Answer 1

I checked out some stackoverflow threads but didn't find the thing exact thing that you need.
But I think these resources could be useful
https://stackoverflow.com/questions/43596427/how-to-check-if-a-server-needs-a-reboot
https://stackoverflow.com/questions/21287966/check-for-pending-reboots
You know? Google is your friend. There were lots of useful stuff so I recommend you to search some of them.
I'd try to find a way myself too
EDIT: There were these methods in os module
['sched_get_priority_min', 'sched_getaffinity', 'sched_getparam', 'sched_getscheduler', 'sched_param', 'sched_rr_get_interval', 'sched_setaffinity', 'sched_setparam', 'sched_setscheduler', 'sched_yield']
Unfortunately I can't try it from my phone as I get permission errors.
Also I'm not pro that those os stuff ^^ so I hope this would give you a hint about what you should do