當我嘗試添加字典鍵和值時如何修復此代碼

Question

我在將嵌套字典從一個移動到另一個的游戲中遇到問題。 到目前為止，這是我的代碼

player_inventory_weapons = {
"0": {"Name ": "Basic sword", "Sharpness": 10, "Fire level": 0, "Poison": 0, "Resistance 
addition": 5, "type": "weapons"}   
}

player_equip_weapons = {   

}

# move item from one dicionary to another

def equip():
    inp = str(input("What item would you want to move over? ")) # input number that is the key of what you are trying to equip
    if inp in player_inventory_weapons:
        del player_equip_weapons  #only one allowed at a time
        player_equip_weapons[inp] = player_inventory_weapons[inp]
        del player_inventory_weapons[inp]
equip()

當我嘗試通過輸入“0”來裝備“基本劍”時，它給了我錯誤“UnboundLocalError: local variable 'player_equip_weapons' referenced before assignment' 我已經嘗試了多種方法，但都沒有奏效！如果可以幫助，將不勝感激。

Answer 1

不要刪除變量，只需使用clear()方法清空字典。

def equip():
    inp = input("What item would you want to move over? ") # input number that is the key of what you are trying to equip
    if inp in player_inventory_weapons:
        player_equip_weapons.clear()  #only one allowed at a time
        player_equip_weapons[inp] = player_inventory_weapons[inp]
        del player_inventory_weapons[inp]

雖然我不確定如果字典一次只能包含一個項目，為什么你會使用它。 只需讓變量保存該項目。

Answer 2

這是您的基本問題：

del player_equip_weapons  # This line deletes the variable
player_equip_weapons[inp] = player_inventory_weapons[inp]  # This line tries to access a variable that doesn't exist

因為您正在刪除該變量，所以您訪問它的嘗試將失敗。

請注意，您幾乎從不想使用del或全局變量。 相反，請執行以下操作：

def equip(inventory: dict):
    inp = input("What item would you want to move over? ")
    item = inventory.pop(inp, None)
    if item is not None:
        return {
            "hand": inventory.get(inp, "Nothing")
        }
    else:
        print("No such item in your inventory!")
        return dict()

player_equipped_weapons = equip(player_inventory_weapons)

這會用您的裝備功能的結果覆蓋裝備的武器變量。 通過這種方式，您無需擔心清除原始字典。 而不是使用del您可以使用pop()從庫存數據中刪除該項目，然后您可以檢查該項目是否確實存在於那里。