code: def averageSeriesWithWildcards(requestContext, seriesList, *positions):
      
      matchedList = defaultdict(list)
      for series in seriesList:
          newname = '.'.join(map(lambda x: x[1],
                                 filter(lambda i: i[0] not in positions,
                                        enumerate(series.name.split('.')))))
          matchedList[newname].append(series)
      result = []
      for name in matchedList:
          [series] = averageSeries(requestContext, (matchedList[name]))
          series.name = name
          result.append(series)
      return result
docs: Call averageSeries after inserting wildcards at the given position(s).
  
      Example::
  
          &target=averageSeriesWithWildcards(
              host.cpu-[0-7].cpu-{user,system}.value, 1)
  
      This would be the equivalent of::
  
          &target=averageSeries(host.*.cpu-user.value)&target=averageSeries(
              host.*.cpu-system.value)