keras-team/keras · error · ValueError

You need to set either `num_bins` or `bin_boundaries`.

Error message

You need to set either `num_bins` or `bin_boundaries`.

What it means

Error "You need to set either `num_bins` or `bin_boundaries`." thrown in keras-team/keras.

Source

Thrown at keras/src/layers/preprocessing/discretization.py:137

                "count",
            ),
            caller_name=self.__class__.__name__,
            arg_name="output_mode",
        )

        if num_bins is not None and num_bins < 0:
            raise ValueError(
                "`num_bins` must be greater than or equal to 0. "
                f"Received: `num_bins={num_bins}`"
            )
        if num_bins is not None and bin_boundaries is not None:
            raise ValueError(
                "Both `num_bins` and `bin_boundaries` should not be set. "
                f"Received: `num_bins={num_bins}` and "
                f"`bin_boundaries={bin_boundaries}`"
            )
        if num_bins is None and bin_boundaries is None:
            raise ValueError(
                "You need to set either `num_bins` or `bin_boundaries`."
            )

        self.bin_boundaries = bin_boundaries
        self.num_bins = num_bins
        self.epsilon = epsilon
        self.output_mode = output_mode
        self.sparse = sparse

        if self.bin_boundaries:
            self.summary = None
        else:
            self.summary = np.array([[], []], dtype="float32")

    @property
    def input_dtype(self):
        return backend.floatx()

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/layers/preprocessing/discretization.py:137 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/3cd03d81d7499786. Report an issue: GitHub.