Update app.py

app.py

@@ -199,8 +199,10 @@ with gr.Blocks() as demo:
         user_message = history[-1][0]
         #bot_message = chat_engine.chat(user_message)
         bot_message = query_engine.query(user_message + "Let's think step by step to get the correct answer. If you cannot provide an answer, say you don't know.")
+        source_nodes = bot_message.source_nodes
+        final_response = bot_message.response + "\n Source nodes: \n" + source_nodes
         history[-1][1] = ""
-        for character in bot_message.response:
+        for character in final_response:
             history[-1][1] += character
             time.sleep(0.01)
             yield history