python - 无法重复我的代码中要求的内容

Question

我正在使用 Python 3.4.3 创建一个基于文本的冒险游戏，但我不知道如何让代码重复一个问题。在此之前有一堆旁白，如果这有助于理解正在发生的事情的话。

print("\n\n\n\n\nYou awake to find yourself in the center of a clearing in a forest.")
print("You stand up and decide to take a look around.")

str = input("Which direction do you steer your head? d= down, l= left, r= right, u= up, b= behind you: ")
print(" ")
if str in ("d"):
    print("You see your combat boots and the grassy ground below your feet. ")

if str in ("l"):
    print("The forest trees grow thicker and darker that way. You stare into the shadows and feel... cold...")

if str in ("r"):
    print("The forest is warm and inviting that way, you think you can hear a distant birds chirp.")

if str in ("u"):
    print("The blue sky looks gorgeous, a crow flies overhead... that's not a crow...")
    print("It's a Nevermore, an aerial Grim. You stand still until it passes.")

if str in ("b"):
    print("the grass slowly grows to dirt as the area falls into a mountain cliff. You now know where you are.")
    print("Mount Glenn, one of the most Grim-infested places in all of Remnant.")
    print("It's a bit unsettling.")

else:
    print("Try that again")

我希望代码向用户重复问题，直到他们回答了所有可能的答案并继续下一个问题。我还希望它在他们得到其他答案时重复这个问题。我该怎么做呢？

Answer 1

不要使用 str 作为变量名，它会隐藏一个重要的内置函数并导致奇怪的问题。

使用 while 循环将输出限制为有效选项。

valid_choices = ('d', 'l', 'r', 'u', 'b',)

choice = None
while choice not in valid_choices:
    text = input("Which direction do you steer your head? d= down, l= left, r= right, u= up, b= behind you: ")
    choice = text.strip()

if choice == 'd':
    print ('...')
elif choice == 'u':
    print ('...')

另见:

• string.strip
• tuples
• None