code: def help(cls):
      print("Supported models: {}".format(cls.architecture_map))
  
file_path: MMdnn/mmdnn/conversion/examples/pytorch/extractor.py
imports: from __future__ import absolute_import
  import os
  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 torch
  import torchvision.models
label_desc: Use image node_id 1 for calling the pytorch_extractor obj's underlying member method code with example usage: obj.help(cls) without return types