message: Change the default seed in TPUEstimator's RunConfig to be None.
diff: @@ -63,7 +63,18 @@ class RunConfig(run_config_lib.RunConfig):
  """RunConfig with TPU support."""
  def __init__(self, tpu_config=None, evaluation_master='', master='',
  - **kwargs):
  + tf_random_seed=None, **kwargs):
  + """Constructs a RunConfig.
  +
  + Args:
  + tpu_config: the TPUConfig that specifies TPU-specific configuration.
  + evaluation_master: a string. The address of the master to use for eval.
  + master: a string. The address of the master to use for training.
  + tf_random_seed: an int. Sets the TensorFlow random seed. Defaults to None,
  + which initializes it randomly based on the environment.
  + """
  + # We change the default random seed to None because that's a better default.
  + kwargs['tf_random_seed'] = tf_random_seed
  super(RunConfig, self).__init__(**kwargs)
  self._tpu_config = tpu_config or TPUConfig()
  self._evaluation_master = evaluation_master
  