def add_flows(self, dpid, flows):
        url = (self._of_base_url +
               'datapaths/{0}/flows'.format(urllib.quote(dpid)))
        data = self._assemble_flows(flows)
        r = self.restclient.post(url, json.dumps(data))
        raise_errors(r)
Returns node files. If 'extended' is given, the extended version is
dataset/ETHPy150Open dave-tucker/hp-sdn-client/hpsdnclient/of.py/OfMixin.add_flows--crossover with--dataset/ETHPy150Open edelight/kitchen/kitchen/dashboard/api.py/get_nodes