[Python-3000] Warning about future-unsafe usage patterns in Python 2.x e.g. dict.keys().sort()

[Edward C. Jones]

Brian Quinlan said:
> It is my understanding that, in Python 3000, certain functions and 
> methods that currently return lists will return some sort of view type 
> (e.g. dict.values()) or an iterator (e.g. zip). So certain usage 
> patterns will no longer be supported e.g. d.keys().sort().

I use this idiom fairly often:

d = dict()
...
thekeys = d.keys()
thekeys.sort()
for key in thekeys:
     ...

What should I use in Python 3.0?