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 __repr__(self):
        return "<differencematcher m1=%r, m2=%r>" % (self._m1, self._m2)