Python：while 循環不循環

Question

我目前正在創建一張來自 python 的卡片，並在創建我的 draft() function 用於起草玩家的牌組時，我的 while 循環遇到了問題。

我似乎無法弄清楚為什么 while 循環不循環。

如果有人能弄清楚為什么，請告訴我。

player_deck = []

#draft function to draft a player deck should be used when starting game
def draft():
    while len(player_deck) < 10:
        random_variable = random.random()
        if random_variable < 0.2:
            print("Your choise is between Drake and Recovery")
            print("--->   " + drake.description)
            print("--->   " + recovery.description)
            player_choice = input("Which do you choose: ")
            if player_choice.lower() == "drake":
                player_deck.append(drake)
            if player_choice.lower() == "recovery":
                player_deck.append(recovery)
            else:
                return "Please pick one of the two"
        if random_variable >= 0.2 and random_variable <= 0.999999:
            print("Your choise is between Blast Cone and Eminem")
            print("--->   " + blast_cone.description)
            print("--->   " + eminem.description)
            player_choice = input("Which do you choose: ")
            if player_choice.lower() == "blast cone":
                player_deck.append(blast_cone)
            if player_choice.lower() == "eminem":
                player_deck.append(eminem)
            else:
                return "Please pick one of the two"
        return player_deck

print(draft())

Answer 1

while循環不會重復，因為最后一個return在它有機會重復之前退出循環：

def draft():
    while len(player_deck) < 10:
        # bla
        # bla 
        return player_deck

print(draft())

我假設您希望以不同的方式縮進return ，也許

def draft():
    while len(player_deck) < 10:
        # bla
        # bla 
    return player_deck

print(draft())

Answer 2

您的return語句在他的 while 循環內。 只要 python 擊中它，function 就會結束。 它應該移到while循環之外。 這是代碼：

player_deck = []

#draft function to draft a player deck should be used when starting game
def draft():
    while len(player_deck) < 10:
        random_variable = random.random()
        if random_variable < 0.2:
            print("Your choise is between Drake and Recovery")
            print("--->   " + drake.description)
            print("--->   " + recovery.description)
            player_choice = input("Which do you choose: ")
            if player_choice.lower() == "drake":
                player_deck.append(drake)
            if player_choice.lower() == "recovery":
                player_deck.append(recovery)
            else:
                return "Please pick one of the two"
        if random_variable >= 0.2 and random_variable <= 0.999999:
            print("Your choise is between Blast Cone and Eminem")
            print("--->   " + blast_cone.description)
            print("--->   " + eminem.description)
            player_choice = input("Which do you choose: ")
            if player_choice.lower() == "blast cone":
                player_deck.append(blast_cone)
            if player_choice.lower() == "eminem":
                player_deck.append(eminem)
            else:
                return "Please pick one of the two"
    return player_deck