Find non-common elements in lists

Question

I\'m trying to write a piece of code that can automatically factor an expression. For example, if I have two lists [1,2,3,4] and [2,3,5], the code should be able to find th

Answer 1

You can use the .__xor__ attribute method.

set([1,2,3,4]).__xor__(set([2,3,5]))

or

a = set([1,2,3,4])
b = set([2,3,5])
a.__xor__(b)