[Fix] Fix small bug in alignbench (#764)

* fix small bugs

* fix small bugs

opencompass/summarizers/alignmentbench.py

@@ -70,7 +70,10 @@ def post_process_alignbench(judgement: str,
         pattern = rf"({'|'.join(possible_keys)}): (\d+(\.\d{{1,2}})?)"
         match = re.search(pattern, text)
         if match:
-            return float(match.group(1))
+            try:
+                return float(match.group(1))
+            except ValueError:
+                return -1
         return -1
 
     judgement = judgement.replace('\n', '')

tools/convert_alignmentbench.py

@@ -28,8 +28,6 @@ def extract_predictions_from_json(input_folder):
             # when only one complete file
             print(e)
             json_paths = [os.path.join(model_folder, 'alignment_bench.json')]
-        else:
-            raise FileNotFoundError
 
         all_predictions = []
         for json_ in json_paths: