def METHOD_NAME(n=2):
    d = {}
    start = time.time()
    for i in range(0, n):
        d[i] = double(i)
        # time.sleep(0.01)
    assert len(
        d.keys()) == n, "Only {0}/{1} keys in dict".format(len(d.keys()), n)
    [d[i].result() for i in d]
    print("Duration : {0}s".format(time.time() - start))
    print("[TEST STATUS] test_parallel_for [SUCCESS]")
    return d