Function test_tokenize_numpy_memmap

dask/tests/test_tokenize.py:221–246

()

@pytest.mark.skipif("not np")
def test_tokenize_numpy_memmap():
    with tmpfile(".npy") as fn:
        x1 = np.arange(5)
        np.save(fn, x1)
        y = check_tokenize(np.load(fn, mmap_mode="r"))

    with tmpfile(".npy") as fn:
        x2 = np.arange(5)
        np.save(fn, x2)
        z = check_tokenize(np.load(fn, mmap_mode="r"))

    assert check_tokenize(x1) == check_tokenize(x2)
    assert y == z

    with tmpfile(".npy") as fn:
        x = np.random.normal(size=(10, 10))
        np.save(fn, x)
        mm = np.load(fn, mmap_mode="r")
        mm2 = np.load(fn, mmap_mode="r")
        a = check_tokenize(mm[0, :])
        b = check_tokenize(mm[1, :])
        c = check_tokenize(mm[0:3, :])
        d = check_tokenize(mm[:, 0])
        assert len({a, b, c, d}) == 4
        assert check_tokenize(mm) == check_tokenize(mm2)
        assert check_tokenize(mm[1, :]) == check_tokenize(mm2[1, :])


@pytest.mark.skipif("not np")