def test_drop_obs_column():
    adata = ad.AnnData(np.array(X_list), obs=obs_dict, dtype="int32")

    subset = adata[:2]
    assert subset.is_view
    # returns a copy of obs
    assert subset.obs.drop(columns=["oanno1"]).columns.tolist() == ["oanno2", "oanno3"]
    assert subset.is_view
    # would modify obs, so it should actualize subset and not modify adata
    subset.obs.drop(columns=["oanno1"], inplace=True)
    assert not subset.is_view
    assert subset.obs.columns.tolist() == ["oanno2", "oanno3"]

    assert adata.obs.columns.tolist() == ["oanno1", "oanno2", "oanno3"]
def testDeviceWrapper(self):
    wrapper_type = rnn_cell_wrapper_v2.DeviceWrapper
    x = array_ops.zeros([1, 3])
    m = array_ops.zeros([1, 3])
    cell = rnn_cell_impl.GRUCell(3)
    wrapped_cell = wrapper_type(cell, "/cpu:0")
    children = wrapped_cell._trackable_children()
    wrapped_cell.get_config()  # Should not throw an error
    self.assertIn("cell", children)
    self.assertIs(children["cell"], cell)

    outputs, _ = wrapped_cell(x, m)
    self.assertIn("cpu:0", outputs.device.lower())