message: Adds __repr__ method to HParams.
diff: @@ -630,6 +630,9 @@ class HParams(object):
  def __str__(self):
  return str(sorted(self.values().items()))
  + def __repr__(self):
  + return '%s(%s)' % (type(self).__name__, self.__str__())
  +
  @staticmethod
  def _get_kind_name(param_type, is_list):
  """Returns the field name given parameter type and is_list.
  