如果连接断开，如何强制pymongo重新连接，并进行操作？

import pymongo

client = pymongo.MongoClient("mongodb://localhost:27017/")

db = client["mydatabase"]
collection = db["mycollection"]

# 插入文档
document = {"name": "John", "age": 30}
collection.insert_one(document)

# 查询文档
result = collection.find({"name": "John"})

# 更新文档
collection.update_one({"name": "John"}, {"$set": {"age": 35}})

# 删除文档
collection.delete_one({"name": "John"})

if not client.is_connected():
    client.close()
    client = pymongo.MongoClient("mongodb://localhost:27017/")
    db = client["mydatabase"]
    collection = db["mycollection"]