code: def network(self, network_id):
          
          self._ensure_authenticated()
          return Network(network_id, self._rpc_api.session)
docs: Returns :class:`Network` instance for ``network_id``
  
          :type  network_id: str
          :param network_id: This is the ID of the network.
              This can be found by visiting your class page
              on Piazza's web UI and grabbing it from
              https://piazza.com/class/{network_id}