def test_set_varm_key(adata):
    init_hash = joblib.hash(adata)

    orig_varm_val = adata.varm["o"].copy()
    subset_varm = adata[:, :50]
    assert subset_varm.is_view
    subset_varm.varm["o"] = np.ones((50, 20))
    assert not subset_varm.is_view
    assert np.all(adata.varm["o"] == orig_varm_val)

    assert init_hash == joblib.hash(adata)
def exiter_as_until_exception(
        cls, new_exiter_fun: Callable[[Optional[Exiter]], Exiter]
    ) -> Iterator[None]:
        """Temporarily override the global exiter, except this will unset it when an exception
        happens."""
        previous_exiter = cls._exiter
        new_exiter = new_exiter_fun(previous_exiter)
        try:
            cls._reset_exiter(new_exiter)
            yield
        finally:
            cls._reset_exiter(previous_exiter)