python - 使用嵌套循环时索引 i 超出数组范围

Question

开始学习编码，我正在用 python 自动化无聊的东西来做幻想项目练习。我尝试将 addedItems 数组的每个项目与字典键进行比较，看看它们是否存在，如果不存在，我会创建一个默认值为 1 的新键。但是它说我有索引超出范围错误，尽管为循环并测试它似乎可以毫无问题地迭代的数组，我错过了什么？

`

def displayInventory(inventory):
  print("Inventory: ")
  item_total = 0
  for k, v in inventory.items():
    item_total += v
    print(v, k)
  print("Total number of items: " + str(item_total))

def addToInventory(inventory, addedItems):
  items = []
  amount = []
  print(addedItems)
  for keys, values in inventory.items():
    items.append(keys)
    amount.append(values)

  for i in range(len(addedItems)):
    for j in range(len(inventory)):
     if addedItems[i] == items[i]:
      inventory[items[j]] =+ 1
     else:
        inventory.setdefault(addedItems[i], 1)

inv = {'gold coin': 42, 'rope': 1}
dragonLoot = ['gold coin', 'dagger', 'gold coin', 'gold coin', 'ruby']
inv = addToInventory(inv, dragonLoot)
displayInventory(inv)

`这是错误信息

['gold coin', 'dagger', 'gold coin', 'gold coin', 'ruby']

---------------------------------------------------------------------------

IndexError                                Traceback (most recent call last)

<ipython-input-54-b83d92c005f4> in <module>
     26 inv = {'gold coin': 42, 'rope': 1}
     27 dragonLoot = ['gold coin', 'dagger', 'gold coin', 'gold coin', 'ruby']
---> 28 inv = addToInventory(inv, dragonLoot)
     29 displayInventory(inv)

<ipython-input-54-b83d92c005f4> in addToInventory(inventory, addedItems)
     19   for i in range(len(addedItems)):
     20     for j in range(len(inventory)):
---> 21      if addedItems[i] == items[i]:
     22       inventory[items[j]] =+ 1
     23      else:

IndexError: list index out of range

我尝试在常规 for 循环中测试索引 i，它毫无问题地遍历了项目，我不确定为什么它说超出范围。

编辑:已解决!非常感谢!!!

Answer 1

def displayInventory(inventory):
    item_total = 0
    for k, v in inventory.items():
        item_total += int(v)
        print(v, k)
    print("Total number of items: " + str(item_total))

def addToInventory(inventory, addedItems):
    items = []
    amount = []
    print(addedItems)
    for keys, values in inventory.items():
        items.append(keys)
        amount.append(values)
    for i in range(len(inventory)):
        for j in range(len(addedItems)):
            if addedItems[j] == items[i]:
                inventory[items[i]] += 1
            else:
                inventory.setdefault(addedItems[i], 1)
    return inventory

inv = {'gold coin': 42, 'rope': 1}
dragonLoot = ['gold coin', 'dagger', 'gold coin', 'gold coin', 'ruby']
inv = addToInventory(inv, dragonLoot)
displayInventory(inv)