Python：期望缩进块错误

Question

当我运行我的二十一点游戏程序时，python空闲3.4.2出现了一条错误消息，＆＃34;期望一个缩进的块＆＃34;。

def end(player):
    if player == 1:
        print('You win, well done')
    elif player == 0:
        print('Computer won, game over')
    print("Computer's cards:")
    deal(computer_suit1,computer_card1)
    deal(computer_suit2,computer_card2)
    startup()