fizzbuzz.py

from __future__ import print_function

def mul_check_closure(mul_num, out_str):
    """
    Genelate multiple ckeck closure.
    :param mul_num: check if n of mul_num.
    :param out_str: For mul_num of multiple, return out_str
    :returns: function (lambda)

    >>> mul_check_closure(3, "fizz")(3)
    'fizz'
    >>> mul_check_closure(3, "fizz")(5)
    ''
    """
    return lambda num: out_str if (num % mul_num == 0) else ""

fizz_check = mul_check_closure(3, "fizz")
buzz_check = mul_check_closure(5, "buzz")

def _fizz_buzz(num):
    """
    process fizzbuzz

    >>> _fizz_buzz(1)
    1
    >>> _fizz_buzz(3)
    'fizz'
    >>> _fizz_buzz(5)
    'buzz'
    >>> _fizz_buzz(15)
    'fizzbuzz'
    """
    return (fizz_check(num) + buzz_check(num)) or num

def fizz_buzz(num):
    [print(_fizz_buzz(n)) for n in range(1, num + 1)]

def test_fizzbuzz():
    import doctest
    doctest.testmod()