python - 将元素添加到游戏库存中的堆叠中

Question

我尝试解决这个问题一个半小时以上，但最终还是放弃了。尽我所能，我无法将类似的元素堆叠在库存中。

具体来说，我随机生成一个“drop”，它的名称和数量存储在数组中。 “drops”是一个保存这些子数组的二维数组。我正在尝试在玩家的库存中搜索该掉落物，该掉落物也有一定的数量，当将掉落物添加到其中时，数量会增加......如果它工作正常的话。

import random as rd

inventory = []

items = ["gunk","gear","bolt","wheel","pinion"]
drops = []



while True:
    enter = input("")
    if enter == "":
        drops = []
        quantity = 1
        drops.append([rd.choice(items),quantity])
        print("drops",drops)
        for i in range(len(drops)):
            try:
                add_to = inventory.index(drops[i])
                inventory[add_to][1] += quantity
            except:
                inventory.append(drops[i])


        print("inv",inventory)

输出(反复按回车键):

drops [['pinion', 1]]
inv [['pinion', 1]]
drops [['gunk', 1]]
inv [['pinion', 1], ['gunk', 1]]
drops [['pinion', 1]]
inv [['pinion', 2], ['gunk', 1]]
drops [['bolt', 1]]
inv [['pinion', 2], ['gunk', 1], ['bolt', 1]]
drops [['pinion', 1]]
inv [['pinion', 2], ['gunk', 1], ['bolt', 1], ['pinion', 1]]

如您所见，由于数量与搜索的数量不匹配，因此它只是添加了一个新数量。知道如何解决这个问题吗？

Answer 1

对于这种事情，更好的数据类型是使用 dict 作为库存，因为它可以跟踪给定键(项目)的数量:

import random as rd

inventory = {}

items = ["gunk","gear","bolt","wheel","pinion"]
drops = []



while True:
    enter = input("")
    if enter == "":
        drops = []
        quantity = 1
        drops.append([rd.choice(items),quantity])
        print("drops",drops)

        for drop in drops:
            item = drop[0]
            qty = drop[1]
            if item in inventory:
                    inventory[item] += qty
            else:
                    inventory[item] = qty

        print("inv", [[key, inventory[key]] for key in inventory])

以下是输出示例:

drops, [['gunk', 1]]
inv, [['gunk', 1]]
drops, [['wheel', 1]]
inv, [['wheel', 1], ['gunk', 1]]
drops, [['gunk', 1]]
inv, [['wheel', 1], ['gunk', 2]] 
drops, [['gear', 1]]
inv, [['wheel', 1], ['gunk', 2], ['gear', 1]] 
drops, [['pinion', 1]]
inv, [['wheel', 1], ['pinion', 1], ['gunk', 2], ['gear', 1]] 
drops, [['gunk', 1]]
inv, [['wheel', 1], ['pinion', 1], ['gunk', 3], ['gear', 1]]