Dealing with multiple sets

[John Henry]

Oops.  Forgot to mention, I am still using 2.3.


John Henry wrote:
> Hi list,
>
> If I have a bunch of sets:
>
> a = set((1, 2, 3))
> b = set((2, 3))
> c = set((1, 3))
> ....
>
> What's the cleanest way to say:
>
> 1) Give me a list of the items that are in all of the sets? (3 in the
> above example)
> 2) Give me a list of the items that are not in all of the sets? (1,2 in
> the above example)
> 
> Thanks,