idle time on windows + turn monitor off

energysaver.py

#!/usr/bin/env python
#-*- coding: utf-8 -*-

from ctypes import Structure, windll, c_uint, sizeof, byref
from threading import Thread
import time, win32api, win32con


class LastInputInfo(Structure):
    _fields_ = [
  	('cbSize', c_uint),
		('dwTime', c_uint),
    ]


class Ociometro(Thread):
	def __init__ (self, ocio_max=10, cad=5.0):
		self.ocio_total=0
		Thread.__init__(self)
		self.lastInputInfo = LastInputInfo()
		self.cadencia = cad
		self.ocio_maximo = ocio_max
	
	def get_ociosidade(self):
		"""Retorna o tempo em segundos da ultima interação do usuario"""

		self.lastInputInfo.cbSize = sizeof(self.lastInputInfo)
		windll.user32.GetLastInputInfo(byref(self.lastInputInfo))
		return (windll.kernel32.GetTickCount() - self.lastInputInfo.dwTime) / 1000.0

	def run(self):
		"""Metodo principal, que fica verificando o tempo de ociosidade 
		do usuario e, caso exceda o maximo configurado, o monitor será 
		desligado"""

		while True:
			time.sleep(self.cadencia)
			self.ocio = self.get_ociosidade()
			if self.ocio > self.ocio_maximo:
				win32api.SendMessage(win32con.HWND_BROADCAST, win32con.WM_SYSCOMMAND, win32con.SC_MONITORPOWER,  2)


if __name__ == "main":
	o = Ociometro()
	o.start()

idle.py

#!/usr/bin/env python

from ctypes import Structure, windll, c_uint, sizeof, byref
import time

class LASTINPUTINFO(Structure):
    _fields_ = [
        ('cbSize', c_uint),
        ('dwTime', c_uint),
    ]

def get_idle_duration():
    lastInputInfo = LASTINPUTINFO()
    lastInputInfo.cbSize = sizeof(lastInputInfo)
    windll.user32.GetLastInputInfo(byref(lastInputInfo))
    millis = windll.kernel32.GetTickCount() - lastInputInfo.dwTime
    return millis / 1000.0

while True:
	time.sleep (2.0)
	idleness=get_idle_duration()
	if idleness> 10:
		print "away (%d sec w/o iteract)"%idleness
	else:
		print "active (%d sec w/o iteract)"%idleness