lightning/pytorch_lightning/accelerators/ddp_cpu_spawn_backend.py

# Copyright The PyTorch Lightning team.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License
from pytorch_lightning.accelerators.ddp_spawn_backend import DDPSpawnBackend


class DDPCPUSpawnBackend(DDPSpawnBackend):

    def model_to_device(self, model, process_idx, is_master):
        pass

    def get_device_ids(self):
        device_ids = None
        return device_ids