code: def _mangle_prefix(res):
      
      # fugly cast from large numbers to string to deal with XML-RPC
      res['total_addresses'] = unicode(res['total_addresses'])
      res['used_addresses'] = unicode(res['used_addresses'])
      res['free_addresses'] = unicode(res['free_addresses'])
  
      # postgres has notion of infinite while datetime hasn't, if expires
      # is equal to the max datetime we assume it is infinity and instead
      # represent that as None
      if res['expires'].tzinfo is None:
          res['expires'] = pytz.utc.localize(res['expires'])
      if res['expires'] == pytz.utc.localize(datetime.datetime.max):
          res['expires'] = None
  
      return res
docs: Mangle prefix result