keras-team/keras · error · ValueError

Provide either a layer name or layer index at `get_layer`.

Error message

Provide either a layer name or layer index at `get_layer`.

What it means

Error "Provide either a layer name or layer index at `get_layer`." thrown in keras-team/keras.

Source

Thrown at keras/src/models/model.py:222

        if index is not None:
            if len(self.layers) <= index:
                raise ValueError(
                    f"Was asked to retrieve layer at index {index}"
                    f" but model only has {len(self.layers)}"
                    " layers."
                )
            else:
                return self.layers[index]

        if name is not None:
            for layer in self.layers:
                if layer.name == name:
                    return layer
            raise ValueError(
                f"No such layer: {name}. Existing layers are: "
                f"{list(layer.name for layer in self.layers)}."
            )
        raise ValueError(
            "Provide either a layer name or layer index at `get_layer`."
        )

    @traceback_utils.filter_traceback
    def summary(
        self,
        line_length=None,
        positions=None,
        print_fn=None,
        expand_nested=False,
        show_trainable=False,
        layer_range=None,
    ):
        """Prints a string summary of the network.

        Args:
            line_length: Total length of printed lines
                (e.g. set this to adapt the display to different

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/models/model.py:222 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/a17129b361b9f514. Report an issue: GitHub.