Update app.py

add loading notification

app.py

@@ -122,6 +122,7 @@ 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')
             f1_session = ff1.get_session(int(input.year()), input.track_select(), input.session_type())
             f1_session.load()
 
@@ -152,6 +153,7 @@ def server(input, output, session):
     @reactive.Calc
     def get_data_2():
         try:
+            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()