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Re: range() vs xrange() Python2|3 issues for performance

References <prNZp.31508$js7.12436@newsfe01.iad> <4e3a0b9f$0$29968$c3e8da3$5496439d@news.astraweb.com>
Date 2011-08-04 07:59 +0100
Subject Re: range() vs xrange() Python2|3 issues for performance
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.1878.1312441150.1164.python-list@python.org> (permalink)

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On Thu, Aug 4, 2011 at 4:01 AM, Steven D'Aprano
<steve+comp.lang.python@pearwood.info> wrote:
>        a, b = divmod(n, i)
>        if b == 0:
>            total += a+i
>

Wouldn't this fail on squares? It happens to give correct results as
far as I've checked; no square up to 10,000 is called perfect, and
there are no perfect squares in that range, but I think it's
technically using an incorrect intermediate result.

ChrisA

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Thread

range() vs xrange()  Python2|3 issues for performance harrismh777 <harmar@member.fsf.org> - 2011-08-02 02:12 -0500
  Re: range() vs xrange()  Python2|3 issues for performance garabik-news-2005-05@kassiopeia.juls.savba.sk - 2011-08-02 07:51 +0000
  Re: range() vs xrange()  Python2|3 issues for performance Peter Otten <__peter__@web.de> - 2011-08-02 11:05 +0200
  Re: range() vs xrange()  Python2|3 issues for performance Stefan Behnel <stefan_ml@behnel.de> - 2011-08-02 11:20 +0200
  Re: range() vs xrange()  Python2|3 issues for performance Thomas Rachel <nutznetz-0c1b6768-bfa9-48d5-a470-7603bd3aa915@spamschutz.glglgl.de> - 2011-08-02 11:26 +0200
  Re: range() vs xrange() Python2|3 issues for performance Chris Angelico <rosuav@gmail.com> - 2011-08-02 10:52 +0100
  Re: range() vs xrange() Python2|3 issues for performance Chris Angelico <rosuav@gmail.com> - 2011-08-02 11:19 +0100
  Re: range() vs xrange()  Python2|3 issues for performance Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-08-03 00:45 +1000
    Re: range() vs xrange() Python2|3 issues for performance Chris Angelico <rosuav@gmail.com> - 2011-08-02 17:06 +0100
  Re: range() vs xrange()  Python2|3 issues for performance Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-08-04 13:01 +1000
    Re: range() vs xrange() Python2|3 issues for performance Chris Angelico <rosuav@gmail.com> - 2011-08-04 07:59 +0100
      Re: range() vs xrange() Python2|3 issues for performance Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-08-04 19:56 +1000

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