[Python-ideas] Reduce/fold and scan with generator expressions and comprehensions

[Chris Angelico]

On Mon, Oct 24, 2016 at 11:29 AM, Steven D'Aprano <steve at pearwood.info> wrote:
> In fairness I am sick and if I were well I may have been able to keep
> this straight in my head, but calling the variable "prev" is actively
> misleading. I was mislead, and (I think) Chris who just suggested this
> was similar to the SQL "lag" function may have been mislead as well. (Or
> perhaps he was just mislead by me, in which case, sorry Chris!)

All of the above are possible. I'm skimming the thread, not reading it
in full, and I'm a bit lost as to the point of the proposal, so it's
entirely possible that lag() is unrelated.

But if it is indeed just reduce(), then it's even simpler.

ChrisA