def test_modify_uns_in_copy():
    # https://github.com/theislab/anndata/issues/571
    adata = ad.AnnData(np.ones((5, 5)), uns={"parent": {"key": "value"}})
    adata_copy = adata[:3].copy()
    adata_copy.uns["parent"]["key"] = "new_value"
    assert adata.uns["parent"]["key"] != adata_copy.uns["parent"]["key"]
def test_none_to_pointer_fields(self):
        class S(Structure):
            _fields_ = [("x", c_int),
                        ("p", POINTER(c_int))]

        s = S()
        s.x = 12345678
        s.p = None
        self.assertEqual(s.x, 12345678)