De-duplicate two lists. List A contains all records. List B contains a subset of List A. Produce a clean list A NOT IN B.

de_duplicate.py

# *-* coding: utf-8 *-*

lst_a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
lst_b = [1, 4, 5, 7, 9, 11, 14]


def de_duplicate(l1, l2):
    """
    Return a de-duplicated list
    :param l1: list splash visitor
    :param l2: list gender visitor
    :return: l3 cleaned list
    """
    l3 = list()
    
    for i in l1:
        if i not in l2:
            l3.append(i)

    return l3


if __name__ == '__main__':
    clean_list = de_duplicate(lst_a, lst_b)
    print(clean_list)