auto shutdown script when inactive

autoshutdown.py

import os
import pprint
from time import sleep

INACTIVE_TIME = 30

pp = pprint.PrettyPrinter(indent=4)

inactive_count = 0

while True:
  session_cnt = int(os.popen('w -h | wc -l').read().rstrip())
  #pp.pprint(session_cnt)

  if session_cnt == 0:
    inactive_count += 1
    if inactive_count > INACTIVE_TIME:
      os.system('/sbin/shutdown -h now')
  else:
    inactive_count = 0

  sleep(60)