intersection, union, difference, symmetric difference for dictionaries

Tue Feb 25 18:07:28 EST 2014

On 2014年02月25日 21:27, Ben Finney wrote:
> Peter Otten <__peter__ at web.de> writes:
>>> mauro wrote:
>>>> > - Dictionaries and sets are both accessed by key
>>>> but sets have no values
>> Or rather, sets *only* have values. Dictionaries have keys, sets do not
> have keys.
>But a dictionary can have duplicate values, a set cannot.