Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From: Antoon Pardon <antoon.pardon@rece.vub.ac.be>
Newsgroups: comp.lang.python
Subject: Re: I'm wrong or Will we fix the ducks limp?
Date: Thu, 9 Jun 2016 12:19:35 +0200
Lines: 34
Message-ID: <mailman.103.1465467609.2306.python-list@python.org>
References: <a1ff5170-e059-4379-b16a-d9eff8bc60a0@googlegroups.com> <mailman.20.1465186091.2306.python-list@python.org> <575599f4$0$1595$c3e8da3$5496439d@news.astraweb.com> <drn56cFn10fU1@mid.individual.net> <57569f6a$0$11124$c3e8da3@news.astraweb.com> <5756BED8.2000304@rece.vub.ac.be> <1465313620.1380508.630546953.7F7E755D@webmail.messagingengine.com> <5757CF15.4010002@rece.vub.ac.be> <mailman.70.1465372469.2306.python-list@python.org> <5757dbaf$0$1615$c3e8da3$5496439d@news.astraweb.com> <5757E840.80805@rece.vub.ac.be> <mailman.72.1465378914.2306.python-list@python.org> <nj8s9k$p3$1@dont-email.me> <5757FB1B.5000502@rece.vub.ac.be> <mailman.75.1465383739.2306.python-list@python.org> <nj93dn$pf1$1@dont-email.me> <5758292E.2020600@rece.vub.ac.be> <mailman.80.1465395544.2306.python-list@python.org> <871t474ox1.fsf@elektro.pacujo.net> <57591B21.7050509@rece.vub.ac.be> <mailman.92.1465457475.2306.python-list@python.org> <87inxipvmk.fsf@elektro.pacujo.net> <575942B7.5030905@rece.vub.ac.be>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-Trace: news.uni-berlin.de OONKkScockJqvTvqchNQnAsexWAyOxiWqmT8xbAmgHvA==
Return-Path: <antoon.pardon@rece.vub.ac.be>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.001
X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'python,': 0.02; 'received:134': 0.05; 'differently': 0.07; 'behave': 0.09; 'int.': 0.09; 'python': 0.10; 'python.': 0.11; 'languages,': 0.15; 'languages.': 0.15; 'variables': 0.15; '11:19': 0.16; 'attribute,': 0.16; 'different,': 0.16; 'evaluates': 0.16; 'expressions.': 0.16; 'received:ac.be': 0.16; 'received:io': 0.16; 'received:psf.io': 0.16; 'variable': 0.18; 'header:In-Reply-To:1': 0.24; 'header:User-Agent:1': 0.26; "doesn't": 0.26; 'environment': 0.29; 'received:be': 0.30; 'something': 0.35; 'but': 0.36; 'lines': 0.36; 'to:addr:python-list': 0.36; 'subject:?': 0.36; 'subject:: ': 0.37; 'difference': 0.38; 'no,': 0.38; 'subject:the': 0.39; 'rather': 0.39; 'to:addr:python.org': 0.40; 'still': 0.40; 'different': 0.63; 'forward': 0.66; 'schreef': 0.84; 'struct.': 0.84
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: ArIIAHYeUleGuA9G/2dsb2JhbABehFsBvRCGEgKCAAEBAQEBAWaEbQEBBCNVEQsaAgUWCwICCQMCAQIBRRMIAogrsU2NPoNbAQEIAiWBAYUmhE2FDII1glkBBJhFgVeMTYkzhWmPUlSDcIp+AQEB
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Icedove/38.8.0
In-Reply-To: <87inxipvmk.fsf@elektro.pacujo.net>
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.22
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>
X-Mailman-Original-Message-ID: <575942B7.5030905@rece.vub.ac.be>
X-Mailman-Original-References: <a1ff5170-e059-4379-b16a-d9eff8bc60a0@googlegroups.com> <mailman.20.1465186091.2306.python-list@python.org> <575599f4$0$1595$c3e8da3$5496439d@news.astraweb.com> <drn56cFn10fU1@mid.individual.net> <57569f6a$0$11124$c3e8da3@news.astraweb.com> <5756BED8.2000304@rece.vub.ac.be> <1465313620.1380508.630546953.7F7E755D@webmail.messagingengine.com> <5757CF15.4010002@rece.vub.ac.be> <mailman.70.1465372469.2306.python-list@python.org> <5757dbaf$0$1615$c3e8da3$5496439d@news.astraweb.com> <5757E840.80805@rece.vub.ac.be> <mailman.72.1465378914.2306.python-list@python.org> <nj8s9k$p3$1@dont-email.me> <5757FB1B.5000502@rece.vub.ac.be> <mailman.75.1465383739.2306.python-list@python.org> <nj93dn$pf1$1@dont-email.me> <5758292E.2020600@rece.vub.ac.be> <mailman.80.1465395544.2306.python-list@python.org> <871t474ox1.fsf@elektro.pacujo.net> <57591B21.7050509@rece.vub.ac.be> <mailman.92.1465457475.2306.python-list@python.org> <87inxipvmk.fsf@elektro.pacujo.net>
Xref: csiph.com comp.lang.python:109723

Op 09-06-16 om 11:19 schreef Marko Rauhamaa:
>
>> In a rather straight forward environment with classes/structs that
>> have an x and y attribute, the following lines behave differently
>> in C and Python.
>>
>>   A.x = 1;
>>   A.y = 2;
>>
>>   B = A;
>>
>>   B.x = 3;
>>   B.y = 4;
>>
>> In C the variable A will still be x:1, y:2.
>> In Python the variable A will be x:3, y:4.
>>
>> So no, Python doesn't do the exact same thing with variables as C.
> The difference is not in the variables but in the expressions. In
> Python,
>
>     1
>
> evaluates to a pointer; in C, it evaluates to an int. Furthermore, in
> Python,
>
>     A
>
> evaluates to a pointer; in C, it evaluates to a struct.

If a variable evaluates to something different, in different
languages, the variable don't do the exact same thing in
the different languages.