Python MySQL update statement does not work -

i try perform simple update statement in python 2.7 won't work @ all. hope can show me mistake:

import mysqldb import datetime  db = mysqldb.connect(host="localhost",    # host, localhost                      user="root",         # username                      passwd="",  # password                      db="******")        # name of data base  cur = db.cursor()  cur.execute("select * data")  row in cur.fetchall():     id_row = str(row[0])     date = str(row[1])     new_date = date[:-2]     new_date += "00"     cur.execute("update data set date={0} id={1}".format(new_date, id_row))  db.close() 

the script should take date unix timestamp database cut off last 2 numbers, replace them 00 , update row in database. code replace numbers works update process not. show no error message , exits code 0.

i have no idea made mistake. can help?

thanks lot!

shame on me!

the error missing db.commit().

thank hints! :)