random par ou impar (functional example)

fn.py

"""
Exemplo para ajudar a responder o problema de aninhamento em https://gist.github.com/AndersonFirmino/b0300923094a5a8450018c5bd32c9de8
"""
from itertools import filterfalse
from functools import partial
from random import choice, random

def pipe(*funcs):
    def inner(data, funcs=funcs):
        result = data
        for f in funcs:
            result = f(result)
        return result
    return inner


is_par = lambda x: x % 2 == 0
filter_par = partial(filter, is_par)
filter_impar = partial(filterfalse, is_par)
random_sorted = partial(sorted, key=lambda x: random())

flaged = pipe(range, tuple, filter_par, random_sorted, choice)
non_flaged = pipe(range, tuple, filter_impar, random_sorted, choice)


def odd_or_even(flag, limit):
    """Retorna um numero aleatorio pelo limite
    :param flag:
    :param limit:
    :return:
    """
    return flaged(limit) if flag else non_flaged(limit)