Get the difference between two list?

Question

I have to lists of numbers, I want to save the difference between each parallel cells I need something like this:

diffEx = [(myEx - opEx) for myEx,opEx in (myExeptPack,opExeptPack)]

eg.

listA = [1,2,3]
listB = [4,3,2]
diff = [-3,-1,1]

Thank you

Answer 1

Use zip function:

diffEx = [(myEx - opEx) for myEx,opEx in zip(myExeptPack,opExeptPack)]

Answer 2

You could use map to make the statement more concise than when using zip:

import operator
diffEx = map(operator.sub, myExeptPack, opExeptPack)