dropdown change event

app.py

@@ -36,8 +36,11 @@ with block:
     )
     with gr.Group():
         with gr.Box():
-          sz = gr.Dropdown(label="Model Size", choices=['base','small', 'medium', 'large'], value='base')
-          sz.change(change_model, inputs=[sz], outputs=[])
+          sz = gr.Dropdown(
+            label="Model Size", 
+            choices=['base', 'small', 'medium', 'large'], 
+            value='base'
+            ).change(change_model, inputs=[sz], outputs=[])
           link = gr.Textbox(label="YouTube Link")
           text = gr.Textbox(
               label="Transcription",