Update app.py

app.py

@@ -10,7 +10,11 @@ BATCH_SIZE = 1
 device = 0 if torch.cuda.is_available() else "cpu"
 
 def score(test_file, ref_file, score_list_nis, score_list_is, return_timestamps):
-    score_list = score_list_nis + score_list_is
+    score_list = []
+    if score_list_nis is not None:
+        score_list += score_list_nis
+    if score_list_is is not None:
+        score_list += score_list_is        
     mySpeechScore = SpeechScore(score_list)  
     scores = mySpeechScore(test_path=test_file, reference_path=ref_file, window=None, score_rate=16000, return_mean=False)
     return scores