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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def autoencoder_autoregressive():
 """Autoregressive autoencoder model."""

  hparams = autoencoder_basic()
  hparams.add_hparam("autoregressive_forget_base", False)
  hparams.add_hparam("autoregressive_mode", "none")
  hparams.add_hparam("autoregressive_decode_steps", 0)
  hparams.add_hparam("autoregressive_eval_pure_autoencoder", False)
  hparams.add_hparam("autoregressive_gumbel_sample", False)
  return hparams