程序不接受任何用戶輸入

Question

我試圖讓這個程序接受1到1000之間的數字。我錯過了什麼？

def main (): 
    getGuestCnt () 

def getGuestCnt (): 
    guests = input("Please enter the number of guests: ") 
    while guests != isValidGuest (guests): 
     print ("Invalid! Enter only positive whole numbers.") 
     guests = input ("Please enter the number of guests: ") 
    return int(guests) 

def isValidGuest (guests): 
    return ((str(guests).isdigit()) and (int(guests) >= 0 and int(guests) <= 1000)) 

main () 

Answer 1

isValidGuest返回boolean表達式 - 你不應該把它比作在輸入的號碼，只需檢查它是否True或False：

while not isValidGuest (guests): 
    print ("Invalid! Enter only positive whole numbers.") 
    guests = input ("Please enter the number of guests: ") 

Answer 2

在你的條件下，你比較客人變量與你測試。 你真正做的是這樣的：

... 
while not isValidGuest(guests): 
    ...