python - 'while'循环出错后如何返回特定点

Question

我正在尝试编写一个包含 while 循环的程序，在这个循环中，如果出现问题，我会收到一条错误消息。有点像这样；

while True:

    questionx = input("....")
    if x =="SomethingWrongabout questionX":
        print ("Something went wrong.")
        continue
    other codes...

    questiony = input("....")
    if y == "SomethingWrongabout questionY":
        print ("Something went wrong.")
        continue

    other codes...

    questionz = input("....")
    if z == "SomethingWrongabout questionZ":
       print ("Something went wrong.")
       continue

    other codes..

问题如下:当questionX后出现错误，程序回到开头。它从头开始，而不是从 y 或 z 开始。但是在x没有问题，所以，程序应该从y或z开始提问，因为，问题发生在y 或 z。

我怎样才能让程序从一个特定的点开始，比如如果只有 yquestion 有错误，程序必须从 y 开始提问，或者如果只有在 z 处，程序必须从 z 开始，而不是 x 开始。

我应该为此使用多个 while 循环，还是有什么可以使它只在一个循环中工作？

Answer 1

[从生成器编辑到函数]

你可以试试一个函数:

def check_answer(question, answer):
    while True:
        current_answer = input(question)
        if current_answer == answer:
            break
        print "Something wrong with question {}".format(question)
    return current_answer

answerX = check_answer("Question about X?\n", "TrueX")
answerY = check_answer("Question about Y?\n", "TrueY")
answerZ = check_answer("Question about Z?\n", "TrueZ")

不确定您是否要保留这些值，但如果您需要调整它，这应该会给您提示。

结果:

Question about X?
"blah"
Something wrong with question Question about X?

Question about X?
"blah"
Something wrong with question Question about X?

Question about X?
"TrueX"
Question about Y?
"TrueY"
Question about Z?
"blah"
Something wrong with question Question about Z?

Question about Z?
"blah"
Something wrong with question Question about Z?

Question about Z?
"TrueZ"

根据评论编辑:

def check_answer(question, answers):
    while True:
        current_answer = input(question)
        if current_answer in answers:
            break
        print "Something wrong with question {}".format(question)
    return current_answer

answerX = check_answer("Question about X?\n", ("TrueX", "TrueY")