Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #40339

Re: Is it correct this way to inherit from a list?

Path csiph.com!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed3.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path <python-python-list@m.gmane.org>
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; 'method.': 0.05; 'os.path': 0.09; 'overridden': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'wrong,': 0.09; 'def': 0.10; '[and': 0.16; 'instantiate': 0.16; 'key):': 0.16; 'received:80.91.229.3': 0.16; 'received:dip.t-dialin.net': 0.16; 'received:plane.gmane.org': 0.16; 'received:t-dialin.net': 0.16; 'subclassing': 0.16; 'wrote:': 0.17; 'exists': 0.17; 'import': 0.21; 'example': 0.23; 'class.': 0.23; 'header:User-Agent:1': 0.26; 'correct': 0.28; 'header:X-Complaints-To:1': 0.28; 'subject:list': 0.28; 'methods.': 0.29; 'skip:_ 10': 0.29; 'class': 0.29; 'code': 0.31; 'to:addr:python-list': 0.33; 'another': 0.33; 'list': 0.35; 'expected': 0.35; 'subject:?': 0.35; 'something': 0.35; 'received:org': 0.36; 'really': 0.36; 'method': 0.36; 'possible': 0.37; 'subject:: ': 0.38; 'to:addr:python.org': 0.39; 'header:Received:5': 0.40; 'customized': 0.64; 'subject:this': 0.84; 'redefining': 0.91
X-Injected-Via-Gmane http://gmane.org/
To python-list@python.org
From Peter Otten <__peter__@web.de>
Subject Re: Is it correct this way to inherit from a list?
Date Sat, 02 Mar 2013 18:19:29 +0100
Organization None
References <kgtbb9$3ps$1@tdi.cu.mi.it>
Mime-Version 1.0
Content-Type text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding 7Bit
X-Gmane-NNTP-Posting-Host p5084963f.dip.t-dialin.net
User-Agent KNode/4.7.3
X-BeenThere python-list@python.org
X-Mailman-Version 2.1.15
Precedence list
List-Id General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe <http://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 <http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups comp.lang.python
Message-ID <mailman.2779.1362244783.2939.python-list@python.org> (permalink)
Lines 24
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1362244783 news.xs4all.nl 6975 [2001:888:2000:d::a6]:45477
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:40339

Show key headers only | View raw

gialloporpora wrote:

> I would like to inherit from the list native class.
> really I expected that was possible to use native list method without
> redefining them, for example the __repr__ method.
> 
> I don't know if i have made something wrong, this is my code (I obmit
> customized methods that I have added):
> 
> from os.path import exists
> 
> class vector(list):

> def __getitem__(self, key):
>     return self._list[key]

[and many more]

> Is it correct or it exists another way to inherit from list class?

Have you considered subclassing collections.MutableSequence instead?
You cannot instantiate that class until you have overridden all its abstract 
methods.

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Is it correct this way to inherit from a list? gialloporpora <gialloporpora@gmail.com> - 2013-03-02 18:02 +0100
  Re: Is it correct this way to inherit from a list? Peter Otten <__peter__@web.de> - 2013-03-02 18:19 +0100
  Re: Is it correct this way to inherit from a list? Ian Kelly <ian.g.kelly@gmail.com> - 2013-03-02 10:22 -0700
  Re: Is it correct this way to inherit from a list? Ian Kelly <ian.g.kelly@gmail.com> - 2013-03-02 10:26 -0700
    Re: Is it correct this way to inherit from a list? gialloporpora <gialloporpora@gmail.com> - 2013-03-03 03:33 +0100
  Re: Is it correct this way to inherit from a list? Rick Johnson <rantingrickjohnson@gmail.com> - 2013-03-02 09:46 -0800
    Re: Is it correct this way to inherit from a list? gialloporpora <gialloporpora@gmail.com> - 2013-03-03 03:30 +0100
      Re: Is it correct this way to inherit from a list? Chris Angelico <rosuav@gmail.com> - 2013-03-03 14:18 +1100
      Re: Is it correct this way to inherit from a list? "Colin J. Williams" <cjw@ncf.ca> - 2013-03-03 09:21 -0500
        Re: Is it correct this way to inherit from a list? Jason Swails <jason.swails@gmail.com> - 2013-03-03 15:40 -0500

csiph-web