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Question

我正在开发一个 Blackjack 程序，除了我的 PlayAgain() 功能外，一切正常。在这个函数中，我应该重置我的变量，但是当我这样做时，变量会变成深蓝色，当悬停在上面时，它说“变量”没有被访问。当运行程序并尝试再次播放时，变量仍保留以前的值。我是 python 的新手，所以我不知道如何处理这个问题，如果有帮助就好了。

这是我的完整代码：

import random

deck = [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]*4
dealer = []
hand = []
random.shuffle(deck)

def DealDealer(deck):
    while len(dealer) < 2:
        card = deck.pop()
        if card == 11:card = "J"
        if card == 12:card = "Q"
        if card == 13:card = "K"
        if card == 14:card = "A"
        dealer.append(card)
    return dealer

def DealPlayer(deck):
    while len(hand) < 2:
        card = deck.pop()
        if card == 11:card = "J"
        if card == 12:card = "Q"
        if card == 13:card = "K"
        if card == 14:card = "A"
        hand.append(card)
    return hand

def PlayAgain():
    again = input("\nDo you want to play again? (Y/N) : ").lower()
    if again == "y":
        Game()
        deck = [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]*4
        dealer = []
        hand = []
        random.shuffle(deck)
    else:
        print("Bye!")
        exit()

def Hit():
    card = deck.pop()
    if card == 11:card = "J"
    if card == 12:card = "Q"
    if card == 13:card = "K"
    if card == 14:card = "A"
    hand.append(card)
    return hand

def DealerHit():
    card = deck.pop()
    if card == 11:card = "J"
    if card == 12:card = "Q"
    if card == 13:card = "K"
    if card == 14:card = "A"
    dealer.append(card)
    return dealer

def HandTotal(hand):
    total = 0
    for card in hand:
        if(card == "J" or card == "Q" or card == "K"):
            total+= 10
        elif(card == "A"):
            if(total >= 11):
                total+= 1
            else: 
                total+= 11
        else:
            total += card
    return total

def DealerTotal(dealer):
    total = 0
    for card in dealer:
        if(card == "J" or card == "Q" or card == "K"):
            total+= 10
        elif(card == "A"):
            if(total >= 11):
                total+= 1
            else: 
                total+= 11
        else:
            total += card
    return total

def DealersRetribution():
    while(DealerTotal(dealer) < HandTotal(hand)):
        DealerHit()
        print("Dealer's Hand: ", dealer)

        if(DealerTotal(dealer) > 21):
            print("\Dealer Busted! You Win!\nYour Score: ", HandTotal(hand), "\nDealer's Score: ", DealerTotal(dealer))
            PlayAgain()
    
def Score():
    if(HandTotal(hand) == DealerTotal(dealer)):
        print("\nTie! I'll getcha next time!\nYour Score: ", HandTotal(hand), "\nDealer's Score: ", DealerTotal(dealer))
    elif(HandTotal(hand) > DealerTotal(dealer)):
        print("What?! You Won?! How?! U Just got lucky.\nYour Score: ", HandTotal(hand), "\nDealer's Score: ", DealerTotal(dealer))
    else:
        print("\nYou Lose!\nYour Score: ", HandTotal(hand), "\nDealer's Score: ", DealerTotal(dealer))

def NormalAction():
    action = input("\nHit - press 1\nStand - press 2\nDouble Down - press 3\n> ")
    if(action == "1"):
        Hit()
        print("\nDealer's Hand: ", dealer)
        print("Your Hand: ", hand)
        if(HandTotal(hand) > 21):
            print("\nYou Busted!\nYour Score: ", HandTotal(hand), "\nDealer's Score: ", DealerTotal(dealer))
            PlayAgain()
        else:
            NormalAction()
    elif(action == "2"):
        print()
        DealersRetribution()
        print("\nDealer's Hand: ", dealer)
        print("Your Hand: ", hand)
        Score()
    elif(action == "3"):
        Hit()
        print("\nDealer's Hand: ", dealer)
        print("Your Hand: ", hand)
        DealersRetribution()
        print("\nDealer's Hand: ", dealer)
        print("Your Hand: ", hand)
        Score()
    else:
        print("\nPlease enter a correct action (1/2)!")
        NormalAction()

def Game():
    play = input("\nWELCOME TO BLACKJACK!\nPlay - press 1\nQuit - press 2\n> ")
    if(play == "2"):
        print("\nBye, Have a nice day!")
        exit()
    elif(play == "1"):
        DealDealer(deck)
        DealPlayer(deck)
        print("\nDealer's Hand: ", dealer[0], "X")
        print("Your Hand: ", hand)
        NormalAction()
        PlayAgain()
    else:
        print("\nPlease enter a correct action (1/2)!")
        Game()

Game()

提前致谢。

ps：我一直在尝试让拆分（二十一点拆分，而不是编程拆分）工作，但不知道如何去做。我最初以为我可以在数组中创建一个数组，但很快意识到这会导致各种问题。对此提供帮助也很好，但错误是目前的主要问题

编辑：询问我在何处定义变量的请求。我在程序的最顶部定义了它们。 here

Answer 1

问题是在 play again 函数中打乱了值，但在 Game() 函数中没有打乱。

你可能应该做的是：

def PlayAgain():
    again = input("\nDo you want to play again? (Y/N) : ").lower()
    if again == "y":
         Game()
    else:
         print("Bye!")
         exit()

并在 Game() 函数的开头实现这部分：

def Game():       
        deck = [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]*4
        dealer = []
        hand = []
        random.shuffle(deck)
        #rest_of_your_code

如果这不起作用，您还应该分享您的 Game() 函数；）

Answer 2

那是因为 vs-code 将该代码检测为 deadcode，不会在程序中使用。从下面的例子中会更清楚：

def abc():
 a= input('enter first number')
 b = input('enter second number')
 return a;
alpha  = abc();
print(a)

在上面的示例中，b 从未使用过，因此它被 vs-code 检测为 deadcode。所以 vs 代码将这些语句引用为 不可访问。但是代码仍然会被执行。

在你的例子中，dealer 没有在程序中使用，所以 vs-code 发现它是 deadcode

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