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 _find_user(self, dn):
        return next(i for (i, d) in enumerate(self.directory) if d["dn"] == dn)