docstr: Method to treat and initialize the model
docstr_tok: ["Method","to","treat","and","initialize","the","model"]
code: def init_model(self):
      """
      Method to treat and initialize the model
  
      """
  
      # Map items and users with their respective ids and upgrade unobserved items with test set samples
      for i, item in enumerate(self.items):
          self.item_to_item_id.update({item: i})
          self.item_id_to_item.update({i: item})
      for u, user in enumerate(self.users):
          self.user_to_user_id.update({user: u})
          self.user_id_to_user.update({u: user})
  
file_path: CaseRecommender/caserec/recommenders/rating_prediction/base_nsvd1.py
imports: import numpy
  from caserec.recommenders.rating_prediction.base_rating_prediction import BaseRatingPrediction
label_desc: Use image node_id 2 for calling the BaseNSVD1 obj's underlying member method code with example usage: obj.init_model() without return types