Update app2.py

app2.py

@@ -32,12 +32,12 @@ button3 = pn.widgets.Button(icon='settings', icon_size='1.5em', name='Settings',
 # Custom RadioButtonGroup widget
 select = pn.widgets.RadioButtonGroup(value="⭐", options=["⭐", "🐘"], name='String', align='center')
 
-# Function to display the selected value
+# Define a callback to display the selected value
 def display_selected_value(event):
-    print(f"Selected value: {select.value}")
+    print(f"Selected value: {event.new}")
 
-# Attach the function to the RadioButtonGroup's on_click event
-select.on_click(display_selected_value)
+# Attach the callback to the value_change event of the RadioButtonGroup
+select.param.watch(display_selected_value, 'value')
 
 # Create a column layout for the buttons inside the toggleable sidebar
 buttons = pn.Column(