问如何调试我的Python程序，该程序根据正数的均匀度对正数进行求和

EN

def sum_Digits(n):
    sum = 0
    if n % 2 == 0: #For even numbers
        while n>0:
            if (n%10)%2 == 0:
                sum += n%10
                n = n//10
            else:
                n = n//10
        print("sum: " , sum)
        return sum
    
        
    elif n % 2 != 0 : #For odd numbers
        while n>0:
            if (n%10)%2 != 0:
                sum += n%10
                n = n//10
            else:
                n = n//10
        print("sum: " , sum)
        return sum


def read_Numbers(N):
    maX = 0
    while N > 0:       #while askNum Positive continue summing
        suM = sum_Digits(N)
        if suM > maX:
                maX = N
        N = int(input("Please eneter a Natural number: "))
    if N <= 0:
        return maX
        
        


def main():
    num = int(input("Please enter a Natural number: ")) #asking the user to enter number
    sum_Digits(num)
    askNum = int(input("Please eneter a Natural number: "))
    maxSum = read_Numbers(askNum)
    print("Number with maximal sum: " , maxSum)
main()