def test_view_of_view_modification():
    adata = ad.AnnData(np.zeros((10, 10)))
    adata[0, :][:, 5:].X = np.ones(5)
    assert np.all(adata.X[0, 5:] == np.ones(5))
    adata[[1, 2], :][:, [1, 2]].X = np.ones((2, 2))
    assert np.all(adata.X[1:3, 1:3] == np.ones((2, 2)))

    adata.X = sparse.csr_matrix(adata.X)
    adata[0, :][:, 5:].X = np.ones(5) * 2
    assert np.all(asarray(adata.X)[0, 5:] == np.ones(5) * 2)
    adata[[1, 2], :][:, [1, 2]].X = np.ones((2, 2)) * 2
    assert np.all(asarray(adata.X)[1:3, 1:3] == np.ones((2, 2)) * 2)
def demag(isa, ax=0):
    """plot demag of NC/I7/ISA7 model
    Args:
      isa: Isa7/NC object
    """
    emag = [e for e in isa.elements if e.is_magnet()]
    demag = np.array([e.demagnetization(isa.MAGN_TEMPERATURE) for e in emag])
    _contour(ax, f'Demagnetization at {isa.MAGN_TEMPERATURE} °C',
             emag, demag, '-H / kA/m', isa)
    logger.info("Max demagnetization %f", np.max(demag))