Update app.py

app.py

@@ -118,7 +118,7 @@ idx_all = []
 if name_option != '':
     idx_all.append(filter_by_1col(df, 'name', name_option, exact_flag=False)) 
 
-if star_option is not None:
+if star_option != 'None':
     idx_all.append(filter_by_1col_num(df, 'star', star_option, oper_flag="eq"))    
 
 if speed_option != 'None':