def render(self):
        return [(name, points.get_zipped_graph())
                for name, points in self._data.items()]
:returns:
dataset/ETHPy150Open openstack/rally/rally/task/processing/charts.py/Chart.render--crossover with--dataset/ETHPy150Open wireservice/agate/agate/computations/percent_change.py/PercentChange.run