Question

我正在尝试创建一个接受输入的程序，并将任何输入转换为例如Yes / YES，以便在下面的while循环中接受小写。我试过这样做，但没有工作。有什么想法吗？

#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()

Answer 1

您的代码永远不会进入while循环，因为您将repeat设置为“YES”，然后立即检查它是否为“是”，而不是。

Answer 2

我会以另一种方式解决这个问题

while True:
    dice = input(....)
    #etc
    repeat = ''
    while repeat.lower() not in ['yes', 'no']:
        repeat = input('Do you want to use the program again? (yes/no)?')
    if repeat.lower() == 'no':
        break

这会要求用户输入是或否，并继续询问，直到提供是或否。

Answer 3

丹尼尔是完全正确的。代码开头的'YES'格式应为'yes'，因为'YES 'yes'不等于while，因此{{1}}循环不会运行所有

将输入转换为小写以在while循环中接受

3 个答案: