如何在python中遍历json树？

import json

# 假设我们有以下JSON数据
json_data = '''
{
    "name": "root",
    "children": [
        {
            "name": "child1",
            "children": []
        },
        {
            "name": "child2",
            "children": [
                {
                    "name": "grandchild",
                    "children": []
                }
            ]
        }
    ]
}
'''

# 将JSON字符串转换为Python对象
data = json.loads(json_data)

def traverse_json_tree(node, level=0):
    """
    递归遍历JSON树结构
    :param node: 当前节点
    :param level: 当前层级
    """
    # 打印当前节点的信息和层级
    print("  " * level + node.get('name', ''))
    
    # 如果有children键，遍历它的值（可能是一个列表）
    children = node.get('children')
    if isinstance(children, list):
        for child in children:
            traverse_json_tree(child, level + 1)

# 开始遍历
traverse_json_tree(data)

def traverse_json_tree(node, level=0):
    try:
        print("  " * level + node.get('name', ''))
        children = node.get('children')
        if isinstance(children, list):
            for child in children:
                traverse_json_tree(child, level + 1)
    except Exception as e:
        print(f"Error at level {level}: {e}")