python链表输出值转josn

可以使用Python内置的json模块将链表的值转换为json格式。具体实现步骤如下：

1. 定义一个链表类和节点类。

class ListNode:
    def __init__(self, val=0, next=None):
        self.val = val
        self.next = next

class LinkedList:
    def __init__(self):
        self.head = None

2. 创建一个链表，并添加一些节点。

linkedList = LinkedList()
linkedList.head = ListNode(1)
secondNode = ListNode(2)
thirdNode = ListNode(3)
linkedList.head.next = secondNode
secondNode.next = thirdNode

3. 将链表的值转换为字典类型。

currentNode = linkedList.head
data = {}
index = 0
while currentNode:
    data[index] = currentNode.val
    index += 1
    currentNode = currentNode.next

4. 使用json模块将字典转换为json格式。

import json
json_data = json.dumps(data)
print(json_data)

完整代码如下：

import json

class ListNode:
    def __init__(self, val=0, next=None):
        self.val = val
        self.next = next

class LinkedList:
    def __init__(self):
        self.head = None

linkedList = LinkedList()
linkedList.head = ListNode(1)
secondNode = ListNode(2)
thirdNode = ListNode(3)
linkedList.head.next = secondNode
secondNode.next = thirdNode

currentNode = linkedList.head
data = {}
index = 0
while currentNode:
    data[index] = currentNode.val
    index += 1
    currentNode = currentNode.next

json_data = json.dumps(data)
print(json_data)

输出结果为：

{"0": 1, "1": 2, "2": 3}