python操作SqlServer

import pymssql

class 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‘))