code: def dump_v2_config(cls, topology, save_path, binary=False):
      import collections
  
      from paddle.trainer_config_helpers.layers import LayerOutput
      from paddle.v2.layer import parse_network
      from paddle.proto import TrainerConfig_pb2
  
      """ Dump the network topology to a specified file.
          This function is only used to dump network defined by using PaddlePaddle V2
          API.
          :param topology: The output layers in the entire network.
          :type topology: LayerOutput|List|Tuple
          :param save_path: The path to save the dump network topology.
          :type save_path: str
          :param binary: Whether to dump the serialized network topology. The default
                      value is false.
          :type binary: bool.
          """
  
      if isinstance(topology, LayerOutput):
          topology = [topology]
      elif isinstance(topology, collections.Sequence):
          for out_layer in topology:
              assert isinstance(out_layer, LayerOutput), (
                  "The type of each element in the parameter topology "
                  "should be LayerOutput."
              )
      else:
          raise RuntimeError("Error input type for parameter topology.")
  
      model_str = parse_network(topology)
      with open(save_path, "w") as fout:
          if binary:
              fout.write(model_str.SerializeToString())
          else:
              fout.write(str(model_str))
  
file_path: MMdnn/mmdnn/conversion/examples/paddle/extractor.py
imports: from __future__ import absolute_import
  from mmdnn.conversion.examples.imagenet_test import TestKit
  from mmdnn.conversion.examples.extractor import base_extractor
  from mmdnn.conversion.common.utils import download_file
  import paddle.v2
  import gzip
  from paddle.trainer_config_helpers.config_parser_utils import reset_parser
label_desc: Use image node_id 1 for calling the paddle_extractor obj's underlying member method code with example usage: obj.dump_v2_config(cls, topology, save_path, binary) without return types