On Sun, Jun 19, 2022 at 11:03:45PM -0700, Jeremiah Paige wrote:
> What if next grew a new argument? Changing the signature of a builtin is a
> big change, but surely not bigger than new syntax? If we could ask for the
> number of items returned the original example might look like
>
> >>> first, second = next(iter(items), count=2)
There are times where "Not everything needs to be a one liner" applies.
# You can skip the first line if you know items is already an iterator.
it = iter(items)
first, second, third = (next(it) for i in range(3))
That's crying out to be made into a helper function. Otherwise our
one-liner is:
# Its okay to hate me for this :-)
first, second, third = (lambda obj: (it:=iter(obj)) and (next(it) for i in
range(3)))(items)
But that's basically islice. So:
# Its okay to put reusable helper functions in a module.
# Not everything has to be syntax.
first, second, third = itertools.islice(items, 3)
I think that we have a working solution for this problem; the only
argument is whether or not that problem is common enough, or special
enough, or the solution clunky enough, to justify a syntax solution.
--
Steve
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