class Node: def __init__(self, data): self.data = data self.prev = None self.next = None
# 作业:双链表节点的创建(尾插法) def creat_double_tail_listlink(lis): #传进来一个列表参数 head = Node(0) ayue = head for i in lis: node = Node(i) ayue.next = node node.prev = ayue ayue = node head = head.next return head
link = creat_double_tail_listlink([1,2,3,4])
print(link.next.prev.data)