# 交集
def list_intersection(list1: list, list2: list) -> list:
    return list(set(list1).intersection(set(list2)))


# 并集
def list_union(list1: list, list2: list) -> list:
    return list(set(list1).union(set(list2)))


# 差集(在in_list中，但是不在not_in_list中)
def list_difference(in_list: list, not_in_list: list) -> list:
    return list(set(in_list).difference(set(not_in_list)))


if __name__ == '__main__':
    list_1 = ['a', 'b', 'c', 1, 2, 3]
    list_2 = [1, 2, 3, 4, 5, 6]
    print("交集：", list_intersection(list_1, list_2))
    print('并集：', list_union(list_1, list_2))
    print('差集(在list_1中，但不在list_2中)：', list_difference(list_1, list_2))