Write jaccard(a, b) = size of intersection ÷ size of union of the two lists' unique values, rounded to 3 decimals (0 if both are empty).
jaccard(['sql', 'python'], ['python', 'excel']) → 0.333
jaccard([], []) → 0
Submit runs 4 tests, including hidden edge cases.
Each hint gives a little more help. Try on your own first.
Run your code to see the output here.