@classmethod
  def shard_id_from_number(cls, mapreduce_id, shard_number):
    return "%s-%d" % (mapreduce_id, shard_number)
Get shard id by mapreduce id and shard number.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/mapreduce/model.py/ShardState.shard_id_from_number