[Python-Dev] future and present

[David Ascher]

Guido van Rossum wrote:
> 
> > If a script has
> >     from __future__ import nested_scopes
> > and is run by Python 2.2, should the interpreter complain?
> 
> Of course not!  The whole point of the future statement is that it
> should be harmless once you're *in* that future (unless the future
> feature ends up retracted -- think of it as an alternate universe, a
> side effect of time machine misuse :-).

Although there could be a warning (off by default) in 2.3 or whenever to
let users know that the code is no longer needed.  People tend to cut &
paste and reuse code from others, without always knowing why.  Noops
should be culled from code as a general rule =).

--david