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to:x-mailer; bh=Xf4ZuIkLTuq7LG4Jw9jW2DZTKH/Ivj5STy1treq4gb4=; b=D/S6kgsCZw1PX+7Vl07hXFs4YgLp8O3C94uh1HpYOgbB1IJKTeELa3FnW2nzb4Gp6b ADXdtVC2MXM6NQOwx6yQnDgAUmce9/bkdOFvjAtwFa8t4rcCBB+5NwUEZ5dGhIckLEfB 10dFE95IPbGPTSnRC1WmUMDH9q1oKUFbIhHdKuBH3MYWaU4sApv4oLXTMwrc1tvJaPH9 jnEXMnoSuvQHKcKpShZVaPphQRgcvCJAqslixv/AoHLYVULw6mMaGVfot6wQBRddN+Xk jvCvCjiQi6vkH0C+RoLkETF1Q7yT7panMJHKtc+m6BT1VMTIIKNmR5cRexY3Im1uYDpU rI1w== Subject: Re: [newbie] A question about lists and strings Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: text/plain; charset=koi8-r From: Roman Vashkevich In-Reply-To: Date: Fri, 10 Aug 2012 14:56:23 +0400 Content-Transfer-Encoding: quoted-printable References: <39A401F0-12DD-464F-A0D1-639C56FA48A0@gmail.com> To: Mok-Kong Shen X-Mailer: Apple Mail (2.1084) Cc: python-list@python.org X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 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: 26 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1344596189 news.xs4all.nl 6968 [2001:888:2000:d::a6]:42833 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:26861 10.08.2012, =D7 14:12, Mok-Kong Shen =CE=C1=D0=C9=D3=C1=CC(=C1): > Am 10.08.2012 11:48, schrieb Roman Vashkevich: >> [snip] > >The function .... It takes list by reference and creates a new local > > str. When it's called with listb and strb arguments, listb is passed > > by reference and mutated. A string "sss" is concatenated with an > > empty local str. Nothing more happens. Since local str is not > > returned by xx(), it can not be expected to be printed out in the > > statement that follows. What is printed out in the print statement = is > > the mutated listb and the global strb. >=20 > Thanks for the explanation of the output obtained. But this means > nonetheless that parameters of types lists and strings are dealt with > in "inherently" (semantically) different ways by Python, right? >=20 > M. K. Shen >=20 > --=20 > http://mail.python.org/mailman/listinfo/python-list I am not sure I understand your question. Can you rephrase it or make it = more explicit? RV=