如何反转此json

import json

def reverse_json(json_str):
    # 将JSON字符串解析为Python对象
    data = json.loads(json_str)
    
    # 反转JSON对象的键值对
    reversed_data = {v: k for k, v in data.items()}
    
    # 将反转后的JSON对象转换为字符串
    reversed_json = json.dumps(reversed_data)
    
    return reversed_json

# 示例JSON字符串
json_str = '{"name": "John", "age": 30, "city": "New York"}'

# 调用函数反转JSON
reversed_json = reverse_json(json_str)

print(reversed_json)

{"John": "name", "30": "age", "New York": "city"}