Update app.py

show data loading notification at the top in the center

app.py

@@ -122,7 +122,11 @@ def server(input, output, session):
     @reactive.Calc
     def get_data_1():
         try:
-            ui.notification_show("Data takes a couple seconds to load.", duration=3, type = 'default')
+            ui.div(
+                {"style": "position:fixed; left: calc(50% - 150px); top: 0"},
+                ui.notification_show("Data takes a couple seconds to load.", duration=3, type = 'default'),
+            )
+            
             f1_session = ff1.get_session(int(input.year()), input.track_select(), input.session_type())
             f1_session.load()