如何使用镜头重命名JSON对象中的键？

import json

def rename_key(json_obj, old_key, new_key):
    if old_key in json_obj:
        json_obj[new_key] = json_obj.pop(old_key)

    for value in json_obj.values():
        if isinstance(value, dict):
            rename_key(value, old_key, new_key)
        elif isinstance(value, list):
            for item in value:
                if isinstance(item, dict):
                    rename_key(item, old_key, new_key)

    return json_obj

# 示例JSON对象
json_str = '''
{
    "name": "John",
    "age": 30,
    "address": {
        "street": "123 Main St",
        "city": "New York"
    },
    "friends": [
        {
            "name": "Alice",
            "age": 28
        },
        {
            "name": "Bob",
            "age": 32
        }
    ]
}
'''

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

# 重命名键名
json_obj = rename_key(json_obj, "name", "full_name")

# 将修改后的JSON对象转换回JSON字符串
modified_json_str = json.dumps(json_obj, indent=4)

print(modified_json_str)