Question

我的代码存在问题，我也无法找到解决方案。我问的问题必须是有效的，但循环只是继续，让我输入。

print('Do you want to go to the store or woods?')

lists = ('woods', 'store')
while True:
    answers = input()    
    if answers == 'store':
        break
        print('Going to the store...')
    elif answers == 'woods':
        break
        print('Going to the woods...')
    while lists not in answers:
        print('That is not a valid answer')

Answer 1

您想要检查用户的答案是否不在您的有效答案列表中。你正在做的事情是相反的。试试这个：

if answers not in lists:
    print('That is not a valid answer')

此时您还想要break，或者再次打印提示信息。

Answer 2

试试这个：

print('Do you want to go to the store or woods?')
places = ('woods', 'store')
while True:
    answer = input()
    if answer in places:
        print ("Going to the {0}...".format(answer))
        break
    else:
        print('That is not a valid answer')

Answer 3

首先，您的print语句无法访问。您可以找到更多信息here。

#...
if answers == 'store':
        print('Going to the store...')
        break
    elif answers == 'woods':
        print('Going to the woods...')
        break
#...

然后，你的第二个while语句就没有意义了。如果您只想打印That is not a valid answer，以防输入与store或woods不同，并为用户再试一次 - 那么您可以使用else，而不是{{1}总之：

lists

如果您想检查，是否在print('Do you want to go to the store or woods?') # no lists while True: answers = input() if answers == 'store': print('Going to the store...') break elif answers == 'woods': print('Going to the woods...') break else: print('That is not a valid answer')中遇到了用户的输入，那么您需要在内部执行此lists操作：

in

在询问有效答案时无法完成循环

3 个答案: