Return the backend of the given process group.
get_backendin non-distributed environment will return None.
group (ProcessGroup, optional) – The process group to work on. The default is the general main process group. If another specific group is specified, the calling process must be part of
group. Defaults to None.
Return the backend of the given process group as a lower case string if in distributed environment, otherwise None.
- Return type
str or None