keras-team/keras · error · ValueError

Axis {axis} is out of bounds for input shape {input_shape}.

Error message

Axis {axis} is out of bounds for input shape {input_shape}. Received: axis={self.axis}

What it means

Error "Axis {axis} is out of bounds for input shape {input_shape}. Received: axis={self.axis}" thrown in keras-team/keras.

Source

Thrown at keras/src/layers/normalization/group_normalization.py:228

        normalized_inputs = ops.cast(normalized_inputs, inputs_dtype)

        return normalized_inputs

    def _create_broadcast_shape(self, input_shape):
        broadcast_shape = [1] * len(input_shape)
        broadcast_shape[self.axis] = input_shape[self.axis] // self.groups
        broadcast_shape.insert(self.axis, self.groups)
        return broadcast_shape

    def compute_output_shape(self, input_shape):
        if isinstance(self.axis, int):
            axes = [self.axis]
        else:
            axes = self.axis

        for axis in axes:
            if axis >= len(input_shape) or axis < -len(input_shape):
                raise ValueError(
                    f"Axis {axis} is out of bounds for "
                    f"input shape {input_shape}. "
                    f"Received: axis={self.axis}"
                )
        return input_shape

    def get_config(self):
        config = {
            "groups": self.groups,
            "axis": self.axis,
            "epsilon": self.epsilon,
            "center": self.center,
            "scale": self.scale,
            "beta_initializer": initializers.serialize(self.beta_initializer),
            "gamma_initializer": initializers.serialize(self.gamma_initializer),
            "beta_regularizer": regularizers.serialize(self.beta_regularizer),
            "gamma_regularizer": regularizers.serialize(self.gamma_regularizer),
            "beta_constraint": constraints.serialize(self.beta_constraint),

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/layers/normalization/group_normalization.py:228 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/56f421e3079d1d45. Report an issue: GitHub.