keras-team/keras · error · ValueError

The `value_range` argument should be a list of two numbers.

Error message

The `value_range` argument should be a list of two numbers. Received: value_range={value_range}

What it means

Error "The `value_range` argument should be a list of two numbers. Received: value_range={value_range}" thrown in keras-team/keras.

Source

Thrown at keras/src/layers/preprocessing/image_preprocessing/random_posterization.py:57

    )

    def __init__(
        self,
        factor,
        value_range=(0, 255),
        data_format=None,
        seed=None,
        **kwargs,
    ):
        super().__init__(data_format=data_format, **kwargs)
        self._set_factor(factor)
        self._set_value_range(value_range)
        self.seed = seed
        self.generator = self.backend.random.SeedGenerator(seed)

    def _set_value_range(self, value_range):
        if not isinstance(value_range, (tuple, list)):
            raise ValueError(
                self._VALUE_RANGE_VALIDATION_ERROR
                + f"Received: value_range={value_range}"
            )
        if len(value_range) != 2:
            raise ValueError(
                self._VALUE_RANGE_VALIDATION_ERROR
                + f"Received: value_range={value_range}"
            )
        self.value_range = sorted(value_range)

    def get_random_transformation(self, data, training=True, seed=None):
        if isinstance(data, dict):
            images = data["images"]
        else:
            images = data
        images_shape = self.backend.shape(images)
        rank = len(images_shape)
        if rank == 3:

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/layers/preprocessing/image_preprocessing/random_posterization.py:57 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/0e98f59a688d507f. Report an issue: GitHub.