# Motivation
The distributed APIs rely on backend names for creation of process group.
To abstract out references of these names from PG creation, an API is added to get default distributed backend for device.
The device code would need to register its device and backend via ```torch.distributed.Backend.register_backend``` or update the map ``` torch.distributed.Backend.default_device_backend_map["device"] = "distributed_backend" ``` prior to using the API.
An example of use is added in the test file ( which can be used to check abstracted APIs)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/140536
Approved by: https://github.com/kwen2501
