[Python-3000] PEP: rename it.next() to it.__next__(), add a next() built-in

[Ka-Ping Yee]

One possibility for making a next() built-in more useful:

    Just like getattr, two-argument next(iter, sentinel)
    returns sentinel if StopException is caught.

If you've used .next() explicitly, would this be handy?

(Or, what convenience would you want in a next() builtin?)


-- ?!ng