如何正确地制作带有花边链接的链表？

class Node:
    def __init__(self, data):
        self.data = data
        self.next = None
        self.prev = None

class DoublyLinkedList:
    def __init__(self):
        self.head = None
        self.tail = None

    def append(self, data):
        new_node = Node(data)
        if not self.head:
            self.head = new_node
            self.tail = new_node
        else:
            new_node.prev = self.tail
            self.tail.next = new_node
            self.tail = new_node

    def prepend(self, data):
        new_node = Node(data)
        if not self.head:
            self.head = new_node
            self.tail = new_node
        else:
            new_node.next = self.head
            self.head.prev = new_node
            self.head = new_node

    def display(self):
        current = self.head
        while current:
            print(f"Node({current.data})", end=" <-> ")
            current = current.next
        print("None")

# 创建一个双链表并添加元素
dll = DoublyLinkedList()
dll.append(1)
dll.append(2)
dll.append(3)
dll.prepend(0)

# 显示链表
dll.display()