如何将输入的数据转换为大写，以便被 while 循环识别？

Question

我正在尝试创建一个程序，只要用户输入的是“是”或某种形式的“是”，就可以继续使用该程序。我已经创建了程序，它可以工作并继续循环，只要他们以大写形式输入 YES。

我尝试修改我的代码，以便在最后询问他们是否要重复时，它接受输入并将其转换为大写我知道您可以在重复位于 [" "," "] 时使用，但是有没有更好的方法来编写代码，以便在最终输入时将输入的数据转换为大写？

我试过了

repeat = input()
repeat = repeat.upper()

但这不起作用。有什么建议吗？

#Import the random function - This only needs to be imported once.
import random

#Use a while loop to allow the user to repeat the process 
repeat = "YES"
while repeat == "YES":

#User is able to input which sided dice they want to throw.    
    dice = input("What side dice do you want to use? 4, 6, or 12?\n")
#4 sided
    if dice == "4":
        #Outputs what sided dice has been chosen and the score thay they rolled.
        print(dice, "sided dice chose.\nYou rolled a", random.randint(1,4))
#6 sided
    elif dice == "6":
        print(dice, "sided dice chose.\nYou rolled a", (random.randint(1,6)))
#12 sided
    elif dice == "12":
        print(dice, "sided dice chose.\nYou rolled a", (random.randint(1,12)))
#Incorrect value entered
    else:
        #Informs the user that the number they have chosen is not a valid option.
        print(dice, "is not a valid choice")
#Asks user if they want to use the program again.
    print("Do you want to use the program again? Yes or No?")
    #Links back to the start of the while loop.
        repeat = input()
        repeat = repeat.upper()

Answer 1

您的问题似乎是缩进。由于 Python 使用缩进来识别代码块，因此正确处理这一点非常重要。

我注意到你的行缩进如下：

    print("Do you want to use the program again? Yes or No?")
    #Links back to the start of the while loop.
        repeat = input()
        repeat = repeat.upper()

请尝试如下缩进它们，它应该可以工作：

    print("Do you want to use the program again? Yes or No?")
#Links back to the start of the while loop.
    repeat = input()
    repeat = repeat.upper()

请看Lines and Indentation section here。

您可能还必须删除while 条件后的空行。 但也许不是。

提示：在使用诸如 Java 等忽略空格的语言时，您不会遇到此类问题。