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 _on_item_widget_key_press_event(self, widget, event, item):
    if event.state & gtk.gdk.MOD1_MASK:     # Alt key
      key_name = gtk.gdk.keyval_name(event.keyval)
      if key_name in ["Up", "KP_Up"]:
        self.reorder_item(
          item, self._get_item_position(item) - 1)
      elif key_name in ["Down", "KP_Down"]:
        self.reorder_item(
          item, self._get_item_position(item) + 1)