pythonスクリプトmysqlデータベースの削除変更操作

# -*- coding: utf-8 -*-   
#mysqldb  
import time, MySQLdb  
#    
conn=MySQLdb.connect(host="localhost",user="root",passwd="",db="test",charset="utf8") 
cursor = conn.cursor()  
#    
sql = "insert into user(name,created) values(%s,%s)" 
param = ("aaa",int(time.time()))  
n = cursor.execute(sql,param)  
print n  
#    
sql = "update user set name=%s where id=3" 
param = ("bbb")  
n = cursor.execute(sql,param)  
print n  
#    
n = cursor.execute("select * from user")  
for row in cursor.fetchall():  
  for r in row:  
    print r  
#    
sql = "delete from user where name=%s" 
param =("aaa")  
n = cursor.execute(sql,param)  
print n  
cursor.close()  
#    
conn.close()