覆盖文本对象和无限循环

Question

我无法获得新的总数来代替之前的总数，它只是将其打印在上面。同样，如果有人可以帮助我解释为什么我的发牌人无限循环。

这是我的代码的一部分，一旦到达while真实语句，它就会弄乱。

def main():

    # card deck and shuffle it
    win = GraphWin('Blackjack', 800, 600)
    deck = CardDeck()
    deck.shuffle()

    # hit me button
    hitp = Point(650, 125)
    hitButton = Text(hitp, "Hit me")
    hitButton.draw(win)
    hitbox = Rectangle(Point(600, 100), (Point(700, 150)))
    hitbox.draw(win)

    # player's starting hand
    card = deck.dealOne()
    value, filename = cardInfo(card)
    drawCard(filename, 100, 100, win)
    playerTotal = value
    card = deck.dealOne()
    value, filename = cardInfo(card)
    drawCard(filename, 200, 100, win)
    playerTotal = playerTotal + value
    # display total
    hand_total = Text(Point(100, 200), playerTotal)
    hand_total.draw(win)


    # dealer's starting hand
    card = deck.dealOne()
    value, filename = cardInfo(card)
    drawCard(filename, 100, 300, win)
    dealerTotal = value
    # display total
    dhand_total = Text(Point(100, 400), dealerTotal)
    dhand_total.draw(win)


    while True:
        pt = win.getMouse()
        x = pt.getX()
        y = pt.getY()
        if 600 < x < 700 and 100 < y < 150:
            value, filename = cardInfo(card)
            drawCard(filename, 300, 100, win)
            playerTotal = playerTotal + value
            hand_total = Text(Point(100, 200), playerTotal)
            hand_total.draw(win)
            if playerTotal > 21:
                break
        else:
            break
    if playerTotal <= 21:
        while dealerTotal < 17:
            card = deck.dealOne()
            value, filename = cardInfo(card)
            drawCard(filename, 200, 300, win)
            dealerTotal2 = value
            dhand_total = Text(Point(100, 400), dealerTotal2)
            dhand_total.draw(win)
            if dealerTotal >= 21:
                break

    # wait for mouse click before closing window
    win.getMouse()
    win.close()

这是一个二十一点游戏，应该在玩家破产或发牌人获得17分或以上时就打破。

Answer 1

由于您没有提供足够的代码来运行您的程序，所以我只能提出未经测试的建议。您的问题似乎是此代码：

hand_total = Text(Point(100, 200), playerTotal)
hand_total.draw(win)

以及与经销商对应的dhand_total代码。您每次通过循环都会创建一个新的文本对象，而不会删除旧的对象。快速而肮脏的修复程序可能正在添加以下行：

hand_total.undraw()
hand_total = Text(Point(100, 200), playerTotal)
hand_total.draw(win)

但是更好的方法是将两行替换为更改当前Text实例的文本而无需创建新行：

hand_total.setText(playerTotal)