code: def inputs(self):
      return [
          tf.TensorSpec([None, None, None, 3], tf.float32, "image"),
          tf.TensorSpec([None, None, None], tf.int32, "edgemap"),
      ]
  
imports: import argparse
  import numpy
  import os
  import cv2
  import tensorflow
  from tensorpack import *
  from tensorpack.dataflow import dataset
  from tensorpack.tfutils import gradproc, optimizer
  from tensorpack.tfutils.summary import add_moving_summary, add_param_summary
  from tensorpack.utils.gpu import get_num_gpu
  from tensorpack.utils import logger
label_desc: Use image node_id 1 for calling the Model obj's underlying member method code with example usage: obj.inputs() and returns: list