def get_stats_aggregate(match, table_id, out_port, callback,
                            timeout_callback=None, timeout=None):
returns a gnuplot file that can be used to draw the graph.
dataset/ETHPy150Open rlenglet/openfaucet/src/openfaucet/ofcontroller.py/IOpenflowControllerStub.get_stats_aggregate--crossover with--dataset/ETHPy150Open redhat-cip/edeploy/tools/grapher/models/basegraph.py/BaseGraph.__call__