Question

def initDeck(n):
    cards = []  
    for i in range(n):
        cards.append(i + 1)
    return cards

def cutDeck(deck):
    decklength = len(deck)
    if((decklength % 2) != 0): #odds
        numTop = decklength//2
        numBot = numTop + 1
    else: #evens
        numTop = decklength//2
        numBot = decklength//2

    bottomDeck = []
    bottomDeck = deck[:(numBot)]

    topDeck = []
    topDeck = deck[(numBot):]

    return topDeck, bottomDeck

def shuffle(topDeck, bottomDeck):
    newDeck = []
    numcards = (len(topDeck)) + (len(bottomDeck))
    for g in range(numcards):
        newDeck.append(bottomDeck[g])
        newDeck.append(topDeck[g])

    return newDeck

#--------MAIN--------
n = int(input("How many cards do you want to shuffle? "))
numshuffles = int(input("How many times would you like to shuffle the deck? "))

deck = initDeck(n)

topDeck,bottomDeck = cutDeck(deck)

print(bottomDeck, '\n', topDeck, sep="")

while(numshuffles > 0):
    shuffledDeck = shuffle(topDeck, bottomDeck)
    numshuffles += -1
    print(shuffledDeck)

该程序需要你想要多少张牌，你想要洗牌多少次，然后轻轻地洗牌。问题是当我尝试运行它时，它需要我的两个输入，然后输出两个错误。

Traceback (most recent call last):
  File "C:\etc", line 51, in <module>
    shuffledDeck = shuffle(topDeck, bottomDeck)
  File "C:\etc", line 35, in shuffle
    newDeck.append(bottomDeck[g])
IndexError: list index out of range

我不完全确定错误是什么，因为它看起来很好并且对我有意义。任何帮助将非常感谢，因为这将在上午8点到期！

Answer 1

numcards = (len(topDeck)) + (len(bottomDeck))
    for g in range(numcards):
        newDeck.append(bottomDeck[g])

你的g达到topDeck和bottomDeck的长度之和，因此变得大于len（bottomDeck）。

Answer 2

在

numcards = (len(topDeck)) + (len(bottomDeck))
for g in range(numcards):
    newDeck.append(bottomDeck[g])
    newDeck.append(topDeck[g])

您要将bottomDeck[g]和topDeck[g]追加到newDeck和g，范围从0到len(bottomDeck) + len (topDeck)。表示某点g变得大于len(topDeck)或len(bottomDeck)。

修改你可以像这样解决它。

for g in range(len(topDeck)): newDeck.append(bottomDeck[g]) newDeck.append(topDeck[g]) # if total cards are odd, one card will be left in bottomDeck if(len(topDeck) != len(bottomDeck)): newDeck.append(bottomDeck[-1])

你也应该在洗牌后再次切割牌组

while(numshuffles > 0): shuffledDeck = shuffle(topDeck, bottomDeck) numshuffles += -1 print(shuffledDeck) topDeck,bottomDeck = cutDeck(shuffledDeck)

Python3：列表索引超出范围

2 个答案: