message: Change estimator to only log non-binary eval metrics, because logging binary metrics such as images will lead to crash.
diff: @@ -1256,7 +1256,8 @@ def _dict_to_str(dictionary):
  A `str` representing the `dictionary`.
  """
  return ', '.join('%s = %s' % (k, v)
  - for k, v in sorted(six.iteritems(dictionary)))
  + for k, v in sorted(six.iteritems(dictionary))
  + if not isinstance(v, six.binary_type))
  def _write_dict_to_summary(output_dir,
  