如何遍历JSON来查找和比较值？

import json

def find_and_compare(json_obj, target_value):
    if isinstance(json_obj, dict):
        for key, value in json_obj.items():
            if value == target_value:
                print("找到匹配值：", value)
            elif isinstance(value, (dict, list)):
                find_and_compare(value, target_value)
    elif isinstance(json_obj, list):
        for item in json_obj:
            find_and_compare(item, target_value)

# 示例JSON对象
json_str = '''
{
    "name": "John",
    "age": 30,
    "city": "New York",
    "pets": [
        {
            "name": "Fluffy",
            "type": "cat"
        },
        {
            "name": "Buddy",
            "type": "dog"
        }
    ]
}
'''

# 将JSON字符串解析为Python对象
json_obj = json.loads(json_str)

# 查找并比较值
find_and_compare(json_obj, "cat")