python操作sqlserver需要使用pymssql模块

import pymssqlclass Mysql():    def __init__(self,host,user,pwd,db):        self.host = host        self.user = user        self.pwd = pwd        self.db = db    def connectDB(self):        if not self.db:            raise(NameError,"没有设置数据库信息")        self.conn = pymssql.connect(host=self.host,user=self.user,password=self.pwd,database=self.db,charset="utf8")        cur = self.conn.cursor()        if not cur:            raise(NameError,"连接数据库失败")        else:            return cur    def ExecQuery(self,sql):        '''        查询数据库        :param sql:         :return:         '''        cur = self.connectDB()        cur.execute(sql)        res = cur.fetchall()        self.conn.close()        return res    def ExecNonQuery(self,sql):        '''        非查询操作        :param sql:         :return:         '''        cur = self.connectDB()        cur.execute(sql)        self.conn.commit()        self.conn.close()ms = Mysql(host="127.0.0.1",user="lary",pwd="lary123",db="testdb")res = ms.ExecQuery("select * from users")for i in res:    print(i)sql="update users set name='%s' where id=1"%u'测试'print(sql)ms.ExecNonQuery(sql.encode('utf-8'))