import tensorflow as tf

  # def feature_encoders(self):
  #  return {"inputs": text_encoder.TextEncoder(), "targets": text_encoder.TextEncoder()}

  def example_reading_spec(self):
    data_fields = {"inputs": tf.VarLenFeature(tf.int64), "targets": tf.VarLenFeature(tf.int64)}
    data_items_to_decoders = None
    return (data_fields, data_items_to_decoders)

