keras-team/keras · error · NotImplementedError

Unknown `fill_mode` {fill_mode}. Expected of one {self._SUPP

Error message

Unknown `fill_mode` {fill_mode}. Expected of one {self._SUPPORTED_FILL_MODE}.

What it means

Error "Unknown `fill_mode` {fill_mode}. Expected of one {self._SUPPORTED_FILL_MODE}." thrown in keras-team/keras.

Source

Thrown at keras/src/layers/preprocessing/image_preprocessing/random_shear.py:98

    _SUPPORTED_INTERPOLATION = ("nearest", "bilinear")

    def __init__(
        self,
        x_factor=0.0,
        y_factor=0.0,
        interpolation="bilinear",
        fill_mode="reflect",
        fill_value=0.0,
        data_format=None,
        seed=None,
        **kwargs,
    ):
        super().__init__(data_format=data_format, **kwargs)
        self.x_factor = self._set_factor_with_name(x_factor, "x_factor")
        self.y_factor = self._set_factor_with_name(y_factor, "y_factor")

        if fill_mode not in self._SUPPORTED_FILL_MODE:
            raise NotImplementedError(
                f"Unknown `fill_mode` {fill_mode}. Expected of one "
                f"{self._SUPPORTED_FILL_MODE}."
            )
        if interpolation not in self._SUPPORTED_INTERPOLATION:
            raise NotImplementedError(
                f"Unknown `interpolation` {interpolation}. Expected of one "
                f"{self._SUPPORTED_INTERPOLATION}."
            )

        self.fill_mode = fill_mode
        self.fill_value = fill_value
        self.interpolation = interpolation
        self.seed = seed
        self.generator = SeedGenerator(seed)
        self.supports_jit = False

    def _set_factor_with_name(self, factor, factor_name):
        if isinstance(factor, (tuple, list)):

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/layers/preprocessing/image_preprocessing/random_shear.py:98 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/1ad9838746e55c32. Report an issue: GitHub.