在Python 3.9.x中，如何过滤JSON文件并挑选出相关的键？

import json

def filter_json(json_data, keys):
    filtered_data = [{key: json_data[key]} for key in keys if key in json_data]
    return filtered_data

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

# 挑选出相关的键
keys_to_filter = ['key1', 'key2', 'key3']
filtered_json = filter_json(json_data, keys_to_filter)

# 打印过滤后的JSON数据
print(json.dumps(filtered_json, indent=4))