docstr: Add the command input options.
docstr_tok: ["Add","the","command","input","options","."]
code: def add_module_input_arg(self):
      """
      Add the command input options.
      """
      self.arg_input_group.add_argument(
          "--input_path", type=str, help="path to input image."
      )
  
file_path: PaddleHub/modules/image/image_processing/enlightengan/module.py
imports: import argparse
  import os
  import cv2
  import numpy
  import paddle
  import paddlehub
  from .enlighten_inference.pd_model.x2paddle_code import ONNXModel
  from .util import base64_to_cv2
  from paddlehub.module.module import moduleinfo
  from paddlehub.module.module import runnable
  from paddlehub.module.module import serving
label_desc: Use image node_id 6 for calling the EnlightenGAN obj's underlying member method code with example usage: obj.add_module_input_arg() without return types