code: def lstm_luong_attention():
      """Hparams for LSTM with luong attention."""
      hparams = lstm_attention_base()
      hparams.add_hparam("attention_mechanism", "luong")
      return hparams
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import copy
  from tensor2tensor.layers import area_attention
  from tensor2tensor.layers import common_hparams
  from tensor2tensor.layers import common_layers
  from tensor2tensor.utils import contrib
  from tensor2tensor.utils import registry
  from tensor2tensor.utils import t2t_model
  import tensorflow.compat.v1
  from tensorflow.compat.v1 import estimator
label_desc: Use image node_id 12 for calling a global function with example usage: lstm_luong_attention() and returns: hparams