def get_results(self):
        """Returns results

        The processing is done on the get_results caller thread if the results queue is empty

        :return: arguments passed to publish_func(...) by a worker
        """

        if self._results_queue:
            # We have already calculated result. Just return it
            return self._results_queue.pop(0)
        else:
            # If we don't have any tasks waiting for processing, then indicate empty queue
            while self._ventilator_queue or (self._ventilator and not self._ventilator.completed()):

                # To prevent a race condition of the ventilator working but not yet placing an item
                # on the ventilator queue. We block until something is on the ventilator queue.
                while not self._ventilator_queue:
                    sleep(.1)

                # If we do have some tasks, then process a task from the head of a queue
                args, kargs = self._ventilator_queue.pop(0)
                self._worker.process(*args, **kargs)

                if self._ventilator:
                    self._ventilator.processed_item()

                if self._results_queue:
                    return self._results_queue.pop(0)

            raise EmptyResultError()
Returns results

        The processing is done on the get_results caller thread if the results queue is empty

        :return: arguments passed to publish_func(...) by a worker
        
petastorm/workers_pool/dummy_pool.py