keras-team/keras · error · ValueError

Invalid value for argument `interpolation`. Expected of one

Error message

Invalid value for argument `interpolation`. Expected of one {set(AFFINE_TRANSFORM_INTERPOLATIONS.keys())}. Received: interpolation={interpolation}

What it means

Error "Invalid value for argument `interpolation`. Expected of one {set(AFFINE_TRANSFORM_INTERPOLATIONS.keys())}. Received: interpolation={interpolation}" thrown in keras-team/keras.

Source

Thrown at keras/src/backend/numpy/ops/image.py:560

        output = np.moveaxis(output, -1, d)

    if use_rounding:
        output = np.clip(np.round(output), x.min(), x.max())
        output = output.astype(x.dtype)
    return output


def affine_transform(
    images,
    transform,
    interpolation="bilinear",
    fill_mode="constant",
    fill_value=0,
    data_format=None,
):
    data_format = standardize_data_format(data_format)
    if interpolation not in AFFINE_TRANSFORM_INTERPOLATIONS.keys():
        raise ValueError(
            "Invalid value for argument `interpolation`. Expected of one "
            f"{set(AFFINE_TRANSFORM_INTERPOLATIONS.keys())}. Received: "
            f"interpolation={interpolation}"
        )
    if fill_mode not in AFFINE_TRANSFORM_FILL_MODES:
        raise ValueError(
            "Invalid value for argument `fill_mode`. Expected of one "
            f"{AFFINE_TRANSFORM_FILL_MODES}. Received: fill_mode={fill_mode}"
        )

    images = convert_to_tensor(images)
    transform = convert_to_tensor(transform)

    if len(images.shape) not in (3, 4):
        raise ValueError(
            "Invalid images rank: expected rank 3 (single image) "
            "or rank 4 (batch of images). Received input with shape: "
            f"images.shape={images.shape}"

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/backend/numpy/ops/image.py:560 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/2bef6686349a13f4. Report an issue: GitHub.