code: def get_rec_features(self, features=None):
          
          if features is None:
              features = self.dist_funcs.keys()
          elif not isinstance(features, list):
              features = [features]
          return self.rec.applymap(lambda x: {k:v for k,v in x.items() if k != 'item'} if x is not None else None)
docs: Returns a df of features for recalled items