python - Pythonで入力値をsqlite3に挿入する

Question

プログラムは正常に実行されますが、DB には何も挿入されません。理解できません！

import sqlite3 as db

conn = db.connect('C:\\SQLite\\test.db')
cursor = conn.cursor()

answer = "ok"

while answer != "":

    title = raw_input("Enter film: ")
    year = raw_input("Enter year: ")
    director = raw_input("Enter director: ")

    cursor.execute("insert into films (title, year, director) values (?, ?, ?)", (title, year, director))

    answer = raw_input("Continue?  ")

conn.close()