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Re: Slice equivalent to dict.get

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On Thu, Mar 31, 2016 at 9:24 AM, Peter Otten <__peter__@web.de> wrote:
> But note:
>
>>>> def get(seq, index, default=None):
> ...     return (seq[index:index+1] or [default])[0]
> ...
>>>> get("abc", -1, "default")
> 'default'

The discontinuity between -1 and 0 in indexing is a pain in the rear.
Negative indexes are one of those things that may seem like a good
idea at first, but I think in the end it causes more trouble than it's
worth. There's nothing you can do with L[-x] that you can't do more
explicitly with L[len(L) - x].

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Slice equivalent to dict.get Steven D'Aprano <steve@pearwood.info> - 2016-04-01 02:07 +1100
  Re: Slice equivalent to dict.get Peter Otten <__peter__@web.de> - 2016-03-31 17:24 +0200
  Re: Slice equivalent to dict.get Ian Kelly <ian.g.kelly@gmail.com> - 2016-03-31 09:43 -0600
  Re: Slice equivalent to dict.get "Sven R. Kunze" <srkunze@mail.de> - 2016-03-31 18:05 +0200
  Re: Slice equivalent to dict.get Terry Reedy <tjreedy@udel.edu> - 2016-03-31 13:51 -0400
  Re: Slice equivalent to dict.get Zachary Ware <zachary.ware+pylist@gmail.com> - 2016-03-31 14:28 -0500

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