Python while循环条件(Python while-loop conditions)

 我只是在while循环中有一个关于Python循环条件的快速问题。 我希望以（得分/最高分数）的形式从用户那里获取输入，例如（13/15）。 我希望把它放入一个while循环中，它会不断要求用户以这种形式输入输入，直到他们做对了。 
 
 到目前为止，我有这个 
 
num1 = 0
while num1 !='?/?':
    num1 = raw_input("Please enter your score in the form socre/max(eg. 30/50)")
 
 我知道如何使用单个数字检查条件是否为真，例如：while x> 18，或者条件是字符串，例如：while x！='Start'。 我不确定使用什么作为15/20条件的参数，其中这两个数字将以15/20的精确形式输入。 任何帮助将不胜感激。 
 
 谢谢 

I just have a quick question about Python loop conditions in the while loop. I am looking to take input from the user in the form of (score/max score) eg (13/15). I am looking to put this into a while loop that will continuously ask the user to enter the input in this form until they do it right. 
 
So far, I have this
 
num1 = 0
while num1 !='?/?':
    num1 = raw_input("Please enter your score in the form socre/max(eg. 30/50)")
 
I know how to check if a condition is true with a single number, such as: while x > 18, or if the condition is a string, such as: while x != 'Start'. I am not sure what to use as the parameters for the condition of 15/20, where these two numbers will be input in this exact form 15/20. Any help would be greatly appreciated. 
 
Thank you 

原文：https://stackoverflow.com/questions/49715746