Add error handling for contest retrieval in app.py

- Implemented a try-except block around the contest name retrieval function to handle cases where no contests are found for the selected sport and game type.
- Added an error message to inform users when no contests are available, improving user experience and application robustness.

app.py

@@ -85,7 +85,11 @@ with tab1:
         with sport_options:
             sport_select = st.selectbox("Select Sport", ['MLB', 'MMA', 'GOLF', 'NBA', 'NHL'], key='sport_select')
             type_var = st.selectbox("Select Game Type", ['Classic', 'Showdown'], key='type_var')
-            contest_names, curr_info = grab_contest_names(db, sport_select, type_var)
+            try:
+                contest_names, curr_info = grab_contest_names(db, sport_select, type_var)
+            except:
+                st.error("No contests found for this sport, type, and date range")
+                st.stop()
             
         with date_options:
             date_list = curr_info['Date'].sort_values(ascending=False).unique()