如何验证和删除JSON对象的嵌套节点

import json

def validate_nested_node(json_obj):
    if isinstance(json_obj, dict):
        for key, value in json_obj.items():
            if isinstance(value, dict) or isinstance(value, list):
                return True
    elif isinstance(json_obj, list):
        for item in json_obj:
            if isinstance(item, dict) or isinstance(item, list):
                return True
    return False

def remove_nested_node(json_obj):
    if isinstance(json_obj, dict):
        for key, value in list(json_obj.items()):
            if isinstance(value, dict) or isinstance(value, list):
                del json_obj[key]
            else:
                remove_nested_node(value)
    elif isinstance(json_obj, list):
        for item in json_obj:
            remove_nested_node(item)

# 示例JSON对象
json_str = '''
{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Street",
    "city": "New York"
  },
  "hobbies": ["reading", "music"],
  "friends": [
    {
      "name": "Alice",
      "age": 28
    },
    {
      "name": "Bob",
      "age": 32,
      "address": {
        "street": "456 Street",
        "city": "San Francisco"
      }
    }
  ]
}
'''

# 解析JSON对象
json_obj = json.loads(json_str)

# 验证嵌套节点
has_nested_node = validate_nested_node(json_obj)
print("JSON对象是否存在嵌套节点：", has_nested_node)

# 删除嵌套节点
remove_nested_node(json_obj)

# 输出处理后的JSON对象
print("处理后的JSON对象：", json.dumps(json_obj, indent=2))