code: def notify_telegram(title, content, token=None, chat=None, mention_user=None, **kwargs):
      
      # test import
      import telegram  # noqa: F401
  
      cfg = Config.instance()
  
      # get default token and chat
      if not token:
          token = cfg.get_expanded("notifications", "telegram_token")
      if not chat:
          chat = cfg.get_expanded("notifications", "telegram_chat")
  
      if not token or not chat:
          logger.warning("cannot send Telegram notification, token ({}) or chat ({}) empty".format(
              token, chat))
          return False
  
      # append the user to mention to the title
      # unless explicitly set to empty string
      mention_text = ""
      if mention_user is None:
          mention_user = cfg.get_expanded("notifications", "telegram_mention_user")
      if mention_user:
          mention_text = " (@{})".format(mention_user)
  
      # request data for the API call
      request = {
          "parse_mode": "Markdown",
      }
  
      # standard or attachment content?
      if isinstance(content, six.string_types):
          request["text"] = "{}{}\n\n{}".format(title, mention_text, content)
      else:
          # content is a dict, add some formatting
          request["text"] = "{}{}\n\n".format(title, mention_text)
  
          for key, value in content.items():
              request["text"] += "_{}_: {}\n".format(key, value)
  
      # extend by arbitrary kwargs
      request.update(kwargs)
  
      # threaded, non-blocking API communication
      thread = threading.Thread(target=_notify_telegram, args=(token, chat, request))
      thread.start()
  
      return True
docs: Sends a telegram notification and returns *True* on success. The communication with the telegram
      API might have some delays and is therefore handled by a thread.