keras-team/keras · error · NotImplementedError

Could not extract num value from tensor

Error message

Could not extract num value from tensor

What it means

Error "Could not extract num value from tensor" thrown in keras-team/keras.

Source

Thrown at keras/src/backend/openvino/numpy.py:2675

    If `retstep` is True, also returns the step size between values.

    """

    start = get_ov_output(start)
    stop = get_ov_output(stop)

    if hasattr(num, "output") or isinstance(num, OpenVINOKerasTensor):
        num_tensor = get_ov_output(num)
        try:
            if num_tensor.get_node().get_type_name() == "Constant":
                num_value = num_tensor.get_node().get_vector()[0]
                num = int(num_value)
            else:
                raise NotImplementedError(
                    "Dynamic num values not fully supported"
                )
        except Exception as e:
            raise NotImplementedError(
                "Could not extract num value from tensor"
            ) from e
    else:
        num = int(num)

    if dtype is None:
        output_type = OPENVINO_DTYPES[config.floatx()]
    else:
        output_type = OPENVINO_DTYPES[dtype]

    start = ov_opset.convert(start, output_type).output(0)
    stop = ov_opset.convert(stop, output_type).output(0)

    if num < 0:
        raise ValueError("Number of samples, `num`, must be non-negative.")

    if num == 0:
        empty_shape = ov_opset.constant([0], Type.i32).output(0)

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/backend/openvino/numpy.py:2675 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of keras-team/keras@7a34a03db6 (2026-08-25). Data as JSON: /api/errors/74c174e3030b96e6. Report an issue: GitHub.