如果不使用mongoengine (python)，如何更新存在和插入

import pymongo

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

# 更新单个文档
query = { "name": "John" }
new_values = { "$set": { "age": 30 } }
collection.update_one(query, new_values)

# 更新多个文档
query = { "name": { "$regex": "^J" } }
new_values = { "$inc": { "age": 1 } }
collection.update_many(query, new_values)

import pymongo

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

# 插入单个文档
document = { "name": "John", "age": 25 }
collection.insert_one(document)

# 插入多个文档
documents = [
  { "name": "Alice", "age": 30 },
  { "name": "Bob", "age": 35 },
  { "name": "Charlie", "age": 40 }
]
collection.insert_many(documents)