def get_domain():

    exist_domain = []
    existe_domain_temp = ()
    check_domain_list_temp = ()
    check_domain_list = []

    db = Database()
    existe_domain_temp = db.existed_white_domain()
    if existe_domain_temp:
        exist_domain = [i[0] for i in existe_domain_temp]

    check_domain_list_temp = db.get_check_domain()
    if check_domain_list_temp:
        check_domain_list = [i[0] for i in check_domain_list_temp]
    db.close_db()
    # print len(list(set(domain_list).difference(set(exist_domain))))
    return list(set(exist_domain).difference(set(check_domain_list)))