code: def import_backend(config):
      
      backend_name = config['backend']
      path = backend_name.split('.')
      backend_mod_name, backend_class_name = '.'.join(path[:-1]), path[-1]
      backend_mod = importlib.import_module(backend_mod_name)
      backend_class = getattr(backend_mod, backend_class_name)
      return backend_class(config['settings'])
docs: Imports and initializes the Backend class.