Update app.py

app.py

@@ -28,7 +28,8 @@ def create_assistant(client):
                      ),
         model="gpt-4o",
         tools=[
-                  {"type": "code_interpreter"}, 
+                  {"type": "code_interpreter"},
+                  {"type": "retrieval"},
               ],
     )
     
@@ -127,7 +128,7 @@ def chat(message, history):
     global client, assistant, thread     
     
     if assistant == None:
-        assistant = load_assistant(client)
+        assistant = create_assistant(client)
     
     if thread == None or len(history) == 0:
         thread = create_thread(client)