code: def initialize_backend(backend):
      if isinstance(backend, dict):
          backend = create_backend(**backend)
      else:
          backend = create_backend(backend)
      backend.initialize()
      return backend
  
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 7 for calling a global function with example usage: initialize_backend(backend) and returns: backend