keras-team/keras · error · ValueError

meshgrid requires at least 2 input arrays. Received: {len(x)

Error message

meshgrid requires at least 2 input arrays. Received: {len(x)} input array(s).

What it means

Error "meshgrid requires at least 2 input arrays. Received: {len(x)} input array(s)." thrown in keras-team/keras.

Source

Thrown at keras/src/backend/openvino/numpy.py:3120

    # Handle keepdims
    if keepdims:
        if flattened_all:
            # When axis=None, keepdims should restore all dimensions as 1
            ones_shape = ov_opset.constant(
                [1] * original_rank, Type.i32
            ).output(0)
            median_result = ov_opset.reshape(
                median_result, ones_shape, False
            ).output(0)
        else:
            median_result = ov_opset.unsqueeze(median_result, [axis]).output(0)

    return OpenVINOKerasTensor(median_result)


def meshgrid(*x, indexing="xy"):
    if len(x) < 2:
        raise ValueError(
            "meshgrid requires at least 2 input arrays. "
            f"Received: {len(x)} input array(s)."
        )
    if indexing not in ("xy", "ij"):
        raise ValueError("indexing must be either 'xy' or 'ij'")

    tensors = [get_ov_output(xi) for xi in x]
    n = len(tensors)

    shapes = [
        ov_opset.shape_of(t, Type.i64).output(0) for t in tensors
    ]  # each is [Ni]
    one = ov_opset.constant([1], Type.i64).output(0)

    if indexing == "xy":
        shape_list = [shapes[1], shapes[0]] + shapes[2:]
        out_shape = ov_opset.concat(shape_list, axis=0).output(0)
    else:

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/backend/openvino/numpy.py:3120 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/3c96540a13e14e21. Report an issue: GitHub.