如何避免在pymongo中插入null？

import pymongo

# 连接MongoDB数据库
client = pymongo.MongoClient("mongodb://localhost:27017/")
db = client["mydatabase"]
collection = db["mycollection"]

# 定义要插入的数据
data = {
    "name": "John",
    "age": None,  # None代表null
    "email": "john@example.com"
}

# 遍历数据，判断字段值是否为None，如果不是则插入该字段
filtered_data = {k: v for k, v in data.items() if v is not None}

# 插入数据
collection.insert_one(filtered_data)