text: import tensorflow as tf
  from model.config import cfg
  
  def instead(data):
      return data
  
  def zerof():
      return tf.constant(0.0, dtype=tf.float32)
  
  def zerof2():
      return tf.constant(0.0, dtype=tf.float32), tf.constant(0.0, dtype=tf.float32)
  
  def concat(a, b):
      return tf.concat([a, b], axis=0)