Update app.py

app.py

@@ -108,7 +108,10 @@ with gr.Blocks() as demo:
         
         df_category = gr.DataFrame(label='categories', value=df_cate, interactive=True)
         df_category_hidden = gr.DataFrame(value=df_cate, visible=False)
-        
+
+        with gr.Row():
+            btn_dl_cate = gr.Button('Download Categories', scale=1)
+            fi_categories = gr.File(visible=False, scale=9)
         with gr.Row():
             btn_reset_df = gr.Button("Reset categories")
             btn_classif = gr.Button("Categorize")
@@ -190,6 +193,7 @@ with gr.Blocks() as demo:
     btn_reset_df.click(reset_cate, inputs=df_category, outputs=df_category)
     btn_filter.click(filter_by_topics, inputs=[dd_filter, df_category_hidden], outputs=df_category)
     btn_add_categories.click(add_categories, inputs=[df_category, df_category_hidden],outputs=[dd_filter,df_category_hidden])    
+    btn_dl_cate.click(download_cate, inputs=btn_dl_cate, outputs=fi_categories)
     
     #charts
     btn_chart.click(create_bar_plot, inputs=[fi_excel, dd_label1, dd_label2], outputs=[plt_figure])