文本类游戏切换房间指令无效，求代码排查与解决方案

核心问题 #

你遇到的"invalid commands"提示，主要来自三个关键问题：

• 大小写不匹配：输入被转成小写，但字典里的方向键（如'go East'）是首字母大写，导致输入的'go east'不在directions列表中
• 方向判断逻辑错误：拆分指令后取的是单独方向词（如'east'），但字典里存储方向的键是完整的'go East'，导致无法匹配到目标地点
• 代码缩进混乱：原代码中while循环、if块的缩进不符合Python语法要求，会直接引发运行报错

修复步骤 #

1. 统一大小写匹配：生成directions列表时同步生成小写版本，用于和用户输入的小写指令匹配
2. 修正方向查找逻辑：通过小写匹配找到对应的原方向键（带正确大小写），直接从当前区域字典中获取目标地点
3. 修复代码缩进：用4个空格作为统一缩进单位，确保所有代码块层级正确

完整修复代码 #

areas_dic = {
    'Home': {'name': 'Home', 'go East': 'Plains', 'item': 'none'},
    'Plains': {'name': 'Plains', 'go North': 'Rocky Terrain', 'go East': 'Fields', 'go South': 'Stream', 'item': 'Grains'},
    'Stream': {'name': 'Stream', 'go East': 'Forest', 'item': 'Water'},
    'Forest': {'name': 'Forest', 'go West': 'Stream', 'item': 'Firewood'},
    'Fields': {'name': 'Fields', 'go West': 'Plains', 'go North': 'Farmlands', 'item': 'Vegetables'},
    'Rocky Terrain': {'name': 'Rocky Terrain', 'go South': 'Plains', 'go East': 'up the Mountain', 'item': 'Medicinal Flowers'},
    'up the Mountain': {'name': 'up the Mountain', 'go West': 'Rocky Terrain', 'go East': 'Mountain Top', 'item': 'Warmer Clothes'},
    'Farmlands': {'name': 'Farmlands', 'go South': 'Fields', 'go West': 'DYSENTERY', 'item': 'Jerky'},
    'Mountain Top': {'name': 'Mountain Top', 'go West': 'up the Mountain', 'go South': 'DYSENTERY', 'item': 'Milk'}
}

print('Welcome to Old Americas')
print('Object of the game is to collect all 7 items before falling ill')
print('You can type go North, go South, go East, go West to move')

current_location = 'Home'
inventory = []

required_items = {'Grains', 'Water', 'Firewood', 'Vegetables', 'Medicinal Flowers', 'Warmer Clothes', 'Milk'}

while True:
    print(f"You are in the {areas_dic[current_location]['name']}.")

    # 生成可用方向列表及小写匹配版本
    directions = [direction for direction in areas_dic[current_location] if direction.startswith('go ')]
    directions_lower = [d.lower() for d in directions]
    print("Available directions:", ", ".join(directions))

    # 获取玩家输入
    command = input("Enter your command: ").strip().lower()

    # 处理指令
    if command in directions_lower:
        # 匹配原方向键并切换地点
        original_dir = directions[directions_lower.index(command)]
        current_location = areas_dic[current_location][original_dir]
        
        # 处理物品收集
        item = areas_dic[current_location].get('item', None)
        if item and item != 'none':
            print(f"You found {item}!")
            inventory.append(item)
            if item in required_items:
                required_items.remove(item)
                if required_items:
                    print(f"Items left to collect: {', '.join(required_items)}")
                else:
                    print("All items collected!")
    else:
        print("Invalid command. Try again.")

    # 检查是否收集全物品
    if not required_items:
        print("Congratulations! You've collected all items. Now face the villain in DYSENTERY!")
        break

    # 检查是否进入最终房间
    if current_location == 'DYSENTERY':
        if not required_items:
            print("You defeated the illness and survived the journey! Well done!")
        else:
            print("You have fallen ill. Game over!")
        break

额外优化说明 #

• 增加item != 'none'判断，避免Home的无效物品被加入背包
• 修正DYSENTERY房间的胜负判断逻辑（原逻辑中背包不会出现'llness'，改为检查物品收集进度）
• 统一代码缩进，确保语法合规

内容的提问来源于stack exchange，提问作者PretTyAnd ScaRy