Compute list difference
list, python
Solution
If the order does not matter, you can simply calculate the set difference:
>>> set([1,2,3,4]) - set([2,5])
set([1, 4, 3])
>>> set([2,5]) - set([1,2,3,4])
set([5])
Problem
In Python, what is the best way to compute the difference between two lists? example ``` A = [1,2,3,4] B = [2,5] A - B = [1,3,4] B - A = [5] ```