python - “int”对象不可迭代

Question

我一直在尝试使用函数获取将其值从字符串更改为 int 的列表的总和

player_hand = [] 

def card_type(player_hand):
 card_value = 0
 if player_hand[0] == 'A':
     card_value = 11
 if player_hand[0] == 'J':
     card_value = 10
 if player_hand[0] == 'Q':
     card_value = 10
 if player_hand[0] == 'K':
     card_value = 10

 if player_hand[0] == '2':
     card_value = 2
 if player_hand[0] == '3':
     card_value = 3
 if player_hand[0] == '4':
     card_value = 4
 if player_hand[0] == '5':
     card_value = 5
 if player_hand[0] == '6':
     card_value = 6
 if player_hand[0] == '7':
     card_value = 7
 if player_hand[0] == '8':
     card_value = 8
 if player_hand[0] == '9':
     card_value = 9
 if player_hand[0] == '1':
     card_value = 10

def player_hit(card_deck):
 rando = random.randint(0,len(card_deck)-1)
 player_hand.append(card_deck[rando])
 card_deck.remove(card_deck[rando])

然后尝试使用

找到玩家列表的总和

card_total = 0

print('Player was handed:')
for i in range(2):
    print(player_hit(card_deck))

for i in len(player_hand)-1:
    print('\n',sum(card_type(player_hand[i])))

但是我得到一个错误

for i in len(player_hand)-1:
TypeError: 'int' object is not iterable

我不明白问题出在哪里，因为我已经获取了值并将它们转换为 int，并检查了列表索引范围。请帮忙

Answer 1

len(player_hand) - 1 只是一个整数，但您编写的代码会尝试对其进行循环。您需要一个可迭代对象来执行 for 循环。试试这个:

 for i in range(len(player_hand)):
     # do your thing here

另一种方法是直接迭代 player_hand，因为它是可迭代的，就像这样:

 for card in player_hand:
     print('\n', card_type(card))