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

Groups > comp.lang.python > #77174

Re: python string, best way to concat

Path csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed3.news.xs4all.nl!xs4all!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; 'parameters': 0.04; 'mrab': 0.05; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'subject:string': 0.09; "%s'": 0.16; '%s,': 0.16; 'commas:': 0.16; 'received:80.91.229.3': 0.16; 'received:dip0.t-ipconnect.de': 0.16; 'received:plane.gmane.org': 0.16; 'received:t-ipconnect.de': 0.16; 'there?': 0.16; 'subject:python': 0.16; 'wrote:': 0.18; '>>>': 0.22; 'putting': 0.22; 'header:User-Agent:1': 0.23; 'header:X-Complaints-To:1': 0.27; 'tim': 0.29; "doesn't": 0.30; 'chase': 0.31; 'list': 0.37; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'how': 0.40; 'transfer': 0.82
X-Injected-Via-Gmane http://gmane.org/
To python-list@python.org
From Peter Otten <__peter__@web.de>
Subject Re: python string, best way to concat
Date Thu, 28 Aug 2014 00:59:30 +0200
Organization None
References <55bab2a0-e0bc-4398-90b4-c9937498f5d8@googlegroups.com> <53FE5EDD.9020502@mrabarnett.plus.com> <20140827174446.11a1cd01@bigbox.christie.dr>
Mime-Version 1.0
Content-Type text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding 7Bit
X-Gmane-NNTP-Posting-Host p57bd9c3c.dip0.t-ipconnect.de
User-Agent KNode/4.13.3
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 <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>
Newsgroups comp.lang.python
Message-ID <mailman.13534.1409180390.18130.python-list@python.org> (permalink)
Lines 23
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1409180390 news.xs4all.nl 2919 [2001:888:2000:d::a6]:53604
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:77174

Show key headers only | View raw

Tim Chase wrote:

> On 2014-08-27 23:42, MRAB wrote:
>> How many parameters are there? len(self.param)
>> 
>> Make that many placeholders and then join them together with commas:
>> 
>> ', '.join(['?'] * len(self.param))
> 
> I prefer the clarity of Peter Otten's suggestion of
> 
>   ', '.join('?' * len(self.param))
> 
> over the mild obscurity of putting it in a list before multiplying.

As long as the OP doesn't try to transfer this to other paramstyles:

>>> ", ".join(["%s"]*3)
'%s, %s, %s'
>>> ", ".join("%s"*3) # OOPS
'%, s, %, s, %, s'

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

Thread

python string, best way to concat dennisearlevans@gmail.com - 2014-08-27 13:31 -0700
  Re: python string, best way to concat Dan Stromberg <drsalists@gmail.com> - 2014-08-27 15:30 -0700
  Re: python string, best way to concat Peter Otten <__peter__@web.de> - 2014-08-28 00:34 +0200
  Re: python string, best way to concat MRAB <python@mrabarnett.plus.com> - 2014-08-27 23:42 +0100
  Re: python string, best way to concat Tim Chase <python.list@tim.thechases.com> - 2014-08-27 17:44 -0500
  Re: python string, best way to concat Chris Angelico <rosuav@gmail.com> - 2014-08-28 08:55 +1000
  Re: python string, best way to concat Peter Otten <__peter__@web.de> - 2014-08-28 00:59 +0200
  Re: python string, best way to concat MRAB <python@mrabarnett.plus.com> - 2014-08-28 08:12 +0100
  Re: python string, best way to concat peter <peter.mosley@talk21.com> - 2014-08-28 01:30 -0700
    Re: python string, best way to concat Marko Rauhamaa <marko@pacujo.net> - 2014-08-28 11:34 +0300
    Re: python string, best way to concat Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-08-28 09:43 +0100
    Re: python string, best way to concat Chris Angelico <rosuav@gmail.com> - 2014-08-28 18:58 +1000
    Re: python string, best way to concat Roy Smith <roy@panix.com> - 2014-08-28 08:08 -0400
      Re: python string, best way to concat Mihamina Rakotomandimby <mihamina.rakotomandimby@rktmb.org> - 2014-08-28 15:19 +0300
      Re: python string, best way to concat Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-08-28 15:48 +0100

csiph-web