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Groups > comp.lang.python > #91996

Re: How to access the low digits of a list

Newsgroups comp.lang.python
Date 2015-06-03 14:08 -0700
References <efe9d48e-9aaf-4e68-aa26-c83da32e80f5@googlegroups.com> <18a4709f-47c8-41f7-87d5-08bbb00166b6@googlegroups.com> <mailman.63.1433254823.13271.python-list@python.org>
Message-ID <11005554-e89f-407c-8720-fae1bb3fced8@googlegroups.com> (permalink)
Subject Re: How to access the low digits of a list
From Rustom Mody <rustompmody@gmail.com>

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On Tuesday, June 2, 2015 at 7:50:58 PM UTC+5:30, Ian wrote:
> On Tue, Jun 2, 2015 at 6:35 AM, Rustom Mody  wrote:
> > For that matter even this works
> > But I am not sure whats happening or that I like it
> >
> >>>> [x[-2:]  for x in lines]
> > ['12', '42', '49', '56', '25', '36', '49', '64', '81', '00']
> 
> x[-2:] selects all items in the sequence with index i such that len(x)
> - 2 <= i < len(x). For a sequence of length 2 or less, that's the
> entire sequence.

Thanks -- learn something
So it means that indices can give indexerror; slices cannot?
Seems fair enough put that way, but is visually counterintuitive

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Thread

How to access the low digits of a list fl <rxjwg98@gmail.com> - 2015-06-02 05:23 -0700
  Re: How to access the low digits of a list Joel Goldstick <joel.goldstick@gmail.com> - 2015-06-02 08:32 -0400
  Re: How to access the low digits of a list Frank Stutzman <stutzman@cat2.kjsl.com> - 2015-06-02 12:34 +0000
  Re: How to access the low digits of a list Rustom Mody <rustompmody@gmail.com> - 2015-06-02 05:35 -0700
    Re: How to access the low digits of a list Ian Kelly <ian.g.kelly@gmail.com> - 2015-06-02 08:19 -0600
      Re: How to access the low digits of a list Rustom Mody <rustompmody@gmail.com> - 2015-06-03 14:08 -0700
        Re: How to access the low digits of a list Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-06-03 22:41 +0100
        Re: How to access the low digits of a list Ian Kelly <ian.g.kelly@gmail.com> - 2015-06-03 16:36 -0600
        Re: How to access the low digits of a list Steven D'Aprano <steve@pearwood.info> - 2015-06-04 23:27 +1000
  Re: How to access the low digits of a list Steven D'Aprano <steve@pearwood.info> - 2015-06-03 01:11 +1000

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