Annotate cron_file_helper.

scripts/nagios/cron_file_helper.py

@@ -1,7 +1,11 @@
 #!/usr/bin/env python
 import time
 
+# Avoid requiring the typing module to be installed
+if False: from typing import Tuple
+
 def nagios_from_file(results_file):
+    # type: (str) -> Tuple[int, str]
     """Returns a nagios-appropriate string and return code obtained by
     parsing the desired file on disk. The file on disk should be of format