ptb_word_lm.py 文件源码

def main(_):
  if not FLAGS.data_path:
    raise ValueError("Must set --data_path to PTB data directory")

  raw_data = reader.ptb_raw_data(FLAGS.data_path)
  train_data, valid_data, test_data, _ = raw_data

  config = get_config()
  eval_config = get_config()
  eval_config.batch_size = 1
  eval_config.num_steps = 1

  with tf.Graph().as_default(), tf.Session() as session:
    initializer = tf.random_uniform_initializer(-config.init_scale,
                                                config.init_scale)
    with tf.variable_scope("model", reuse=None, initializer=initializer):
      m = PTBModel(is_training=True, config=config)
    with tf.variable_scope("model", reuse=True, initializer=initializer):
      mvalid = PTBModel(is_training=False, config=config)
      mtest = PTBModel(is_training=False, config=eval_config)

    tf.initialize_all_variables().run()

    for i in range(config.max_max_epoch):
      lr_decay = config.lr_decay ** max(i - config.max_epoch, 0.0)
      m.assign_lr(session, config.learning_rate * lr_decay)

      print("Epoch: %d Learning rate: %.3f" % (i + 1, session.run(m.lr)))
      train_perplexity = run_epoch(session, m, train_data, m.train_op,
                                   verbose=True)
      print("Epoch: %d Train Perplexity: %.3f" % (i + 1, train_perplexity))
      valid_perplexity = run_epoch(session, mvalid, valid_data, tf.no_op())
      print("Epoch: %d Valid Perplexity: %.3f" % (i + 1, valid_perplexity))

    test_perplexity = run_epoch(session, mtest, test_data, tf.no_op())
    print("Test Perplexity: %.3f" % test_perplexity)