Insert button to generate the tree

app.py

@@ -64,8 +64,10 @@ with demo:
             gr.Image(value="https://img.unocero.com/2019/11/facebook-app-para-hacer-memes-1-1024x576.jpg",label="", type="URL")
         with gr.Column():
             input_expr = gr.Textbox(label="Input", placeholder="Enter an expression here")
+            with gr.Row(): btn_get_tree = gr.Button(value="Get Tree") 
             out_flat_tree = gr.Textbox(label="Flat tree", value="")
-    
+        
+        
     out_image_tree = gr.HTML(label="")
 
     gr.Examples(
@@ -95,10 +97,15 @@ with demo:
         examples_per_page=25,
     )
     
-    input_expr.change(     
+    # input_expr.change(     
+    #     fn=genFlatDepthTree, 
+    #     inputs=input_expr, 
+    #     outputs=[out_image_tree, out_flat_tree])
+    btn_get_tree.click(
         fn=genFlatDepthTree, 
         inputs=input_expr, 
         outputs=[out_image_tree, out_flat_tree])
+    )
 
 demo.queue(concurrency_count=10)
 demo.launch(debug=True)