negative stride list slices
Julio Oña
thinmanj at gmail.com
Wed Sep 1 17:23:18 EDT 2004
Slice has three arguments, [begin:end:step]
when doing s[:-3:-1] you are asking the las to elements of the list in
reversed order.
regards.
On Wed, 01 Sep 2004 17:15:51 -0400, Peter Hansen <peter at engcorp.com> wrote:
> Reid Nichol wrote:
>
> > This was the part that I was refering to:
> >
> > +---+---+---+---+---+
> > | H | e | l | p | A |
> > +---+---+---+---+---+
> > 0 1 2 3 4 5
> > -5 -4 -3 -2 -1
> >
> > Does it not all work the same in practice?
>
> Can you explain how the above diagram explains David's
> example then:
>
> >>> s = 'HelpA'
> >>> s[:-3:-1]
> 'Ap'
>
> I don't find much connection between the diagram and
> where the -3 is actually slicing either.
>
> -Peter
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
--
Julio
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