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Re: A bug?

From Denis McMahon <denismfmcmahon@gmail.com>
Newsgroups comp.lang.python
Subject Re: A bug?
Date 2014-10-29 02:17 +0000
Organization A noiseless patient Spider
Message-ID <m2pinn$hum$2@dont-email.me> (permalink)
References <f491d969-7405-4017-b9c4-e1cb52a70280@googlegroups.com> <m2mof5$hvh$2@dont-email.me> <mailman.15248.1414459811.18130.python-list@python.org>

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On Tue, 28 Oct 2014 01:29:28 +0000, Joshua Landau wrote:

> On 28 October 2014 00:36, Denis McMahon <denismfmcmahon@gmail.com>
> wrote:
>>
>> d = [[list(range(1,13))[i*3+j] for j in range(3)] for i in range(4)]
> 
> A quick note. Ranges (even 2.7's xrange) are all indexable. The cast to
> a list isn't needed.

Until you apply Chris' slicing trick, and then:

>>> [list(range(1,13))[i*3:i*3+3] for i in range(4)]
[[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]]
>>> [range(1,13)[i*3:i*3+3] for i in range(4)]
[range(1, 4), range(4, 7), range(7, 10), range(10, 13)]
>>> 

Depends how important it is that you get a list and not a range object ;)

(Thinking back to a recent discussion where someone was taking str(range
(x)) and not getting the expected results)

-- 
Denis McMahon, denismfmcmahon@gmail.com

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Thread

A bug? "umatrp@gmail.com" <trsexgl@gmail.com> - 2014-10-27 09:01 -0700
  Re: A bug? Wolfgang Maier <wolfgang.maier@biologie.uni-freiburg.de> - 2014-10-27 17:17 +0100
  Re: A bug? Ian Kelly <ian.g.kelly@gmail.com> - 2014-10-27 10:26 -0600
  Re: A bug? Denis McMahon <denismfmcmahon@gmail.com> - 2014-10-28 00:36 +0000
    Re: A bug? Rustom Mody <rustompmody@gmail.com> - 2014-10-27 18:12 -0700
      Re: A bug? Chris Angelico <rosuav@gmail.com> - 2014-10-28 12:25 +1100
        Re: A bug? Rustom Mody <rustompmody@gmail.com> - 2014-10-27 19:13 -0700
    Re: A bug? Joshua Landau <joshua@landau.ws> - 2014-10-28 01:29 +0000
      Re: A bug? Denis McMahon <denismfmcmahon@gmail.com> - 2014-10-29 02:17 +0000
        What for -- for?  (was A bug?) Rustom Mody <rustompmody@gmail.com> - 2014-10-28 20:22 -0700
          Re: What for -- for? (was A bug?) Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-10-28 23:16 -0500
          Re: What for -- for? (was A bug?) Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-10-28 23:23 -0500
            Re: What for -- for? (was A bug?) Rustom Mody <rustompmody@gmail.com> - 2014-10-28 21:40 -0700
              Re: What for -- for? (was A bug?) Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-10-28 23:59 -0500
                Re: What for -- for? (was A bug?) Rustom Mody <rustompmody@gmail.com> - 2014-10-28 22:15 -0700
                Re: What for -- for? (was A bug?) Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-10-29 00:39 -0500
                Re: What for -- for? (was A bug?) Rustom Mody <rustompmody@gmail.com> - 2014-10-28 23:11 -0700
                Re: What for -- for? (was A bug?) Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-10-29 01:18 -0500
                Finding way around ABCs (was What for -- for? (was A bug?)) Rustom Mody <rustompmody@gmail.com> - 2014-10-30 10:01 -0700
                Re: Finding way around ABCs (was What for -- for? (was A bug?)) Ian Kelly <ian.g.kelly@gmail.com> - 2014-10-30 11:09 -0600
                Re: Finding way around ABCs (was What for -- for? (was A bug?)) Rustom Mody <rustompmody@gmail.com> - 2014-10-30 10:16 -0700
                Re: Finding way around ABCs (was What for -- for? (was A bug?)) Ian Kelly <ian.g.kelly@gmail.com> - 2014-10-30 11:11 -0600
          Re: What for -- for? (was A bug?) Ben Finney <ben+python@benfinney.id.au> - 2014-10-29 16:27 +1100
          Re: What for -- for? (was A bug?) Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-10-29 00:42 -0500
            Re: What for -- for? (was A bug?) Rustom Mody <rustompmody@gmail.com> - 2014-10-28 22:57 -0700
          Re: What for -- for? (was A bug?) Ben Finney <ben+python@benfinney.id.au> - 2014-10-29 17:02 +1100
          Re: What for -- for? (was A bug?) Joshua Landau <joshua@landau.ws> - 2014-10-30 17:21 +0000
            Re: What for -- for? (was A bug?) Rustom Mody <rustompmody@gmail.com> - 2014-10-30 10:41 -0700

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