def _GetPercentileList(items, percentilelist):
  if not items:
    return None
  sortedlist = sorted(items)
  return [_GetPercentile(sortedlist, p) for p in percentilelist]
Given a list, returns a list of desired percentile values.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/analytics/process.py/_GetPercentileList