Python delete from mysql

#!/usr/bin/python
 
import MySQLdb
 
# Open database connection
db = MySQLdb.connect("localhost","testuser","test123","TESTDB" )
 
# prepare a cursor object using cursor() method
cursor = db.cursor()
 
# Prepare SQL query to DELETE required records
sql = "DELETE FROM EMPLOYEE WHERE AGE > '%d'" % (20)
try:
   # Execute the SQL command
   cursor.execute(sql)
   # Commit your changes in the database
   db.commit()
except:
   # Rollback in case there is any error
   db.rollback()
 
# disconnect from server
db.close()