def trigger_epoch(self):
        self._trigger_epoch()
        self.epoch_num += 1
Delete all the local data about VMs.
dataset/ETHPy150Open ppwwyyxx/tensorpack/tensorpack/callbacks/base.py/Callback.trigger_epoch--crossover with--dataset/ETHPy150Open beloglazov/openstack-neat/neat/locals/collector.py/cleanup_all_local_data