updates for dropdown list

app.py

@@ -143,8 +143,8 @@ with gr.Blocks(theme=myTheme) as demo:
     lang_select = gr.Radio(["English", "Chinese"], label="Select Desired Language")
     result = gr.Textbox(label="Translated Result")
     trans_btn = gr.Button("Translate")
-    if toolkit_select.select(on_select, None, toolkit_select) == "OPUS":
+    if toolkit_select.select(on_select) == "OPUS":
         trans_btn.click(fn=opus_trans, inputs=[article, lang_select], outputs=result)
-    elif toolkit_select.select(on_select, None, toolkit_select) == "NLLB":
+    elif toolkit_select.select(on_select) == "NLLB":
         trans_btn.click(fn=nllb_trans, inputs=[article, lang_select], outputs=result)
 demo.launch()