def METHOD_NAME(setup):
    data = np.random.rand(10, 20)
    a = tensor(data, chunk_size=4)
    fl = a.flat
    fl[1:10] = 10
    b = fl[10:20]
    b[0:4] = 20
    npa = data.copy()
    npfl = npa.flat
    npfl[1:10] = 10
    npb = npfl[10:20]
    npb[0:4] = 20
    np.testing.assert_array_equal(b.execute(), npb)
    np.testing.assert_array_equal(a.execute(), npa)