輸入必須在100到200之間python

Question

我正在創建一個程序，使用戶輸入一個數字許多次，直到所述數字在100到200之間。如果用戶輸入字符串或非整數，則會創建錯誤消息並系統會提示用戶再次嘗試。目前，我有線路問題：

print("You tried " + guesssesTakenInt + "numbers and " + guessesTakenStr + 
    "non-number to get it right.") 

我想我必須把它做成一個while循環，使下面的錯誤：不定義guessesTakenInt。

## 
## a6p2.py 
## 


def main(): 
    # this is the code that runs when your program is executed 
    guessesTakenInt = 0 
    guessesTakenStr = 0 
    while True: 

     guessesTakenStr += 1 
     try: 
      userNumber = int(input("Please enter a number between 100 and 200: ")) 
     except ValueError: 
      print("Sorry that is not a number. ") 
      continue 
     else: 
      break 

    while userNumber > 0: 

     guessesTakenInt += 1ed 

     if userNumber > 200: 
      userNumber = int(input("This number is too big. Try again: ")) 
     elif userNumber < 100: 
      userNumber = int(input("This number is too low. Try again: ")) 
     else: 
      guessesTakenInt = str(guessesTakenInt) 
      guessesTakenStr = str(guessesTakenStr) 

       print("That number is just right!") 
       print("You tried " + guesssesTakenInt + "numbers and " + guessesTakenStr + " non-number to get it right.") 
       break 




    return 
    print (main()) 






############################################################### 
## DO NOT CHANGE THIS! LEAVE IT AT THE BOTTOM OF YOUR FILE 
## calls the main function when this file is run with Python 
## 
## python stats.py 
## 
############################################################### 
if __name__ == "__main__": 
    main() 

Answer 1

正如JJJ所述，您在那裏有一個錯字。但是，這還不是全部，你也有兩種不同的while：

1. 是用來檢查用戶是否在多個類型或不
2. 是用來檢查，如果數字是在100和200之間

---

這裏就是你需要做的：

1. 兩個while應該合併合爲一體。
2. 使用str.isnumeric()在將字符串解析爲int(str)之前測試該字符串是否爲NaN。
3. 變化guesssesTakenInt到guessesTakenInt
4. 變化guessesTakenInt += 1ed到guessesTakenInt += 1
5. 解決您的壓痕

---

我冒昧地改變你的代碼。

def main(): 
    # this is the code that runs when your program is executed 
    guessesTakenInt = 0 
    guessesTakenStr = 0 

    user_input = input("Please enter a number between 100 and 200: ") 

    while True: 
     if user_input.isnumeric(): 
      user_input = int(user_input) 
      guessesTakenInt += 1 
      if user_input > 200: 
       user_input = input("This number is too big. Try again: ") 
      elif user_input < 100: 
       user_input = input("This number is too low. Try again: ") 
      else: 
       guessesTakenInt = str(guessesTakenInt) 
       guessesTakenStr = str(guessesTakenStr) 
       print("That number is just right!") 
       print("You tried {} numbers and {} non-numbers to get it right.".format(guessesTakenInt, guessesTakenStr)) 
       break 
     else: 
      guessesTakenStr += 1 
      print("Sorry that is not a number. ") 
      user_input = input("Please enter a number between 100 and 200: ") 

main()