code: def help(cls):
      print(
          "Supported models: {}".format(
              set().union(
                  cls.architecture_map.keys(), cls.thirdparty_map.keys()
              )
          )
      )
  
file_path: MMdnn/mmdnn/conversion/examples/keras/extractor.py
imports: from __future__ import absolute_import
  import os
  import keras
  from keras import backend
  from mmdnn.conversion.examples.imagenet_test import TestKit
  from mmdnn.conversion.examples.extractor import base_extractor
  from mmdnn.conversion.common.utils import download_file
label_desc: Use image node_id 1 for calling the keras_extractor obj's underlying member method code with example usage: obj.help(cls) without return types