python subtract list from list

1# Example usage using list comprehension:
2list_a = [1, 2, 3]
3list_b = [1, 1, 1]
4[a_i - b_i for a_i, b_i in zip(list_a, list_b)]
5--> [0, 1, 2]

1>>> z = list(set(x) - set(y))
2>>> z
3[0, 8, 2, 4, 6]

1[item for item in x if item not in y]
2