Python Unit Upgrade Function?

Is there a section in the python similar to onunitkilled or onunitbuilt in the event manager to allow something to happen when you upgrade a unit? the most i see is on unit promoted but im sure that affects promotions and not upgrades.

There is unfortunately not a native Python unitUpgraded event. However, a unit upgrade does trigger both unitCreated and unitLost events if they are enabled in PythonCallbackDefines.xml so depending on your needs you might be able to work around it.