code: def _get_system(model_folder):
      
  
      # Get model description
      model_description_file = os.path.join(model_folder, "info.yml")
      if not os.path.isfile(model_description_file):
          logging.error("You are probably not in the folder of a model, because "
                        "%s is not a file. (-m argument)",
                        model_description_file)
          sys.exit(-1)
      with open(model_description_file, 'r') as ymlfile:
          model_desc = yaml.load(ymlfile)
  
      # Get the feature and the preprocessing description
      feature_desc = _get_description(model_desc)
      preprocessing_desc = _get_description(feature_desc)
  
      return (preprocessing_desc, feature_desc, model_desc)
docs: Return the preprocessing description, the feature description and the
         model description.