通过输入用户验证号码

Question

I am new to programming and I wanted to write a code, and it turned out like this: (btw, bsn number is a registration number in my country and with this code I try to validate a random bsn number)

check_digits = [9, 8, 7, 6, 5, 4, 3, 2, -1]
bsn = input('Which bsn number do you want to check?')
total = 0

def has_valid_bsn_length(bsn):
    len(bsn) == 9
    if len(bsn) != 9:
        print('Not a valid bsn number')
    else:
        return bsn


def has_valid_check_digit(bsn):
    for i in range(0, 9):
        digit = int(bsn[i])
        result = digit * check_digits[i]
        total = result

if total % 11 ==0:
    print('Valid bsn')
else:
    print('Not a valid bsn number')

When I try this code, no answer appears. Does any of you know how I can change the code so it works properly?

Answer 1

It seems to me you have a syntax error on line 6: len(bsn) == 9 Also you have to call your functions. As of now you have just defined them. Add calls like that: result = has_valid_check_digit(bsn)

And your second function does not return any value.