def test_view_failed_delitem(attr):
    adata = gen_adata((10, 10))
    view = adata[5:7, :][:, :5]
    adata_hash = joblib.hash(adata)
    view_hash = joblib.hash(view)

    with pytest.raises(KeyError):
        getattr(view, attr).__delitem__("not a key")

    assert view.is_view
    assert adata_hash == joblib.hash(adata)
    assert view_hash == joblib.hash(view)
def __enter__(self):
        """
        Syntax sugar which helps in celery tasks, cron jobs, and other scripts

        Usage:
            with Tenant.objects.get(schema_name='test') as tenant:
                # run some code in tenant test
            # run some code in previous tenant (public probably)
        """
        connection = connections[get_tenant_database_alias()]
        self._previous_tenant.append(connection.tenant)
        self.activate()

        return self