Update app.py

app.py

@@ -31,7 +31,7 @@ demo = gr.ChatInterface(fn=chat_with_interpreter,
                         clear_btn=None,
                         retry_btn=None,
                         undo_btn=None,
-                        additional_inputs=[openai_api_key],
+                        additional_inputs=openai_api_key,
                         additional_inputs_accordion_name = "OpenAI API Key"
                         ).queue()
 demo.launch(debug=True)