CU-8697v6qr2 add logging suggested by the review

Author: baixiac

medcat/ner/transformers_ner.py

@@ -344,8 +344,10 @@ def expand_model_with_concepts(self, cui2preferred_name: Dict[str, str], use_avg
         avg_weight = torch.mean(self.model.classifier.weight, dim=0, keepdim=True)
         avg_bias = torch.mean(self.model.classifier.bias, dim=0, keepdim=True)
 
+        new_cuis = set()
         for label, preferred_name in cui2preferred_name.items():
             if label in self.model.config.label2id.keys():
+                logger.warning("Concept ID '%s' already exists in the model, skipping...", label)
                 continue
 
             sname = preferred_name.lower().replace(" ", "~")
@@ -382,6 +384,10 @@ def expand_model_with_concepts(self, cui2preferred_name: Dict[str, str], use_avg
             self.model.num_labels += 1
             self.model.classifier.out_features += 1
 
+            new_cuis.add(label)
+
+        logger.info("Model expanded with the new concept(s): %s and shall be retrained before use.", str(new_cuis))
+
     @classmethod
     def load(cls, save_dir_path: str, config_dict: Optional[Dict] = None) -> "TransformersNER":
         """Load a meta_cat object.