class_docstr: A mixin class for all pre-trained classes to inherit.
      
class_docstr_tok: ["A","mixin","class","for","all","pre-trained","classes","to","inherit","."]
docstr: Returns a dictionary of hyperparameters with default values.
  
  .. code-block:: python
  
      {
          "pretrained_model_name": None,
          "name": "pretrained_base"
      }
docstr_tok: ["Returns","a","dictionary","of","hyperparameters","with","default","values",".","..","code-block",":",":","python","{","``","pretrained_model_name","''",":","None",",","``","name","''",":","``","pretrained_base","''","}"]
code: def default_hparams():
      r"""Returns a dictionary of hyperparameters with default values.
  
      .. code-block:: python
  
          {
              "pretrained_model_name": None,
              "name": "pretrained_base"
          }
      """
      return {
          "pretrained_model_name": None,
          "name": "pretrained_base",
          "@no_typecheck": ["pretrained_model_name"],
      }
  
imports: import os
  import sys
  from abc import ABCMeta, abstractmethod
  from pathlib import Path
  from texar.tf.data.data_utils import maybe_download
  from texar.tf.hyperparams import HParams
  from texar.tf.module_base import ModuleBase
label_desc: Use image node_id 6 for calling the PretrainedMixin obj's underlying member method code with example usage: obj.default_hparams() and returns: dict