ميزات البرنامج · تشابه جاكارد للمجموعات

def jaccard(left, right):
    left, right = tuple(left), tuple(right)
    if len(left) > 1000 or len(right) > 1000:
        raise ValueError("collection.limit")
    if any(type(v) is not int for v in left + right):
        raise ValueError("member.integer")
    left, right = set(left), set(right)
    union = left | right
    return len(left & right) / len(union) if union else 1.0