包含合并字典的 if 语句会导致 \'TypeError: \'int\' object is not callable

Answer 1

您正在尝试调用quantity，这是一个带有preciousMinerals 的int：

if str(quantity(preciousMinerals)) == 0: 我建议您跟踪您在代码中使用的类型。每种类型都有自己的能力，有些不能做，有些可以。

这对你来说很好：

stuff = {'arrows': 41, 'sword': 1, 'dagger': 2, 'torch': 1}
precious_minerals = {'rubies': 1, 'emeralds': 0, 'sapphires': 0}
stuff_and_minerals = stuff|precious_minerals

def display_inventory(inventory):
    total_items = 0
    for item, quantity in inventory.items():
        print(f"You have {quantity} {item}")
        total_items += quantity

    print(f"You have a total of {total_items} items in your bag.")

    if sum(precious_minerals.values()) == 0:
        print('You have no precious minerals.')
    elif sum(precious_minerals.values()) > 0:
        print('You have some precious minerals in your bag.')
        for item, quantity in precious_minerals.items():
            print(f"You have {quantity} {item}")

display_inventory(stuff_and_minerals)

Answer 2

这是似乎有效的代码，我希望这是您所要求的：

#!/usr/bin/env python3

stuff = {'arrows': 41, 'sword': 1, 'dagger': 2, 'torch': 1}
preciousMinerals = {'rubies': 0, 'emeralds': 2, 'sapphires': 1}
stuffAndMinerals = stuff|preciousMinerals

def displayInventory(inventory):
    total_items = 0
    for item, quantity in inventory.items():
        print(str(quantity) + ' ' + item)
        total_items += quantity
    print('You have a total of ' + str(total_items) + ' items in your bag.')

    if sum(preciousMinerals.values()) == 0: # get the content of preciousMinerals, will look like dict_values[0, 2, 1] in this case
                                            # won't tell anything about dict_valuesm see more here (recommended): https://stackoverflow.com/questions/33674033/python-how-to-convert-a-dictionary-into-a-subscriptable-array
        print('You have no precious minerals.')
    elif sum(preciousMinerals.values()) > 0:
        print('You have some precious minerals in your bag.')
        nrOfAllPreciousMinerals = list(preciousMinerals.values()) # remember: list(dict_values[0, 2, 1]) => removes the dict_values, see the link above

        # count the number of minerals greater than 0
        nrOfYourPreciousMinerals = 0
        for mineral in nrOfAllPreciousMinerals:
            if mineral > 0:
                nrOfYourPreciousMinerals += 1


        print("You have: ", end="") # end="" removes the newline
        i = 0
        for item in preciousMinerals:
            if preciousMinerals[item] != 0:
                print(item, end="")
                if nrOfYourPreciousMinerals > i+1: # +1 because enumerate() starts counting at zero
                    print(",", end=" ") # end=SomeString defines what shall be printed if the whole print() is done - in this case it's a space
                else:
                    print(".")

                i += 1





displayInventory(stuffAndMinerals)

cmets 可能会澄清我的所作所为。我不知道你想做什么以及为什么这样做。

如果您有任何问题，请发表评论。

Answer 3

首先，我认为您将传递给函数的 inventory 变量与在函数外部声明的变量 preciousMinerals 混合在一起。

此外，您正在尝试在其范围之外使用 quantity（这是 for 循环），并像调用它一样调用它，如果它是一个函数，而它是一个数字。

让我尝试通过参考实现来帮助您，希望事情会变得更加清晰：

# keep a list of known items and their categories
catalog = {
  'boring items': {'arrows', 'sword', 'dagger', 'torch'},
  'precious minerals': {'rubies', 'emeralds', 'sapphires'}
}

def displayInventory(inventory):
  if not any(inventory.values()):
    print('You do not have anything, get out!')
    return
  remaining = set(inventory.keys())
  for category, cat_items in catalog.items():
    matching = {itm: inventory[itm] for itm in (remaining & cat_items)}
    if not any(matching.values()):
      print(f'You have no {category}.')
      continue
    print(f'These are all the {category} you have:')
    print(*(f'  {k} {v}' for k, v in matching.items()), sep=',\n')
    print(f'  You have a total of {sum(matching.values())} {category} in your bag.')
    remaining.difference_update(cat_items)
  if any(remaining):
    matching = {itm: inventory[itm] for itm in remaining}
    print('You have some unknown items:')
    print(*(f'  {k} {v}' for k, v in matching.items()), sep=',\n')


displayInventory({'arrows': 41, 'sword': 1, 'dagger': 2, 'torch': 1})
displayInventory({'rubies': 0, 'emeralds': 0, 'sapphires': 0})
displayInventory({'rubies': 4, 'torch': 7, 'dagger': 0, 'cheese': 4})