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 open_link(self):
        "Open the selected item with the webbrowser"

        data = self.get_selected_item()
        url = data.get('permalink')
        if url:
            self.term.open_browser(url)
        else:
            self.term.flash()