keras-team/keras · error · TypeError

Invalid `size` argument. Expected an int or a tuple of lengt

Error message

Invalid `size` argument. Expected an int or a tuple of length 3. Received: size={size}

What it means

Error "Invalid `size` argument. Expected an int or a tuple of length 3. Received: size={size}" thrown in keras-team/keras.

Source

Thrown at keras/src/ops/image.py:830

    if _unbatched:
        patches = backend.numpy.squeeze(patches, axis=0)
    return patches


def _extract_patches_3d(
    volumes,
    size,
    strides=None,
    dilation_rate=1,
    padding="valid",
    data_format=None,
):
    if isinstance(size, int):
        patch_d = patch_h = patch_w = size
    elif len(size) == 3:
        patch_d, patch_h, patch_w = size
    else:
        raise TypeError(
            "Invalid `size` argument. Expected an "
            f"int or a tuple of length 3. Received: size={size}"
        )
    if strides is None:
        strides = size
    if isinstance(strides, int):
        strides = (strides, strides, strides)
    if len(strides) != 3:
        raise ValueError(f"Invalid `strides` argument. Got: {strides}")
    data_format = backend.standardize_data_format(data_format)
    if data_format == "channels_last":
        channels_in = volumes.shape[-1]
    elif data_format == "channels_first":
        channels_in = volumes.shape[-4]
    out_dim = patch_d * patch_w * patch_h * channels_in
    kernel = backend.numpy.eye(out_dim, dtype=volumes.dtype)
    kernel = backend.numpy.reshape(
        kernel, (patch_d, patch_h, patch_w, channels_in, out_dim)

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/ops/image.py:830 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/ed1be6d69b26b103. Report an issue: GitHub.