new_contents: 
  from gi.repository import Notify
  
  if not Notify.init("i3pystatus"):
      raise ImportError("Couldn't initialize libnotify")
  
  URGENCY_LUT = (
      Notify.Urgency.LOW,
      Notify.Urgency.NORMAL,
      Notify.Urgency.CRITICAL,
  )
  
  # List of some useful icon names:
  # battery, battery-caution, battery-low
  # …
  
  def display_notification(title, body, icon="dialog-information", urgency=1, timeout=0):
      notification = Notify.Notification.new(title, body, icon)
      if timeout:
          notification.set_timeout(timeout)
      notification.set_urgency(URGENCY_LUT[urgency])
      return notification.show()
  
subject: Add slim wrapper for notifications