Update app.py

app.py

@@ -129,8 +129,9 @@ def vector_search(index,index_1, query_embedding, k=3, threshold=0.5):
         for i in range(k):
             if distances[0][i] > 0.4:  # 余弦相似度的距离应该是越大越相似
                 results.append(docs[indices[0][i]])      
-    print('\n'.join(results))     
-    return results if results else None
+    if not results:
+        results.append(docs[indices[0][0]])          
+    return results 
 def resume_QA(message, history):
     if history is not None:
         user_q= [m[0] for m in history ]