Python的錯誤消息：builtins.IndexError：字符串索引超出範圍

Question

我創建一個遊戲，程序會從包含5個選擇題文件中讀取，用戶可以回答這個問題，並獲得分數。但是我被卡住，因爲我得到同樣的錯誤消息：

builtins.IndexError: string index out of range 

這裏是我到目前爲止的代碼：

def main(): 
    playagain = True 
    while playagain: 
     inFile = open('Questions.txt', 'r') 
     condition = True 
     while condition: 
      for line in range(5): 
       line = inFile.readline() 
       print(line) 

      anskey = inFile.readline() 
      anskey = anskey[4] 

      status = True 
      while status: 
       useranswer = str(input('Enter your answer? ')) 
       useranswer = useranswer.upper() 

       if useranswer == 'A' or useranswer == 'B' or useranswer \ 
        == 'C' or useranswer == 'D': 
        status = False 
        if useranswer == anskey: 
         correct = correct + 1 
         print('Correct Answer!') 
        else: 
         print('Wrong Answer!') 
         correct = correct 
       else: 
        print('Answer not valid!') 


main() 

Answer 1

因爲有一個在你的代碼只有一個索引操作，在anskey[4]，我的猜測是你的inFile有一行少於5個字符的行。