code: def create_backend(type, **kwargs):
      if isinstance(type, Backend):
          return type
  
      if type is None and _has_ray():
          type = RAY
      elif type is None and has_horovodrun():
          type = HOROVOD
  
      return backend_registry[type](**kwargs)
  
file_path: ludwig/ludwig/backend/__init__.py
imports: import contextlib
  import logging
  import os
  from ludwig.api_annotations import DeveloperAPI
  from ludwig.backend.base import Backend, LocalBackend
  from ludwig.utils.horovod_utils import has_horovodrun
label_desc: Use image node_id 6 for calling a global function with example usage: create_backend(type) and returns: backend_registry, type