code: def __init__(
      self,
      _sentinel=None,
      init_model_dir=None,
      save_model_dir=None,
      train=True,
      serve=False,
  ):
      self._train = train
      self._serve = serve
      self._init_model_dir = init_model_dir
      self._save_model_dir = save_model_dir
  
      self._flag_updated = False
      self._flag_isbuilt = False
  
      self.traingraph = _RecommenderGraph()
      self.servegraph = _RecommenderGraph()
  
      self.T = self.traingraph
      self.S = self.servegraph
  
imports: import tensorflow
  import numpy
  import os
label_desc: Use image node_id 1 to create a new Recommender object from inherited base classes: object with example: obj = Recommender(_sentinel, init_model_dir, save_model_dir, train, serve)