sets and subsets

[Amy G]

There you go... list comprehension.  That is definatly nicer to look at.


"Elaine Jackson" <elainejackson7355 at home.com> wrote in message
news:zcxWb.464065$JQ1.270296 at pd7tw1no...
> b=[x for x in b if x not in c]
>
> "Bart Nessux" <bart_nessux at hotmail.com> wrote in message
> news:c0e4g3$r1$1 at solaris.cc.vt.edu...
> | By using lists, I can create sets of number. Suppose I have three lists.
> | One list is the super-set, one is a set that contains all the numbers
> | (just like the super-set) and the last is sub-set of the super-set. For
> | example:
> |
> | a = [1,2,3,4,5] # The super-set.
> | b = [1,2,3,4,5] # Looks just like the super-set, but it's not.
> | c = [2,4] # A sub-set
> |
> | I'd like to remove 2 & 4 from set b BECAUSE they are present in set c...
> | this would make the sets look like this:
> |
> | a = [1,2,3,4,5]
> | b = [1,3,5]
> | c = [2,4]
> |
> | How do I test set c to find what it contains and then look at set b to
> | see if it contains any of those same numbers, and if so, remove them.
> |
>
>