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 2. Received: size={size}

What it means

Error "Invalid `size` argument. Expected an int or a tuple of length 2. Received: size={size}" thrown in keras-team/keras.

Source

Thrown at keras/src/ops/image.py:784

    return _extract_patches_2d(
        images, size, strides, dilation_rate, padding, data_format
    )


def _extract_patches_2d(
    images,
    size,
    strides=None,
    dilation_rate=1,
    padding="valid",
    data_format=None,
):
    if isinstance(size, int):
        patch_h = patch_w = size
    elif len(size) == 2:
        patch_h, patch_w = size[0], size[1]
    else:
        raise TypeError(
            "Invalid `size` argument. Expected an "
            f"int or a tuple of length 2. Received: size={size}"
        )
    data_format = backend.standardize_data_format(data_format)
    if data_format == "channels_last":
        channels_in = images.shape[-1]
    elif data_format == "channels_first":
        channels_in = images.shape[-3]
    if not strides:
        strides = size
    out_dim = patch_h * patch_w * channels_in
    kernel = backend.numpy.eye(out_dim, dtype=images.dtype)
    kernel = backend.numpy.reshape(
        kernel, (patch_h, patch_w, channels_in, out_dim)
    )
    _unbatched = False
    if len(images.shape) == 3:
        _unbatched = True

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/ops/image.py:784 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/5a2b40f97ff0b166. Report an issue: GitHub.