[Python-3000] Iterators for dict keys, values, and items == annoying :)

[Aahz]

On Fri, Mar 24, 2006, Greg Ewing wrote:
>
> I've speculated that perhaps it should be illegal to
> use an iterator that way, and you would instead have
> to say
> 
>    for x from iterator:
> 
> This would force people to keep the distinction firmly
> in mind and might lead to less confusion.

How would you distinguish?  What about objects that are their own
iterator (such as files)?
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