Question

inventory = {
    'gold' : 500, 
    'sack' : ['rock', 'copper wire'],
    'weapons rack' : ['pistol', 'MP-5', 'grenade'],
    'ammo pouch' : ['Pistol ammo', 'MP-5 ammo'],
}

print "You have " + inventory['gold'][0] + " coins!"

我收到错误消息：

  line 8, in <module>
    print "You have " + inventory['gold'] + " coins!"
TypeError: 'int' object has no attribute '__getitem__'

为什么控制台不打印"You have 500 gold coins!"

Answer 1

您的gold条目不是列表;您正在尝试索引500整数。删除[0]：

print "You have", inventory['gold'], "coins!"

请注意，我使用的是逗号，而不是+，因为您不能只连接字符串和整数。另一种方法是首先将整数转换为字符串：

print "You have " + str(inventory['gold']) + " coins!"

您还可以将黄金值放入列表中：

inventory = {
    'gold' : [500], 
    'sack' : ['rock', 'copper wire'],
    'weapons rack' : ['pistol', 'MP-5', 'grenade'],
    'ammo pouch' : ['Pistol ammo', 'MP-5 ammo'],
}

请注意[...]值周围的500方括号。然后，您的[0]再次适用：

print "You have", inventory['gold'][0], "coins!"

在Python中编码，print命令没有按预期运行

1 个答案: