无效方向输入的协助

Question

当用户输入无效的方向时，只需要一些关于打印一行的指导。我曾尝试在代码的几个不同部分使用if-move-not-in-rooms[position]，但似乎无法正常运行。我觉得盯着我看是件很愚蠢的事，但唉，我还在学习。但基本上，当用户输入除北、南、东、西或出口以外的内容时，这是一个打印行的问题。

此外，如果还有更好的方法来编写代码，我会接受批评。谢谢你们！

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

position = "Great Hall"
move = ""

while True:
    print("You are currently in ", position)
    move = input("\nEnter direction: North, South, East, West, or Exit to finish\n").capitalize()
    if move != "Exit":
        if move in rooms[position]:
            position = rooms[position][move]
            print("You entered", position)
        else:
            print("You see a wall. Try another direction")
    else:
        print("You left the area.")
        break

Answer 1

您可以在不嵌套的情况下逐个执行检查。

def start(rooms, position):
    while True:
        print("You are currently in ", position)
        available_moves = rooms[position].keys()  # Getting possible moves.
        move = input(f"\nEnter direction: {', '.join(available_moves)} or Exit to finish\n").capitalize()

        if move == "Exit":  # Fail fast.
            print("You left the area.")
            break
        
        if not move in available_moves:
            # It's not important whether it's one of the directions or
            # just some gibberish.
            # We can't move there, no matter what.
            print('This move isn\'t possible, choose one of the suggested moves.')


if __name__ == '__main__':
    start({
        "Great Hall": {
            "South": "Bedroom"
        },
        "Bedroom": {
            "North": "Great Hall",
            "East": "Cellar"
        },
        "Cellar": {
            "West": "Bedroom"
        },
    },
    'Great Hall')

Answer 2

为了检查输入是否有效，将move变量与有效值列表进行比较，并输出一条自定义消息（见下文）。

还玩了另一件事：因为这是一个基于文本的游戏，另一个想法可能是使用某种提示符，比如输出。下面输入字符串中的每个字符，延迟0,025秒，创建一个漂亮的效果。此外，下面的示例在每次迭代后重置屏幕输出，以便保持整洁，不会与文本杂乱。

# Standard library
import os, time, sys


def prompter(message: str, add_dots=False, end="\n") -> None:
    for i, char in enumerate(message):
        print(char, end="", flush=True)
        time.sleep(0.025)
    if add_dots:
        for i in range(0,5):
            print(".", end="", flush=True)
            time.sleep(0.4)
    print(end=end)


def clear() -> None:
    if os.name == "nt":
        os.system("cls")
    else:
        os.system("clear")


def main(rooms: [], position: str) -> None:
    valid_inputs = ["North", "South", "East", "West", "Exit"]
    while True:
        clear()
        print("Valid inputs: " + ", ".join(valid_inputs))
        prompter("You are currently in " + position)
        prompter("Enter direction: ", end="")
        move = input().capitalize()
        if move not in valid_inputs:
            prompter("Incorrect input. Try again", True)
        elif move != "Exit":
            if move in rooms[position]:
                position = rooms[position][move]
                prompter("You entered " + position, True)
            else:
                prompter("You see a wall. Try another direction", True)
        else:
            print("You left the area.")
            break


if __name__ == "__main__":
    rooms = {
        "Great Hall": {
            "South": "Bedroom"
            },
        "Bedroom": {
            "North": "Great Hall",
            "East": "Cellar"
            },
        "Cellar": {
            "West": "Bedroom"
            },
        }
    start_position = "Great Hall"
    main(rooms, start_position)

Answer 3

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

validInputs = ['North', 'South', 'East', 'West', 'Exit']
position = "Great Hall"
move = ""

while True:
    print("You are currently in ", position)
    move = input("\nEnter direction: North, South, East, West, or Exit to finish\n").capitalize()
    
    if move not in validInputs:
        print('invalid input, please try again')
    elif move != "Exit":
        if move in rooms[position]:
            position = rooms[position][move]
            print("You entered", position)
        else:
            print("You see a wall. Try another direction")
    else:
        print("You left the area.")
        break

我希望这就是你想要的：）