我需要輸入一個數字。如果不是，顯示請輸入數字，並再次要求輸入

Question

這是我想要的，但對於整數。我不允許使用中斷或者繼續退出循環感謝

$#basically i need this, but with an int(input('please enter a numb 

ask = input('Would you like to play Steal or Deal [y|n]? ') 


while ask not in ('y', 'n'): 

    print ("Please enter either 'y' or 'n'") 
    print('') 
    ask = input('Would you like to play Steal or Deal [y|n]? ') 

Answer 1

你可以嘗試將字符串轉換成int和捕獲異常：

def is_number(s): 
    try: 
     int(s) 
     return True 
    except ValueError: 
     return False 

ask = input('please enter a number: ') 

while not is_number(ask): 

    print ("no, a number!") 
    print('') 
    ask = input('please enter a number: ')