Get unique items in list1 that are not in list2
    :return: Unique items only in list 1

def unique(list1, list2):
    """
    Get unique items in list1 that are not in list2
    :return: Unique items only in list 1
    """
    set2 = set(list2)
    list1_unique = [x for x in tqdm(list1, desc='Unique', total=len(list1)) if x not in set2]
    return list1_unique