Update app.py

app.py

@@ -290,13 +290,16 @@ with gr.Blocks(theme=gr.themes.Soft()) as demo:
         diversity_slider = gr.Slider(0, 100, value=25, step=1, label="Diversity")
             
         submit_button = gr.Button("Submit")
-        output_textbox = gr.Textbox(label="Output", interactive=False)
         download_button = gr.File(label="Download Processed File", visible=False)
 
         def on_submit(llm, file, relevance, diversity):
             result, output_file = process_inputs(llm, file, relevance, diversity)
-            download_button.update(visible=True)
-            return result, output_file
+            if output_file:
+                return gr.File.update(value=output_file, visible=True)
+            else:
+                return gr.File.update(visible=False)
+
+        submit_button.click(fn=on_submit, inputs=[llm_dropdown, file_upload, relevance_slider, diversity_slider], outputs=download_button)
             
 # Launch the Gradio app
 demo.launch()