Python错误“函数未定义”

Question

def shuffledCards():

    CardList = ["AC","AD","AH","AS",
                "KC","KD","KH","KS",
                "JC","JK","JH","JS",
                "QC","QK","QH","QS",
                "2 C", "2 D", "2 H", "2 S",
                "3 C", "3 D", "3 H", "3 S",
                "4 C", "4 D", "4 H", "4 S",
                "5 C", "5 D", "5 H", "5 S",
                "6 C", "6 D", "6 H", "6 S",
                "7 C", "7 D", "7 H", "7 S",
                "8 C", "8 D", "8 H", "8 S",
                "9 C", "9 D", "9 H", "9 S",]

    cardAmount = len(CardList)
    shuffledDeck = []
    for I in range(0,cardAmount):
        randIndex = randint(0,cardAmount - I - 1)
        shuffledDeck.append(CardList[randIndex])
        del CardList [randIndex]
    return shuffledDeck



## At this point we need to draw cards

def drawCard(shuffledDeck):

    if shuffledDeck <= 0:
        shuffledCards()
    else:
        card = shuffledDeck[0]
        del shuffledDeck[0]
    return card     



def main():
    shuffledCards()
    print(shuffledCards())
    drawCard(shuffledDeck)
    print(shuffledCards())
    print (card)


main()

当我运行这个程序时，它会打印出shufflededcards，但是它会给我一个错误，并提示drawCard(shuffledDeck)说shuffledDeck没有定义。在

这是输出：

['8 D', '4 D', 'AS', '8 H', '4 H', '2 S', 'QC', 'QS', '3 D', 'AC', '9 S', 'JS', 'QK', '2 C', '9 H', '5 H', 'JC', '2 D', '6 C', 'KS', '9 D', '9 C', '5 C', 'AH', '2 H', 'AD', '7 D', 'KC', '6 D', 'KD', '3 S', '5 S', '7 H', 'JH', '7 S', '6 H', '7 C', 'JK', '8 S', '6 S', '3 H', '4 S', '4 C', 'QH', '5 D', 'KH', '3 C', '8 C']

Traceback (most recent call last): File "E:\University of Utah\Fall 2015\EAE 1410\Homework\Assignment 5\HW05_Blackjack.py", line 71, in main() File "E:\University of Utah\Fall 2015\EAE 1410\Homework\Assignment 5\HW05_Blackjack.py", line 66, in main drawCard(shuffledDeck) NameError: name 'shuffledDeck' is not defined

Answer 1

函数内部声明的变量是该函数的局部变量（如果您认为它可以作为全局变量使用）。你还了甲板，但不要保存它。我认为“def main（）：”的第一行应该是：

shuffledDeck = shuffledCards()