dynamic_rnn_estimator.py 文件源码

def apply_dropout(
    cell, input_keep_probability, output_keep_probability, random_seed=None):
  """Apply dropout to the outputs and inputs of `cell`.

  Args:
    cell: An `RNNCell`.
    input_keep_probability: Probability to keep inputs to `cell`. If `None`,
      no dropout is applied.
    output_keep_probability: Probability to keep outputs of `cell`. If `None`,
      no dropout is applied.
    random_seed: Seed for random dropout.

  Returns:
    An `RNNCell`, the result of applying the supplied dropouts to `cell`.
  """
  input_prob_none = input_keep_probability is None
  output_prob_none = output_keep_probability is None
  if input_prob_none and output_prob_none:
    return cell
  if input_prob_none:
    input_keep_probability = 1.0
  if output_prob_none:
    output_keep_probability = 1.0
  return contrib_rnn.DropoutWrapper(
      cell, input_keep_probability, output_keep_probability, random_seed)