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Re: How to access the low digits of a list

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Date Tue, 2 Jun 2015 08:32:00 -0400
Subject Re: How to access the low digits of a list
From Joel Goldstick <joel.goldstick@gmail.com>
Cc "python-list@python.org" <python-list@python.org>
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On Tue, Jun 2, 2015 at 8:23 AM, fl <rxjwg98@gmail.com> wrote:
> Hi,
>
> I have a list:
>
>
>
>
>
>
>>>> lines
> ['12', '42', '49', '156', '225', '36', '49', '164', '11181', '3100']
>
>
>
> I want to access the last two digits. That is:
>
> ['12', '42', '49', '56', '25', '36', '49', '64', '81', '00']
>
>
> When I try to use lines[3][0] is '1'
> lines[3][1] is '5'
> lines[3][2] is '6'
>
>
> I don't know whether there is a way to know the length of lines[3]. Then, I
> can use a -1 step to get the last two digits. Or, you may have much better
> ways to do that. Python is really too versatile I feel.
>
> Thanks,
> --
> https://mail.python.org/mailman/listinfo/python-list

You should read about slices

lines[3][-2:]  will give the last two characters in the 3rd group
(starting from 0)

The notation means to start with 2 from the end, and proceed to the end


-- 
Joel Goldstick
http://joelgoldstick.com

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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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