intersection, union, difference, symmetric difference for dictionaries

[Nick Timkovich]

On Tue, Feb 25, 2014 at 2:32 PM, mauro <mauro at gmail.com> wrote:
>
> So I wonder why operations such us intersection, union, difference,
> symmetric difference that are available for sets and are not available
> for dictionaries without going via key dictviews.

How would the set operations apply to the dictionary values?