如何从同一级别的json文件中查找并获取值？

import json

def find_value(json_data, target_key):
    if isinstance(json_data, dict):
        for key, value in json_data.items():
            if key == target_key:
                return value
            elif isinstance(value, (dict, list)):
                result = find_value(value, target_key)
                if result is not None:
                    return result
    elif isinstance(json_data, list):
        for item in json_data:
            result = find_value(item, target_key)
            if result is not None:
                return result

    return None

# 读取JSON文件
with open('data.json') as file:
    json_data = json.load(file)

# 查找并获取值
target_key = 'key_name'
result = find_value(json_data, target_key)

if result is not None:
    print(f"The value of '{target_key}' is: {result}")
else:
    print(f"The key '{target_key}' does not exist in the JSON file.")