{"record":{"id":"db8ac1daf8bbf8c4","repo":"keras-team/keras","slug":"unsupported-value-sparse-true-with-numpy-backend-db8ac1","errorCode":null,"errorMessage":"Unsupported value `sparse=True` with numpy backend","messagePattern":"Unsupported value `sparse=True` with numpy backend","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"keras/src/backend/numpy/numpy.py","lineNumber":365,"sourceCode":"    x2 = convert_to_tensor(x2)\n\n    dtype = dtypes.result_type(x1.dtype, x2.dtype)\n    if dtype in [\"int8\", \"int16\", \"int32\", \"uint8\", \"uint16\", \"uint32\"]:\n        dtype = config.floatx()\n    elif dtype in [\"int64\"]:\n        dtype = \"float64\"\n\n    return np.heaviside(x1, x2).astype(dtype)\n\n\ndef kaiser(x, beta):\n    x = convert_to_tensor(x)\n    return np.kaiser(x, beta).astype(config.floatx())\n\n\ndef bincount(x, weights=None, minlength=0, sparse=False):\n    if sparse:\n        raise ValueError(\"Unsupported value `sparse=True` with numpy backend\")\n    x = convert_to_tensor(x)\n    dtypes_to_resolve = [x.dtype]\n    if weights is not None:\n        weights = convert_to_tensor(weights)\n        dtypes_to_resolve.append(weights.dtype)\n        dtype = dtypes.result_type(*dtypes_to_resolve)\n    else:\n        dtype = \"int32\"\n    if len(x.shape) == 2:\n        if weights is None:\n\n            def bincount_fn(arr):\n                return np.bincount(arr, minlength=minlength)\n\n            bincounts = list(map(bincount_fn, x))\n        else:\n\n            def bincount_fn(arr_w):","sourceCodeStart":347,"sourceCodeEnd":383,"githubUrl":"https://github.com/keras-team/keras/blob/7a34a03db60bf60042242d6a556fc3be119046a5/keras/src/backend/numpy/numpy.py#L347-L383","documentation":"Error \"Unsupported value `sparse=True` with numpy backend\" thrown in keras-team/keras.","triggerScenarios":"Thrown at keras/src/backend/numpy/numpy.py:365 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"}