code: def inputs(self):
      return [
          tf.TensorSpec((None, param.seq_len), tf.int32, "input"),
          tf.TensorSpec((None, param.seq_len), tf.int32, "nextinput"),
      ]
  
imports: import argparse
  import numpy
  import operator
  import os
  import sys
  from collections import Counter
  import tensorflow
  from tensorpack import *
  from tensorpack.tfutils import optimizer, summary
  from tensorpack.tfutils.gradproc import GlobalNormClip
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