[Python-Dev] PEP 492: async/await in Python; v3

[Greg Ewing]

Guido van Rossum wrote:
> There's a cost to __future__ imports 
> too. The current proposal is a pretty clever hack -- and we've done 
> similar hacks in the past

There's a benefit to having a __future__ import beyond
avoiding hackery: by turning on the __future__ you can
find out what will break when they become real keywords.

But I suppose that could be achieved by having both the
hack *and* the __future__ import available.

-- 
Greg