new_contents: #!/usr/bin/env python3
  #
  # Talking clock, using my Google Home device as a media player.
  #
  import pychromecast, uuid, time, datetime
  
  #
  # Get list of all Chromecast devices.
  # The local computer must be in the same Wi-Fi network.
  #
  def print_all_chromecasts():
      all_cast_devices = pychromecast.get_chromecasts()
      print("All Chromecast devices:", all_cast_devices)
  
  #
  # Find media controller by unique ID.
  #
  def find_media_controller(my_uuid):
      all_cast_devices = pychromecast.get_chromecasts()
      my_cast_device = next(x for x in all_cast_devices if str(x.device.uuid) == my_uuid)
      return my_cast_device.media_controller
  
  #
  # Open media controller with given IP address, port and unique ID.
  #
  def open_media_controller(my_uuid, my_ip_addr, my_port):
      my_device = pychromecast.DeviceStatus(friendly_name = 'Abra',
                                            model_name = 'Cadabra',
                                            manufacturer = 'Unknown',
                                            uuid = uuid.UUID(my_uuid),
                                            cast_type = 'cast')
      my_cast_device = pychromecast.Chromecast(my_ip_addr,
                                               port = my_port,
                                               device = my_device)
      print("My Chromecast device:", my_cast_device)
      return my_cast_device.media_controller
  
  #
  # Play a video on my Chromecast device.
  #
  def play_media(mc, url, media_type):
      print("Playing media:", url)
      mc.play_media(url, content_type = media_type)
      mc.block_until_active()
      mc.play()
  
      # Wait until done.
      while True:
          time.sleep(1)
          mc.update_status()
          if mc.status.player_is_idle:
              break
  
  #
  # Get time.
  #
  now = datetime.datetime.today()
  hour = now.hour
  minute = now.minute
  print(f"Time: {hour}:{minute}")
  
  #
  # When the time is exact, voice it.
  #
  if minute == 0:
      # Open my media controller.
      mc = open_media_controller("c854c4ea-517a-29cf-e083-1e63659ea1c6", "192.168.86.75", 8009)
  
      # Play a chime, to get attention.
      play_media(mc, "http://166.84.7.114/pub/media/talking-clock/service-login.oga", "application/ogg")
  
      # Speak the hour.
      filename = f"{hour:02d}_ru.mp3"
      play_media(mc, "http://166.84.7.114/pub/media/talking-clock/" + filename, "audio/mpeg")
  
subject: Add talking clock via Chromecast.