fix last token pooling

semscore.py

@@ -98,6 +98,8 @@ class SemScore(evaluate.Metric):
     
     @staticmethod
     def _last_token_pooling(last_hidden_states, attention_mask):
+        if not isinstance(last_hidden_states, torch.Tensor):
+            last_hidden_states = last_hidden_states.last_hidden_state
         left_padding = (attention_mask[:, -1].sum() == attention_mask.shape[0])
         if left_padding:
             return last_hidden_states[:, -1]