negative stride list slices
Christopher T King
squirrel at WPI.EDU
Thu Sep 2 04:17:20 CEST 2004
On Wed, 1 Sep 2004, Shalabh Chaturvedi wrote:
> Does anyone else find it intuitive to expect that S[b:a:-1] be exactly
> reverse of S[a:b:1]?
No. S[a:b:1] includes the start index (a), but excludes the stop index
(b). Similarly, S[b:a:-1] includes the start index (b), but excludes the
stop index (a). Only if the stop indices were included (or the start
indices were excluded), thus making the indexing symmetrical, would I
expect the results to be symmetric.
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