docstr: Method to treat and initialize the model. Create a matrix user x item
docstr_tok: ["Method","to","treat","and","initialize","the","model",".","Create","a","matrix","user","x","item"]
code: def init_model(self):
      """
      Method to treat and initialize the model. Create a matrix user x item
  
      """
  
      self.number_users = len(self.users)
      self.number_items = len(self.items)
  
      self.create_matrix()
  
file_path: CaseRecommender/caserec/recommenders/rating_prediction/base_knn.py
imports: from caserec.recommenders.rating_prediction.base_rating_prediction import BaseRatingPrediction
label_desc: Use image node_id 2 for calling the BaseKNN obj's underlying member method code with example usage: obj.init_model() without return types