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msyql的同步和异步代码封装

pymongo操作删除数据（多条）#!/usr/bin/python3import pymongofrom pymongo import MongoClientconn = MongoClient('42.194.138.112', 27017)# db = conn['Publish']db = conn['WenShu']db.authenticate(name='mongodb', password='ipalpha807')mycol = db['ChinaWenShu6']#

PYMSQL操作指南一.安装pip3 install PyMySQL二.连接查询数据库import pymysql# 连接数据库conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='root', db='mydb', charset='utf8')print(conn)# 创建游标cursor = conn.cursor()# sql语句,已知数据库存在student表sql = 's