在Python中使用生成器与常规函数来计算luhn数

# 生成器方式计算Luhn数
def luhn_generator(number):
    digits = [int(x) for x in str(number)]
    parity = len(digits) % 2
    for i, digit in enumerate(digits):
        if i % 2 == parity:
            digit *= 2
            if digit > 9:
                digit -= 9
        yield digit

# 常规函数方式计算Luhn数
def luhn_function(number):
    digits = [int(x) for x in str(number)]
    parity = len(digits) % 2
    luhn_sum = 0
    for i, digit in enumerate(digits):
        if i % 2 == parity:
            digit *= 2
            if digit > 9:
                digit -= 9
        luhn_sum += digit
    return luhn_sum % 10 == 0

# 使用生成器方式计算Luhn数
luhn_gen = luhn_generator(7992739871)
luhn_digits = list(luhn_gen)
luhn_sum = sum(luhn_digits)
is_valid = luhn_sum % 10 == 0
print("Luhn数:", luhn_digits)
print("和:", luhn_sum)
print("是否有效:", is_valid)

# 使用常规函数方式计算Luhn数
luhn_num = 7992739871
is_valid = luhn_function(luhn_num)
print("是否有效:", is_valid)