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

Groups > comp.lang.python > #30745

Re: sum function

Path csiph.com!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path <ian.g.kelly@gmail.com>
X-Original-To python-list@python.org
Delivered-To python-list@mail.python.org
X-Spam-Status OK 0.072
X-Spam-Evidence '*H*': 0.86; '*S*': 0.00; 'none)': 0.07; 'col': 0.16; 'oct': 0.16; 'wrote:': 0.17; 'thu,': 0.17; 'header:In-Reply-To:1': 0.25; 'message-id:@mail.gmail.com': 0.27; 'received:209.85.215.46': 0.30; 'print': 0.32; 'to:addr:python- list': 0.33; 'received:google.com': 0.34; 'pm,': 0.35; 'received:209.85': 0.35; 'received:209': 0.37; 'subject:: ': 0.38; 'to:addr:python.org': 0.39; 'header:Received:5': 0.40; 'total': 0.65; 'to:name:python': 0.84
DKIM-Signature v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; bh=F1bhmvUmtohwL2CR4Ueq/v5TI5dOjeccmR3WRy7C/Cg=; b=Zc+Lrg6QrWeEkwFmrsh5QY/qNhgElPtS9wk3hh+zyHCLaPBNySt32yieENSb81m1np h2fU5MxBRqk2AZ5w7CW5ZFErQ45TeoCm9I7ksNyid/9DZE8iYmliH/FbQJobE/aUgFKe vavMnqPij3lp7vjimC308czLOuUgH1ly7cQkMziOuO7DxIVo37XTcQnQqk6ppGmQ6MT/ EwY2CVzcnQcaB282xXmsqL7AAumdoLiHVXaBzPVSRL/SyyFrT5wK+rxIjVxnOqEstECD iqlYaHStAtW+ORn6YFgvJAwg9nhnBo7dZ8n0NoGMAJfxDMdTWfB10j6o5F5F7CP9Q005 NewA==
MIME-Version 1.0
In-Reply-To <7c7beccb-72e4-4cfb-958d-4a7235076fb3@googlegroups.com>
References <7c7beccb-72e4-4cfb-958d-4a7235076fb3@googlegroups.com>
From Ian Kelly <ian.g.kelly@gmail.com>
Date Thu, 4 Oct 2012 15:04:53 -0600
Subject Re: sum function
To Python <python-list@python.org>
Content-Type text/plain; charset=ISO-8859-1
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.1809.1349384724.27098.python-list@python.org> (permalink)
Lines 17
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1349384724 news.xs4all.nl 6977 [2001:888:2000:d::a6]:37572
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:30745

Show key headers only | View raw

On Thu, Oct 4, 2012 at 2:52 PM,  <mike20007@gmail.com> wrote:
> scanner = client.scannerOpenWithStop("tab", "10", "1000", ["cf:col1"])
> total = 0.0
> r = client.scannerGet(scanner)
> while r:
>   for k in (r[0].columns):
>     total += float(r[0].columns[k].value)
>   r = client.scannerGet(scanner)
>
> print total
>
> Do you know of better (faster) way to do sum?

scanner = client.scannerOpenWithStop("tab", "10", "1000", ["cf:col1"])
next_r = itertools.partial(client.scannerGet, scanner)
total = sum(float(col.value) for r in iter(next_r, None) for col in
r.itervalues())

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

Thread

sum function mike20007@gmail.com - 2012-10-04 13:52 -0700
  Re: sum function Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-04 15:04 -0600
    Re: sum function Mike <mike20007@gmail.com> - 2012-10-04 14:31 -0700
    Re: sum function Mike <mike20007@gmail.com> - 2012-10-04 14:31 -0700
  Re: sum function Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-04 15:05 -0600
    Re: sum function Mike <mike20007@gmail.com> - 2012-10-04 14:29 -0700
      Re: sum function Dave Angel <d@davea.name> - 2012-10-04 17:39 -0400
        Re: sum function Mike <mike20007@gmail.com> - 2012-10-04 17:40 -0700
          Re: sum function Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-04 18:59 -0600
            Re: sum function Mike <mike20007@gmail.com> - 2012-10-04 19:01 -0700
              Re: sum function Ramchandra Apte <maniandram01@gmail.com> - 2012-10-05 01:31 -0700
              Re: sum function Ramchandra Apte <maniandram01@gmail.com> - 2012-10-05 01:31 -0700
            Re: sum function Mike <mike20007@gmail.com> - 2012-10-04 19:01 -0700
        Re: sum function Mike <mike20007@gmail.com> - 2012-10-04 17:40 -0700
      Re: sum function Chris Angelico <rosuav@gmail.com> - 2012-10-05 07:34 +1000
    Re: sum function Mike <mike20007@gmail.com> - 2012-10-04 14:29 -0700
  Re: sum function Mike <mike20007@gmail.com> - 2012-10-05 06:39 -0700
    Re: sum function Ramchandra Apte <maniandram01@gmail.com> - 2012-10-05 06:41 -0700
      Re: sum function Mike <mike20007@gmail.com> - 2012-10-05 06:47 -0700
        Re: sum function Terry Reedy <tjreedy@udel.edu> - 2012-10-05 14:52 -0400
          Re: sum function Mike <mike20007@gmail.com> - 2012-10-05 13:09 -0700
            Re: sum function Dave Angel <d@davea.name> - 2012-10-05 16:26 -0400
              Re: sum function Ramchandra Apte <maniandram01@gmail.com> - 2012-10-06 05:38 -0700
          Re: sum function Mike <mike20007@gmail.com> - 2012-10-05 13:09 -0700
    Re: sum function Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-05 13:29 -0600
  Re: sum function Mike <mike20007@gmail.com> - 2012-10-05 13:03 -0700
    Re: sum function Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-05 14:10 -0600
      Re: sum function Mike <mike20007@gmail.com> - 2012-10-05 14:19 -0700

csiph-web