如何删除.json文件中所有的“$oid”和"$date“？

import json

def remove_oid_and_date(json_data):
    if isinstance(json_data, dict):
        for key in list(json_data.keys()):
            if key == "$oid" or key == "$date":
                del json_data[key]
            else:
                remove_oid_and_date(json_data[key])
    elif isinstance(json_data, list):
        for item in json_data:
            remove_oid_and_date(item)

# 读取.json文件
with open("data.json", "r") as file:
    json_content = file.read()

# 解析JSON数据
json_data = json.loads(json_content)

# 删除"$oid"和"$date"键值对
remove_oid_and_date(json_data)

# 保存修改后的JSON数据
with open("data.json", "w") as file:
    file.write(json.dumps(json_data, indent=4))