def test_meanByFixedLength(self):
rdd = self.sc.parallelize([((0,), array([0, 1, 2, 3, 4, 5, 6, 7], dtype='float16'))])
data = Series(rdd)
test1 = data.meanByFixedLength(4)
assert(test1.keys().collect() == [(0,)])
assert(allclose(test1.index, array([0, 1, 2, 3])))
assert(allclose(test1.values().collect(), [[2, 3, 4, 5]]))
test2 = data.meanByFixedLength(2)
assert(test2.keys().collect() == [(0,)])
assert(allclose(test2.index, array([0, 1])))
assert(allclose(test2.values().collect(), [[3, 4]]))
