mongo表更新字段

import pymongo
import time
from concurrent.futures import ThreadPoolExecutor

def id2time(object_id):
    timeStamp = int(object_id[:8], 16)
    return time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(timeStamp)),timeStamp

myclient = pymongo.MongoClient('mongodb://用户名:密码@ip地址:端口/数据库名')
db = myclient['数据库名']
x = db.表名.find()

def Mongo(i):
    createdata,timestamp = id2time(str(i['_id']))
    db.表名.update({"_id":i['_id']}, {"$set": {'createdate': createdata,'timestamp': timestamp}})

with ThreadPoolExecutor(50) as executor:
    for j in x:
        executor.submit(Mongo, j)