inserting timestamp in mysql table in python

bid, best_bid_quantity are floats, target_date is set as timestamp in my db.

get timestamp

target_date_time_ms = (k.lastRestRequestTimestamp) 

base_datetime = datetime.datetime( 1970, 1, 1 )

delta = datetime.timedelta( 0, 0, 0, target_date_time_ms )

target_date = base_datetime + delta

timestamp = target_date

db = MySQLdb.connect(host="localhost",    # your host, usually localhost
                         user="root",         # your username
                         passwd="lolilol",  # your password
                         db="test")        # name of the data base

cur = db.cursor()

try:

   cur.execute("""INSERT INTO test1 (heure, prix, quantite) VALUES ({},{},{})""".format(target_date, bid, best_bid_quantity))
   db.commit()

except:
    print('did not insert')
    db.rollback()

db.close()

error --> it goes to except when I add the target_date