[Python-ideas] PEP 479: Change StopIteration handling inside generators

[Chris Angelico]

On Wed, Nov 26, 2014 at 8:56 AM,  <random832 at fastmail.us> wrote:
> For something more concrete, we can consider a naive implementation of
> iteration over adjacent pairs:
>
> def pairs(x):
>     i = iter(x)
>     while True:
>         yield next(i), next(i)

Okay, it's simple and naive. How about this version:

def pairs(x):
    i = iter(x)
    for val in i:
        yield val, next(i)

Also simple, but subtly different from your version. What's the
difference? Will it be obvious to everyone who reads it?

ChrisA