课堂文本冒险游戏Inventory系统报错求助：unhashable错误解决

问题概述 #

开发基于文本的冒险游戏时，添加Inventory系统后出现unhashable错误。尝试用tuple解决但无法动态添加物品，需修复该问题并保留列表作为Inventory的可变特性。

错误原因分析 #

1. 返回值赋值错误：player_commands函数返回(current_room, inventory)元组，但调用时仅赋值给current_room，导致current_room变为元组类型。后续访问castle_rooms[current_room]时，元组虽可哈希但不存在于字典中，引发错误且破坏房间状态正确性。
2. 物品判断逻辑错误：get命令中if direction in current_room是检查物品名是否包含在房间名字符串中，而非判断当前房间是否存在该物品，逻辑完全错误。

修复步骤 #

• 修正返回值赋值：调用player_commands时同时接收current_room和inventory两个返回值，保持current_room为字符串类型。
• 重构物品获取逻辑：判断当前房间的Item字段是否等于目标物品，且该物品未被收集，满足条件才添加到Inventory并给出对应提示。
• 补充错误提示：处理物品已收集、房间无该物品的情况，给玩家明确反馈。

修正后的完整代码 #

def player_instructions():
    # main menu and game commands
    print('Move Commands: go North, go South, go West, go East')
    print("Add to inventory: get 'item name'.")
    print('-' * 50)


print('A Paladin Adventure Game.')  # game opening greeting
print('Collect 7 items to win the game,')
print('or be destroyed by the Vampire Lord.')
print('-' * 50)

# dictionary for rooms and movement between
castle_rooms = {'Entry Hall': {'East': 'Great Hall', 'South': 'Solar', 'Item': ''},
                'Great Hall': {'West': 'Entry Hall', 'South': 'Boudoir',
                               'North': 'Kitchen', 'East': 'Cabinet', 'Item': 'Silver Mail'},
                'Solar': {'North': 'Entry Hall', 'East': 'Boudoir', 'Item': 'Stake'},
                'Boudoir': {'North': 'Great Hall', 'West': 'Solar', 'Item': 'Holy Water'},
                'Kitchen': {'East': 'Larder', 'South': 'Great Hall', 'Item': 'Mallet'},
                'Larder': {'West': 'Kitchen', 'Item': 'Potion of Cleansing'},
                'Cabinet': {'West': 'Great Hall', 'North': 'Garderobe', 'South': 'Bedchamber',
                            'Item': 'Blessed Sword'},
                'Garderobe': {'South': 'Cabinet', 'Item': 'Torch'}
                }

current_room = 'Entry Hall'  # define starting room
inventory = []  # define list for inventory


def player_commands(command, direction):  # function for moving rooms and managing inventory
    global current_room
    global inventory
    if command == 'go':
        if direction in castle_rooms[current_room]:
            current_room = castle_rooms[current_room][direction]
        else:
            print("You can't go that way")
    elif command == 'get':
        room_item = castle_rooms[current_room]['Item']
        if room_item == direction and room_item not in inventory:
            inventory.append(direction)
            print(f'You have collected {direction}!')
        elif room_item in inventory:
            print('You already have this item.')
        else:
            print('That item is not in this room.')
    else:
        print('Invalid command')
    return current_room, inventory


while current_room != 'Bedchamber':  # while loop for gameplay
    player_instructions()
    print(f'You are in the {current_room}.')
    print(f'Inventory: {inventory}')  # Show current inventory

    room_item = castle_rooms[current_room]['Item']
    if room_item and room_item not in inventory:
        print(f'You see {room_item} in the room.')
    
    user_input = input('What will you do next? ').split()
    command = user_input[0] if len(user_input) > 0 else ''
    direction = user_input[1] if len(user_input) > 1 else ''
    current_room, inventory = player_commands(command, direction)

额外优化说明 #

• 添加Inventory实时显示，让玩家清楚当前收集的物品。
• 处理空物品房间（如Entry Hall）的提示逻辑，避免显示空字符串。
• 优化输入处理，防止用户输入空内容导致索引错误。

内容的提问来源于stack exchange，提问作者Daelinia