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 Intersection concept to deal with this kind of problems.

b1 = [1,2,3,4,5,9,11,15]
b2 = [4,5,6,7,8]
set(b1).intersection(b2)
Out[22]: {4, 5}

Best thing about using this code is it works pretty fast for large data also. I have b1 with 607139 and b2 with 296029 elements when i use this logic I get my results in 2.9 seconds.