def test_views():
    X = np.array(X_list)
    adata = ad.AnnData(X, obs=obs_dict, var=var_dict, uns=uns_dict, dtype="int32")

    assert adata[:, 0].is_view
    assert adata[:, 0].X.tolist() == np.reshape([1, 4, 7], (3, 1)).tolist()

    adata[:2, 0].X = [0, 0]

    assert adata[:, 0].X.tolist() == np.reshape([0, 0, 7], (3, 1)).tolist()

    adata_subset = adata[:2, [0, 1]]

    assert adata_subset.is_view
    # now transition to actual object
    adata_subset.obs["foo"] = range(2)
    assert not adata_subset.is_view

    assert adata_subset.obs["foo"].tolist() == list(range(2))
def test_init_errors(self):
        class Phone(Structure):
            _fields_ = [("areacode", c_char*6),
                        ("number", c_char*12)]

        class Person(Structure):
            _fields_ = [("name", c_char * 12),
                        ("phone", Phone),
                        ("age", c_int)]

        cls, msg = self.get_except(Person, b"Someone", (1, 2))
        self.assertEqual(cls, RuntimeError)
        self.assertEqual(msg,
                             "(Phone) <class 'TypeError'>: "
                             "expected string, int found")

        cls, msg = self.get_except(Person, b"Someone", (b"a", b"b", b"c"))
        self.assertEqual(cls, RuntimeError)
        if issubclass(Exception, object):
            self.assertEqual(msg,
                                 "(Phone) <class 'TypeError'>: too many initializers")
        else:
            self.assertEqual(msg, "(Phone) TypeError: too many initializers")