def test_invalid_scalar_index(adata, index):
    # https://github.com/theislab/anndata/issues/619
    with pytest.raises(IndexError, match=r".*index.* out of range\."):
        _ = adata[index]
def due_date(self):
        """ Returns a date object of the todo's due date. """
        return self.get_date(config().tag_due())