code: def get_network(self, name, batch_size=None, callback=None):
          '''Create a variable graph given  network by name
  
          Returns: NnpNetwork
  
          '''
          network_proto = nnabla_pb2.Network()
          network_proto.CopyFrom(self.network_dict[name])
          return NnpNetwork(network_proto, self._params, batch_size, callback=callbackf get_network(self, name, batch_size=None, callback=None):
          '''Create a variable graph given  network by name
  
          Returns: NnpNetwork
  
          '''
          network_proto = nnabla_pb2.Network()
          network_proto.CopyFrom(self.network_dict[name])
          return NnpNetwork(network_proto, self._params, batch_size, callback=callback)
docs: Create a variable graph given  network by name
  
          Returns: NnpNetwork