code: def pretrain_info(self):
      return (
          "ResNet50_pretrained",
          "https://paddlemodels.bj.bcebos.com/video_classification/ResNet50_pretrained.tar.gz",
      )
  
imports: import numpy
  import paddle.fluid
  from paddle.fluid import ParamAttr
  from ..model import ModelBase
  from .tsn_res_model import TSN_ResNet
  import logging
label_desc: Use image node_id 11 for calling the TSN obj's underlying member method code with example usage: obj.pretrain_info() and returns: str,  str