code: def help(cls):
      print(
          "Supported models: {}".format(
              list(cls.architecture_map.keys())
          )
      )
  
file_path: MMdnn/mmdnn/conversion/examples/extractor.py
imports: from __future__ import absolute_import
label_desc: Use image node_id 2 for calling the base_extractor obj's underlying member method code with example usage: obj.help(cls) without return types