new_contents: """
  homeassistant.components.notify.telegram
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Telegram platform for notify component.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/notify.xmpp.html
  """
  import logging
  import urllib
  
  from homeassistant.helpers import validate_config
  from homeassistant.components.notify import (
      DOMAIN, ATTR_TITLE, BaseNotificationService)
  from homeassistant.const import CONF_API_KEY
  
  _LOGGER = logging.getLogger(__name__)
  REQUIREMENTS = ['python-telegram-bot==2.8.7']
  
  
  def get_service(hass, config):
      """ Get the Telegram notification service. """
  
      if not validate_config(config,
                             {DOMAIN: [CONF_API_KEY, 'chat_id']},
                             _LOGGER):
          return None
  
      try:
          import telegram
      except ImportError:
          _LOGGER.exception(
              "Unable to import python-telegram-bot. "
              "Did you maybe not install the 'python-telegram-bot' package?")
          return None
  
      try:
          bot = telegram.Bot(token=config[DOMAIN][CONF_API_KEY])
          username = bot.getMe()['username']
          _LOGGER.info("Telegram bot is' %s'", username)
      except urllib.error.HTTPError:
          _LOGGER.error("Please check your access token.")
          return None
  
      return TelegramNotificationService(
          config[DOMAIN][CONF_API_KEY],
          config[DOMAIN]['chat_id'])
  
  
  # pylint: disable=too-few-public-methods
  class TelegramNotificationService(BaseNotificationService):
      """ Implements notification service for Telegram. """
  
      def __init__(self, api_key, chat_id):
          import telegram
          self._api_key = api_key
          self._chat_id = chat_id
          self.bot = telegram.Bot(token=self._api_key)
  
      def send_message(self, message="", **kwargs):
          """ Send a message to a user. """
  
          title = kwargs.get(ATTR_TITLE)
  
          self.bot.sendMessage(chat_id=self._chat_id,
                               text=title + "  " + message)
  
subject: Add telegram notifier