def delete(self, entity):
    key = _normalize_key(entity)
    if key is None:
      return self.ndb_delete(entity)
    self.deletes.append(key)
Registers entity to delete from datastore.
dataset/ETHPy150Open GoogleCloudPlatform/appengine-mapreduce/python/src/mapreduce/context.py/_MutationPool.delete