update memory setting

app.py

@@ -361,6 +361,10 @@ async def start_playwright(question: str):
 # import playsound
 
 langchain.debug = True
+
+global memory3
+memory3 = ConversationBufferWindowMemory(memory_key="chat_history", return_messages=True)
+
 global memory2
 memory2 = ConversationBufferWindowMemory(memory_key="chat_history")
 global memory_openai
@@ -1018,7 +1022,7 @@ agent_STRUCTURED_ZEROSHOT_REACT = initialize_agent(tools_remote, GPTfake,
                          handle_parsing_errors = True,
                          max_iterations = int(os.environ["max_iterations"]),
                          early_stopping_method="generate",
-                         memory = memory2,
+                         memory = memory3,
                          agent_kwargs={
                             # 'prefix': PREFIX_2,
                             # 'format_instructions': FORMAT_INSTRUCTIONS_3,
@@ -1645,7 +1649,7 @@ def Text2Sound_HMI():
 
 def UpdateChatbot(Running_history):
     timestr = time.strftime("%Y-%m-%d-%H:%M:%S")
-    Running_history = Running_history + [(None, 'Timestamp: '+timestr)]
+    # Running_history = Running_history + [(None, 'Timestamp: '+timestr)]
     # yield Running_history
     WelcomeStr = """
     This is AI Assistant powered by MECH Core Team.