{"record":{"id":"91de87a228c43a5d","repo":"keras-team/keras","slug":"unable-to-import-backend-backend","errorCode":null,"errorMessage":"Unable to import backend : {backend()}","messagePattern":"Unable to import backend : (.+?)","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"keras/src/backend/__init__.py","lineNumber":57,"sourceCode":"    from keras.src.backend.tensorflow.core import Variable as BackendVariable\nelif backend() == \"jax\":\n    from keras.src.backend.jax import *  # noqa: F403\n    from keras.src.backend.jax.core import Variable as BackendVariable\nelif backend() == \"torch\":\n    from keras.src.backend.torch import *  # noqa: F403\n    from keras.src.backend.torch.core import Variable as BackendVariable\nelif backend() == \"numpy\":\n    from keras.src.backend.numpy import *  # noqa: F403\n    from keras.src.backend.numpy.core import Variable as BackendVariable\n\n    distribution_lib = None\nelif backend() == \"openvino\":\n    from keras.src.backend.openvino import *  # noqa: F403\n    from keras.src.backend.openvino.core import Variable as BackendVariable\n\n    distribution_lib = None\nelse:\n    raise ValueError(f\"Unable to import backend : {backend()}\")\n\n\n@keras_export(\"keras.Variable\")\nclass Variable(BackendVariable):  # noqa: F811\n    pass\n\n\nbackend_name_scope = name_scope  # noqa: F405\n\n\n@keras_export(\"keras.name_scope\")\nclass name_scope(backend_name_scope):\n    pass\n\n\n@keras_export(\"keras.device\")\ndef device(device_name):\n    \"\"\"Context manager for backend-agnostic device placement.","sourceCodeStart":39,"sourceCodeEnd":75,"githubUrl":"https://github.com/keras-team/keras/blob/7a34a03db60bf60042242d6a556fc3be119046a5/keras/src/backend/__init__.py#L39-L75","documentation":"Error \"Unable to import backend : {backend()}\" thrown in keras-team/keras.","triggerScenarios":"Thrown at keras/src/backend/__init__.py:57 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"7a34a03db60bf60042242d6a556fc3be119046a5","analyzedAt":"2026-08-25T21:25:25.994Z","schemaVersion":2},"datasetVersion":"2026-08-26T02:17:13.382Z"}