keras-team/keras · error · NotImplementedError

Model {self.__class__.__name__} does not have a `call()` met

Error message

Model {self.__class__.__name__} does not have a `call()` method implemented.

What it means

Error "Model {self.__class__.__name__} does not have a `call()` method implemented." thrown in keras-team/keras.

Source

Thrown at keras/src/models/model.py:169

            from keras.src.models.functional import Functional

            return Functional.__new__(Functional, *args, **kwargs)
        return typing.cast(cls, super().__new__(cls))

    def __init__(self, *args, **kwargs):
        Trainer.__init__(self)
        from keras.src.models import functional

        # Signature detection for usage of a `Model` subclass
        # as a `Functional` subclass
        if functional_init_arguments(args, kwargs):
            inject_functional_model_class(self.__class__)
            functional.Functional.__init__(self, *args, **kwargs)
        else:
            Layer.__init__(self, *args, **kwargs)

    def call(self, *args, **kwargs):
        raise NotImplementedError(
            f"Model {self.__class__.__name__} does not have a `call()` "
            "method implemented."
        )

    @property
    def layers(self):
        return list(self._flatten_layers(include_self=False, recursive=False))

    @layers.setter
    def layers(self, _):
        raise AttributeError(
            "`Model.layers` attribute is reserved and should not be used. "
            "Please use another name."
        )

    @traceback_utils.filter_traceback
    def get_layer(self, name=None, index=None):
        """Retrieves a layer based on either its name (unique) or index.

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/models/model.py:169 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/c745d2d7c235fa51. Report an issue: GitHub.