[Python-ideas] Batching/grouping function for itertools

[Chris Angelico]

On Mon, Dec 9, 2013 at 2:13 AM, Ron Adam <ron3200 at gmail.com> wrote:
> How about 2 lower level building blocks that would make these things easier
> to make and think about.
>
>
> Possibly function to take the next n items of an iterator without advancing
> it.

Fundamentally impossible. Here's a function that returns an iterator:

def d20():
    import random
    while True:
        yield random.randrange(1,21)

dice_roller = d20()

How are you going to take the next n items from dice_roller without
advancing it?

ChrisA