如何创建已有json的树

import json

# 解析 JSON 数据
json_data = '''
{
  "name": "root",
  "children": [
    {
      "name": "node1",
      "children": [
        {
          "name": "leaf1"
        },
        {
          "name": "leaf2"
        }
      ]
    },
    {
      "name": "node2",
      "children": [
        {
          "name": "leaf3"
        },
        {
          "name": "leaf4"
        }
      ]
    }
  ]
}
'''

data = json.loads(json_data)

# 定义节点类
class Node:
    def __init__(self, value):
        self.value = value
        self.children = []

# 创建树的节点
def create_tree(data):
    node = Node(data["name"])
    if "children" in data:
        for child_data in data["children"]:
            child_node = create_tree(child_data)
            node.children.append(child_node)
    return node

# 构建树结构
tree = create_tree(data)

# 遍历树
def traverse_tree(node):
    print(node.value)
    for child in node.children:
        traverse_tree(child)

traverse_tree(tree)