如何使用while循環來計算結果？

Question

例子：

choice(['Aa', 'Bb', 'Cc') 

應打印：

Enter choice: Aa 
Enter choice: Cc 
Enter choice: Aa 
Enter choice: Aa 
Enter choice: Bb 
Enter choice: Cc 
Enter choice: Aa 
Enter choice: 

There are 4 choices for Aa. 

There are 2 choices for Cc. 

There are 1 choices for Bb. 

There is 1 choice for Unknown. 

注意，它不斷要求你的選擇是什麼，直到有一個空白。

至今：

畫質選擇（N）：

while True: 

    vote = input('Enter choice: ') 

Answer 1

這聽起來很像功課，所以這裏的一些僞代碼：

function choice gets an options list 

    counter is a dictionary 
    for each option in the options list 
     counter[option] is 0 
    counter[unknown] is 0 

    loop 
     ask for input 
     if input is blank 
      exit the loop 
     otherwise if input is in the option array 
      increment counter[input] 
     otherwise 
      increment counter[unknown] 

    for each option in the options list 
     "Option {option} had {counter[option]} votes" 
    "Option unknown had {counter[unknown]} votes"