如何用Python处理新加坡车牌的校验和

def validate_singapore_plate(plate_number):
    if len(plate_number) != 7:
        return False
    
    prefix = plate_number[0]
    digits = plate_number[1:6]
    check_digit = plate_number[6]
    
    if not prefix.isalpha() or not digits.isdigit() or not (check_digit.isdigit() or check_digit == 'X'):
        return False
    
    weights = [2, 7, 6, 5, 4]
    total = sum(int(digit) * weight for digit, weight in zip(digits, weights))
    remainder = total % 11
    
    if remainder == 10:
        expected_check_digit = 'X'
    else:
        expected_check_digit = str(remainder)
    
    return check_digit == expected_check_digit

# 示例使用
plate_number = "A12345B"
if validate_singapore_plate(plate_number):
    print(f"车牌号码 {plate_number} 是有效的。")
else:
    print(f"车牌号码 {plate_number} 是无效的。")