Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!xlned.com!feeder5.xlned.com!news2.euro.net!newsgate.cistron.nl!newsgate.news.xs4all.nl!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 0.000
X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'append': 0.09; 'assigning': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'def': 0.12; "'b',": 0.16; "'c',": 0.16; "['a',": 0.16; 'possible?': 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; 'side.': 0.16; 'stumbled': 0.16; 'tup': 0.16; 'tuple': 0.16; 'variables:': 0.16; ':-)': 0.16; 'wrote:': 0.18; 'variable': 0.18; '>>>': 0.22; 'header:User-Agent:1': 0.23; 'least': 0.26; 'header:X -Complaints-To:1': 0.27; 'tim': 0.29; 'chase': 0.31; 'quite': 0.32; 'subject:the': 0.34; 'could': 0.34; 'but': 0.35; 'var': 0.36; 'wrong': 0.37; 'list': 0.37; 'step': 0.37; 'star': 0.38; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'skip:* 10': 0.61; 'step,': 0.84
X-Injected-Via-Gmane: http://gmane.org/
To: python-list@python.org
From: Peter Otten <__peter__@web.de>
Subject: Re: Process tuple contents on the fly
Date: Mon, 15 Apr 2013 21:07:32 +0200
Organization: None
References: <f51058c3-0e36-429c-85d9-365be82b548f@googlegroups.com> <20130415135013.58430065@bigbox.christie.dr>
Mime-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 7Bit
X-Gmane-NNTP-Posting-Host: p5084aa7b.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.642.1366052854.3114.python-list@python.org>
Lines: 39
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1366052854 news.xs4all.nl 2670 [2001:888:2000:d::a6]:53690
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:43638

Tim Chase wrote:

> On 2013-04-15 11:25, Gnarlodious wrote:
>> Say I have a tuple I want to expand assigning to variables:
>> 
>> tup = *func()
>> var = tup[0]
>> lst.append(tup[1])
>> 
>> Or could I do it in one line?
>> 
>> var, lst.append() = *func()
>> 
>> So I want to append one variable to a list on the fly, is it
>> possible?
> 
> I stumbled across this atrocity[*], which if you chose to use it,
> you'd deserve a kick in the pants:
> 
>   lst.append("Value I don't care about and will overwrite")
>   var, lst[-1] = *func()
> 
> It's not quite one step, but at least the *assignment* is one step :-)

I think the star is on the wrong side. 


So:

>>> items = ["a", "b", "c"]
>>> def f(result=(4, 5, 6)): return result
... 
>>> var, *items[len(items):] = f()
>>> var
4
>>> items
['a', 'b', 'c', 5, 6]