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Re: sum function

References <7c7beccb-72e4-4cfb-958d-4a7235076fb3@googlegroups.com>
From Ian Kelly <ian.g.kelly@gmail.com>
Date 2012-10-04 15:04 -0600
Subject Re: sum function
Newsgroups comp.lang.python
Message-ID <mailman.1809.1349384724.27098.python-list@python.org> (permalink)

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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())

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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

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