Python文本游戏输入有效方向却同时输出True和False的解决方法

我正在开发一款文本游戏，但发现即使玩家输入有效的移动方向，代码中的'True'和'false'语句都会被打印出来。我尝试在for循环前将用户输入capitalize，但仍然无法解决问题，陷入了困境。

原代码如下：

# A dictionary for the simplified dragon text game
# The dictionary links a room to other rooms.
rooms = {
        'Great Hall': {'South': 'Bedroom'},
        'Bedroom': {'North': 'Great Hall', 'East': 'Cellar'},
        'Cellar': {'West': 'Bedroom'}
    }

exit_game = False
current_area = 'Great Hall'
movement = ['North', 'East', 'South', 'West', 'Exit']
direction = ''  # player direction will be defined by player input
print('Movement: North, East, South, West, or Exit.')
print('-' * 50)
while direction != 'exit' and direction != 'Exit':
    # prints available direction
    # print(*rooms[current_area].keys())
    # prints available room
    # print(*rooms[current_area].values())
    # prints both
    # print('To your ', *rooms[current_area].keys(),' is the ', *rooms[current_area].values(), '.', sep='')
    # ---------------------------------------------
    print('Your are in the: ', current_area, '.', sep='')
    print('To your ', *rooms[current_area].keys(), ' is the ', *rooms[current_area].values(), '.', sep='')
    direction = input('Which way do you want to move?')
    print('You entered:', direction)
    direction = direction.capitalize()
    for value in rooms.values():
        if direction in value:
            print('True')
        elif direction not in value:
            print('false')
            break
    print('-' * 50)

问题原因 #

核心问题出在遍历所有房间方向字典的for value in rooms.values()循环：

• 这个循环会检查所有房间的可用方向，而不是仅当前所在房间的
• 比如在Great Hall输入South时，第一次循环检测到Great Hall的字典包含South，打印True；但第二次循环会检查Bedroom的字典，里面没有South，就会触发elif打印false并终止循环，导致两种结果都被输出
• 同时原代码没有处理房间移动逻辑和Exit指令的退出逻辑，功能不完整

解决方案 #

直接去掉无用的全局循环，只检查当前房间的可用方向，同时补充完整的游戏逻辑：

修正后的代码：

# A dictionary for the simplified dragon text game
# The dictionary links a room to other rooms.
rooms = {
        'Great Hall': {'South': 'Bedroom'},
        'Bedroom': {'North': 'Great Hall', 'East': 'Cellar'},
        'Cellar': {'West': 'Bedroom'}
    }

current_area = 'Great Hall'
movement = ['North', 'East', 'South', 'West', 'Exit']
print('Movement: North, East, South, West, or Exit.')
print('-' * 50)

while True:
    print('You are in the: ', current_area, '.', sep='')
    # 格式化打印当前房间的可用方向与对应房间
    for dir_name, room_name in rooms[current_area].items():
        print(f'To your {dir_name} is the {room_name}.')
    
    direction = input('Which way do you want to move? ')
    print('You entered:', direction)
    direction = direction.capitalize()
    
    if direction == 'Exit':
        print('Exiting game...')
        break
    elif direction in rooms[current_area]:
        # 更新当前所在房间
        current_area = rooms[current_area][direction]
        print('Valid move!')
    else:
        print('Invalid direction, try again.')
    
    print('-' * 50)

关键修正点 #

1. 移除遍历所有房间的循环，仅检查rooms[current_area]（当前房间的方向字典）
2. 补充Exit指令处理，输入Exit直接退出游戏
3. 有效方向时更新当前房间位置，给出明确提示
4. 无效方向时输出错误提示，避免混淆
5. 优化可用方向的打印格式，每个方向对应一行，可读性更强

内容的提问来源于stack exchange，提问作者Prince L