turnoff.py

#!/usr/bin/env python
import sys
import os

def turn_off():

	if sys.platform.startswith('linux'):
			import os
			os.system("xset dpms force off")

	elif sys.platform.startswith('win'):
			import subprocess
			subprocess.call("turnoff.exe")

			
	elif sys.platform.startswith('darwin'):
			import subprocess
			subprocess.call('echo \'tell application "Finder" to sleep\' | osascript', shell=True)