code: def zone_helper(zone):
      
      if zone is None:
          return None
      elif isinstance(zone, Zone):
          return zone.href
      elif zone.startswith('http'):
          return zone
      return Zone.get_or_create(name=zone).href
docs: Zone finder by name. If zone doesn't exist, create it and
      return the href
  
      :param str zone: name of zone (if href, will be returned as is)
      :return str href: href of zone