code: def add_evaluation_args(parser):
      """
      keywords defined for evaluation action
  
      :param parser:
      :return:
      """
      parser.add_argument(
          "--evaluations",
          metavar="",
          help="[Evaluation only] List of evaluations to generate",
          default="",
      )
  
      parser.add_argument(
          "--save_csv_dir",
          metavar="",
          help="[Evaluation only] Directory to save evaluation metrics",
          default=DEFAULT_EVALUATION_OUTPUT,
      )
  
      return parser
  
file_path: NiftyNet/niftynet/utilities/user_parameters_default.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import os
  from niftynet.engine.image_window_dataset import SMALLER_FINAL_BATCH_MODE
  from niftynet.io.image_loader import SUPPORTED_LOADERS
  from niftynet.io.image_sets_partitioner import SUPPORTED_PHASES
  from niftynet.utilities.user_parameters_helper import float_array, int_array, spatial_atleast3d, spatialnumarray, str2boolean, str_array
  from niftynet.utilities.util_import import require_module
label_desc: Use image node_id 3 for calling a global function with example usage: add_evaluation_args(parser) and returns: parser