keras-team/keras · error · ValueError

Argument `size` must be a tuple of two elements (height, wid

Error message

Argument `size` must be a tuple of two elements (height, width). Received: size={size}

What it means

Error "Argument `size` must be a tuple of two elements (height, width). Received: size={size}" thrown in keras-team/keras.

Source

Thrown at keras/src/backend/tensorflow/image.py:168

):
    data_format = backend.standardize_data_format(data_format)
    if interpolation not in RESIZE_INTERPOLATIONS:
        raise ValueError(
            "Invalid value for argument `interpolation`. Expected of one "
            f"{RESIZE_INTERPOLATIONS}. Received: interpolation={interpolation}"
        )
    if fill_mode != "constant":
        raise ValueError(
            "Invalid value for argument `fill_mode`. Only `'constant'` "
            f"is supported. Received: fill_mode={fill_mode}"
        )
    if pad_to_aspect_ratio and crop_to_aspect_ratio:
        raise ValueError(
            "Only one of `pad_to_aspect_ratio` & `crop_to_aspect_ratio` "
            "can be `True`."
        )
    if not len(size) == 2:
        raise ValueError(
            "Argument `size` must be a tuple of two elements "
            f"(height, width). Received: size={size}"
        )
    size = tuple(size)
    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}"
        )
    if data_format == "channels_first":
        if len(images.shape) == 4:
            images = tf.transpose(images, (0, 2, 3, 1))
        else:
            images = tf.transpose(images, (1, 2, 0))

    if crop_to_aspect_ratio:
        shape = tf.shape(images)

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/backend/tensorflow/image.py:168 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/9a0a54eec3d9d5b5. Report an issue: GitHub.