new_contents: #!/usr/bin/env python
  
  import cec      # from python-cec
  import os.path
  import time
  
  cec.init()
  
  for adress, device in cec.list_devices().items():
      print device.address, device.vendor, device.osd_string
  
  tv = cec.Device(0)
  while True:
  
      if os.path.exists('/var/opt/screendisable/disable'):
          try:
              print tv.standby()
          
          except:
              print 'Reinitialising'
              cec.init()
              tv = cec.Device(0)
  
      time.sleep(2)
  
  
  
subject: Disable tv through raspberry pi's cec interface.