def PurgeQueue_Rpc(self, request, response):
    self._CheckQueueForRpc(request.queue_name())
    self._queues[request.queue_name()].PurgeQueue()
use np.unique to get integer group indices for product, intersection
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/api/taskqueue/taskqueue_stub.py/_Group.PurgeQueue_Rpc--crossover with--dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/tools/grouputils.py/combine_indices