[Python-ideas] Where did we go wrong with negative stride?

[Robert Kern]

On 2013-10-29 00:41, Tim Peters wrote:

> When you see things like
>
>      s[i:j;k] = s[i:j][::k]
>
> *nobody* is suggesting using the spelling on the RHS.  They're
> pointing out a pleasant mathematical equivalence.

Actually, I am suggesting that, in the case of negative k. It is much easier to 
learn, read, and reason about the composition of those two operations than any 
[i:j:k] construction, not matter what semantics you apply to that syntax.

That said, I always use this in numpy where slices are practically free.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco