Update app.py

app.py

@@ -38,10 +38,12 @@ def chat(message, history, openai_api_key):
     
     global openai_client, assistant, thread
 
-    print("openai_client="+openai_client)
+    print("openai_client=")
+    print(openai_client)
     if openai_client == None:
         openai_client = OpenAI(api_key=openai_api_key)
-    print("openai_client="+openai_client)
+    print("openai_client=")
+    print(openai_client)
     
     # On first run, create assistant and update assistant_id,
     # see https://platform.openai.com/playground/assistants.