輸出響應如果輸入包含在Python

Question

沒有數字

我試過了/除外，但我無法得到它的工作

下面的代碼：

#This is a guess the number game. 
import random 
secretNumber = random.randint(1, 20) 
print('I am thinking of a number between 1 and 20.') 
# Ask the player to guess 6 times. 
for guessesTaken in range(1, 7): 
    print('Take a guess.') 
    guess = int(input()) 
    if guess < secretNumber: 
     print('Your guess is too low.') 
    elif guess > secretNumber: 
     print('Your guess is too high.') 
    else: 
     break # This condition is the correct guess! 
if guess == secretNumber: 
    print('Good job! You guessed my number in ' + str(guessesTaken) + ' guesses!') 
else: 
    print('Nope. The number I was thinking of was ' + str(secretNumber)) 

~~~~ 顯然如果我輸入一個字符串，它不會滿足任何條件，它只會打破一個錯誤。我不希望它打破一個錯誤。我該怎麼辦？ 錯誤的是（這個詞，而不是數量「測試」響應時）：

Traceback (most recent call last): 
line 8, in <module> 
    guess = int(input()) 
ValueError: invalid literal for int() with base 10: 'test' 

Answer 1

您可以使用try/except趕上ValueError並添加一個循環，爲了保持要求的輸入，而無需耗費guessTaken直到數被輸入。例如：

for guessesTaken in range(1, 7): 
    print('Take a guess.') 
    guess = None 
    while guess is None: 
     try: 
      guess = int(input()) 
     except ValueError: 
      print('Please enter a number.') 
    if guess < secretNumber: 
     print('Your guess is too low.') 
    elif guess > secretNumber: 
     print('Your guess is too high.') 
    else: 
     break # This condition is the correct guess!