code: def _build_list_params(self, params, items, label):
          
          if isinstance(items, basestring):
              items = [items]
          for i in range(1, len(items) + 1):
              params['%s.%d' % (label, i)] = items[i - 1]
docs: Add an AWS API-compatible parameter list to a dictionary.
  
          :type params: dict
          :param params: The parameter dictionary
  
          :type items: list
          :param items: Items to be included in the list
  
          :type label: string
          :param label: The parameter list's name