code: def load_backends(self):
      
      for name, backend_settings in settings.storage.iteritems():
        backend_path = backend_settings['backend']
        backend_module, backend_cls = backend_path.rsplit('.', 1)
        backend_module = import_module(backend_module)
        # Create an instance of the configured backend.
        backend_constructor = getattr(backend_module, backend_cls)
        self.backends[name] = backend_constructor(name,
                                                  self.namespaces,
                                                  **backend_settings)
docs: Loads all the backends setup in settings.py.