IT-140课程项目II：文本游戏无法添加物品至Inventory求助

我在开发IT-140课程的文本游戏项目，用Python字典搭建游戏场景，目前能正常实现房间移动，但没办法把物品添加到背包（Inventory）里。现有代码如下：

rooms = {
    'Parking lot': {'South': 'Main entrance', 'North': 'dragon'},
    'Main entrance': {'North': 'Parking lot', 'South': 'Check in area', 'item': 'red star'},
    'Check in area': {'North': 'Main entrance', 'South': 'Main hallway', 'item': 'blue star'},
    'Main hallway': {'North': 'Check in area', 'South': 'Security area', 'item': 'green star'},
    'Security area': {'North': 'Main hallway', 'South': 'Gates hallway', 'item': 'yellow star'},
    'Gates hallway': {'North': 'Security area', 'West': 'Waiting area A', 'East': 'Waiting area B',
                      'item': 'orange star'},
    'Waiting area A': {'East': 'Gates hallway', 'item': 'purple star'},
    'Waiting area B': {'West': 'Gates hallway ', 'item': 'pink star'}
}


def welcome():
    print("Welcome to Magic Stars!!")
    print("There is a Dragon threatening to destroy your city, currently is in the airport.")
    print("you need to collect the 7 magic stars that are spread around the abandoned airport.")
    print("are you ready to start this adventure?")
    print('----------------------------------------')


welcome()

inventory = []

directions = ['north', 'south', 'east', 'west', 'exit', 'take']

current_room = 'Main entrance'

while True:
    print("You are in  {}".format(current_room))
    print('Your current inventory: {}'.format(inventory))
    print('In this room you see the  {}'.format(rooms[current_room]['item']))
    command = input("Enter command:").split()[-1].capitalize()
    print('-----------------------------')

    if command == 'Exit':
        current_room = 'Exit'
        print("Thanks for Playing!!")
        break

    elif command in rooms[current_room]:
        current_room = rooms[current_room][command]
        # invalid move
    else:
        print("Invalid move")

问题分析 #

1. 命令解析错误：原代码用split()[-1].capitalize()获取命令，输入take red star会得到Star，无法识别take指令。
2. 缺少物品拾取逻辑：没有处理take命令的代码分支，无法将物品加入背包。
3. 无物品房间报错：Parking lot等房间没有item键，执行rooms[current_room]['item']会触发KeyError。
4. 房间路径错误：Waiting area B的West指向'Gates hallway '（末尾多空格），导致无法正常移动到该房间。

修改后的代码 #

rooms = {
    'Parking lot': {'South': 'Main entrance', 'North': 'dragon'},
    'Main entrance': {'North': 'Parking lot', 'South': 'Check in area', 'item': 'red star'},
    'Check in area': {'North': 'Main entrance', 'South': 'Main hallway', 'item': 'blue star'},
    'Main hallway': {'North': 'Check in area', 'South': 'Security area', 'item': 'green star'},
    'Security area': {'North': 'Main hallway', 'South': 'Gates hallway', 'item': 'yellow star'},
    'Gates hallway': {'North': 'Security area', 'West': 'Waiting area A', 'East': 'Waiting area B',
                      'item': 'orange star'},
    'Waiting area A': {'East': 'Gates hallway', 'item': 'purple star'},
    'Waiting area B': {'West': 'Gates hallway', 'item': 'pink star'}  # 修复末尾空格问题
}


def welcome():
    print("Welcome to Magic Stars!!")
    print("There is a Dragon threatening to destroy your city, currently is in the airport.")
    print("you need to collect the 7 magic stars that are spread around the abandoned airport.")
    print("are you ready to start this adventure?")
    print('----------------------------------------')


welcome()

inventory = []

valid_commands = ['north', 'south', 'east', 'west', 'exit', 'take']

current_room = 'Main entrance'

while True:
    print(f"You are in {current_room}")
    print(f'Your current inventory: {inventory}')
    # 处理无物品的房间
    if 'item' in rooms[current_room]:
        print(f'In this room you see the {rooms[current_room]["item"]}')
    else:
        print('This room has no items to collect.')
    
    # 正确解析命令：取输入的第一个单词转为小写
    user_input = input("Enter command (e.g., 'north', 'take red star'): ").strip().lower()
    if not user_input:
        print("Please enter a valid command.")
        print('-----------------------------')
        continue
    command_parts = user_input.split()
    command = command_parts[0]
    print('-----------------------------')

    if command == 'exit':
        print("Thanks for Playing!!")
        break

    elif command == 'take':
        # 检查当前房间是否有物品
        if 'item' not in rooms[current_room]:
            print("There's nothing to take here!")
            continue
        item = rooms[current_room]['item']
        # 检查物品是否已在背包
        if item in inventory:
            print(f"You already have the {item}!")
        else:
            inventory.append(item)
            print(f"You took the {item}!")
            # 从房间移除物品，避免重复拾取
            del rooms[current_room]['item']
    
    elif command in ['north', 'south', 'east', 'west']:
        # 检查方向是否有效
        if command.capitalize() in rooms[current_room]:
            current_room = rooms[current_room][command.capitalize()]
        else:
            print("Invalid move! That direction doesn't lead anywhere.")
    
    else:
        print("Invalid command! Try directions (north/south/east/west), 'take [item]', or 'exit'.")

修改说明 #

• 修复了Waiting area B的路径空格问题，确保移动正常。
• 调整命令解析逻辑，取输入的第一个单词作为命令，支持take [item]格式的指令。
• 添加take命令处理分支：检查房间物品、背包状态，完成拾取后移除房间内的物品。
• 增加无物品房间的判断，避免KeyError。
• 优化提示信息，让玩家更清楚可用命令。

内容的提问来源于stack exchange，提问作者J Merino