在房间之间移动

Question

我的代码如下：

rooms = {
    'Great Hall': {'South': 'Bedroom'},
    'Bedroom': {'North': 'Great Hall', 'East': 'Cellar'},
    'Cellar': {'West': 'Bedroom'}
}

def show_instructions():
    print('The instructions are as follows: go north, go south, go east, go west')

def move_rooms(direction, room='Great Hall'):
    if direction == 'go south':
        room = 'Bedroom'
        return rooms[room]['South']
    elif direction == 'go north':
        if room == 'Great Hall' or 'Cellar':
            return 'Invalid direction please try again.'
        return rooms[room]['North']
    elif direction == 'go east':
        if room == 'Great Hall' or 'Cellar':
            return 'Invalid direction please try again.'
        return rooms[room]['East']
    elif direction == 'go west':
        if room == 'Bedroom' or 'Great Hall':
            return 'Invalid direction please try again.'
        return rooms[room]['West']





currentRoom = 'Great Hall'
gameInstructions = 'The instructions are as follows: go north, go south, go east, go west'
print(gameInstructions)
print(currentRoom)

userDirection = ''
while userDirection != 'exit':
    userDirection = input("Pick a direction, or type exit to exit the game.")
    if currentRoom == 'Great Hall':
        if userDirection == 'go south':
            currentRoom = move_rooms(userDirection, currentRoom)
            show_instructions()
            print(currentRoom)
    else:
        print('Invalid direction. Please pick another direction.')
        print(currentRoom)
        show_instructions()
elif currentRoom == 'Bedroom':
    if userDirection != 'go north' or 'go east':
        print('Invalid direction. Please pick another direction.')
        print(currentRoom)
        show_instructions()
    elif userDirection == 'go north':
        currentRoom = move_rooms(userDirection, currentRoom)
        print(currentRoom)
        show_instructions()
    elif userDirection == 'go east':
        currentRoom = move_rooms(userDirection, currentRoom)
        print(currentRoom)
        show_instructions()
elif 'Cellar' == currentRoom:
    if userDirection != 'go west':
        print('Invalid direction. Please pick another direction.')
        print(currentRoom)
        show_instructions()
    else:
        currentRoom = move_rooms(userDirection, currentRoom)
        print(currentRoom)
        show_instructions()
else:
    if userDirection == 'exit':
        print('Thanks for playing the game!')
        break

这是一个大型文本游戏的一小部分，我应该在大学课堂上开发它。该程序的目标是让用户输入在房间之间移动。我使用了给定的模板字典，并试图限制指令列表的输入，但单词“exit”除外。所以我遇到的主要问题是如何在我创建的函数中正确使用返回函数以产生正确的结果。 每次我尝试输入向南作为第一个方向时，它都会在控制台中给我一个“南”的“KeyError”。任何帮助将不胜感激。

Answer 1

好吧，要回答您为什么会看到 KeyError 的主要问题，是因为您尝试访问的键对于“卧室”的嵌套字典值不存在。查看您为该密钥制作的 k-v 对。

您必须这样做才能返回“南”键的值：

 if direction == 'go south':
    room = 'Greathall'
    return rooms[room]['South']

 >>> 'Bedroom'

这里只是一个提示：为什么不在字典值提取中直接调用房间，而不是将房间定义为“大厅”，您可以这样做：

 return rooms['Greathall']['South']

这会给你同样的反应。