Would the builtins import look like this:
if not hasattr(__builtins__, 'first'):
from more_itertools.more import first
Or this:
import sys
if sys.version_info[:2] < (3,9):
from more_itertools.more import first
Having the same argspec as more_itertools.more.first would get us a free
backport.
On Fri, Dec 13, 2019, 6:05 PM Oscar Benjamin <oscar.j.benja...@gmail.com>
wrote:
> On Fri, 13 Dec 2019 at 22:47, Tim Peters <tim.pet...@gmail.com> wrote:
> >
> > [Christopher Barker]
> > >> I think we all agree that it does not belong in __builtins__,
> >
> > [Greg Ewing]
> > > Do we?
> >
> > Nobody yet has argued in favor of it - or even suggested it.
> >
> > > I'm not convinced.
> >
> > And that remains true even now ;-) The new part here is that yours is
> > the first message to mention it that did _not_ say outright that
> > first() does not belong in the builtins.
> >
> > > We already have all() and any() in builtins, which are similar
> > > in that they operate on iterators or iterables.
> >
> > Also things like map() and zip(), but things like that predate
> > itertools. My view is that first() just isn't likely to be used often
> > enough to merit making it a builtin. all() and any() are. If we had
> > it to do over, I bet zip() would have been assigned to itertools.
> > map() is too close to call, although these days, in new code, I
> > usually see a list comprehension where I used to see map().
>
> I think that first could get wider usage than next. Outside of
> implementing abstract iterator tools my experience is that the bulk of
> situations in which next is used/suggested would be better handled by
> (the raising version of) first.
>
> --
> Oscar
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