Add application file

app.py

@@ -79,10 +79,12 @@ def validate_pred_file(df_pred):
 
 def get_revision(df_results, email):
     df_group_data = df_results[df_results['email'] == email]
+    curr_revision = 0
     if len(df_group_data) > 0:
-        return df_group_data['revision'].max()
-    else:
-        return 0
+        curr_revision = df_group_data['revision'].max()
+        if curr_revision >= MAX_SUBMISSIONS:
+            raise Exception("We're sorry but you reached your maximal number of submissions")
+    return curr_revision
 
 
 def get_results_dataframe():