在此while循环中，我如何不接受'Yes'或'No'以外的字符串值

Posted 2023-01-07

我对编程非常陌生，所以请原谅这个愚蠢的问题。我如何进行此循环，以便如果此人输入随机字符串（不是“是”或“否”），它将返回“无效响应”？

name = input("What's your name? ")
understanding = input(", do you understand while loops in python\n(Yes or No)? ".format(name))


while understanding.lower() != 'yes':
    print("Ok, , while loops in Python repeat as long as a certain Boolean condition is met.".format(name))
    understanding = input(", now do you understand Python while loops?\n(Yes or No)? ".format(name))
print("Great news ! It's good to hear that you understand these loops now! Let's move on!".format(name))

答案

也许像这样

if understanding.lower() not in ('yes','no'):
    print('Invalid response')