CodeForce QtSql 6

def insert(db):
    query = QtSql.QSqlQuery()
    query.prepare("INSERT INTO developers ( first_name, last_name) "
                  "VALUES (:forename, :surname)")
    query.bindValue(":forename", "Bart")
    query.bindValue(":surname", "Simpson")
    try:
        query.exec_()
        db.commit()
    except:
        # Rollback in case there is any error
        db.rollback()
    last_id = query.lastInsertId()
    print last_id