Question

Possible Duplicate:
Python, compute list difference

I have two lists
For example:

A = [1,3,5,7]
B = [1,2,3,4,5,6,7,8]

Now, A is always a subset of B
I want to generate a third list C:
which has elements which are present in B but absent in A
like

C = [2,4..]

Thanks

Answer 1

C = sorted(list(set(B) - set(A)))

That should do it.