[Python-Dev] Lukewarm about range literals

[Greg Wilson]

> > Ka-Ping Yee <ping@lfw.org>:
> >    for i in 1 .. 10:
> >        print i*i
> >    for i in 0 ..! len(a):
> >        a[i] += 1

Greg Wilson writes:

The problem with using ellipsis is that there's no obvious way to include
a stride --- how do you hit every second (or n'th) element, rather than
every element?  I'd rather stick to range() than adopt:

    for i in [1..10:5]

Thanks,
Greg

BTW, I understand from side conversations that adding a 'keys()' method to
sequences, so that arbitrary collections could be iterated over using:

    for i in S.keys():
        print i, S[i]

was considered and rejected.  If anyone knows why, I'd be grateful for a
recap.