Update app.py

app.py

@@ -122,7 +122,7 @@ with gr.Blocks() as demo:
 
         accuracy_button = gr.Button("Calculate Accuracy")
         # csv = gr.File(visible=False)
-        download_btn = gr.DownloadButton(visible=False)
+        download_csv = gr.DownloadButton(visible=False)
         num_posts = gr.Number(visible=False)
         data = gr.DataFrame(visible=False) 
         data_eval = gr.DataFrame()
@@ -134,7 +134,7 @@ with gr.Blocks() as demo:
         accuracy_button.click(
             calculate_accuracy, 
             inputs=[flood_checkbox_output, fire_checkbox_output, none_checkbox_output, num_posts, text_field, data], 
-            outputs=[incorrect, correct, accuracy, data_eval, csv])
+            outputs=[incorrect, correct, accuracy, data_eval, download_csv])
                 
     with gr.Tab("Question Answering"):
         # XXX Add some button disabling here, if the classification process is not completed first XXX