keras-team/keras · error · ValueError

Unknown type of input data {type(data)}

Error message

Unknown type of input data {type(data)}

What it means

Error "Unknown type of input data {type(data)}" thrown in keras-team/keras.

Source

Thrown at keras/src/backend/openvino/trainer.py:129

                param_elem = self._parameterize_data(elem)
                parametrize_data[elem_name] = param_elem
        elif isinstance(data, OpenVINOKerasTensor):
            parametrize_data = data
        elif isinstance(data, np.ndarray) or np.isscalar(data):
            ov_type = OPENVINO_DTYPES[str(data.dtype)]
            ov_shape = list(data.shape)
            if len(ov_shape) > 0:
                ov_shape[0] = -1
            param = ov_opset.parameter(shape=ov_shape, dtype=ov_type)
            parametrize_data = OpenVINOKerasTensor(param.output(0))
        elif isinstance(data, int):
            param = ov_opset.parameter(shape=[], dtype=ov.Type.i32)
            parametrize_data = OpenVINOKerasTensor(param.output(0))
        elif isinstance(data, float):
            param = ov_opset.parameter(shape=[], dtype=ov.Type.f32)
            parametrize_data = OpenVINOKerasTensor(param.output(0))
        else:
            raise ValueError(f"Unknown type of input data {type(data)}")
        return parametrize_data

    def _get_data_shapes(self, data):
        shapes = []
        for x in tree.flatten(data):
            if isinstance(x, np.ndarray):
                shape = (-1,) + x.shape[1:] if x.ndim > 0 else x.shape
                shapes.append(shape)
            else:
                shapes.append(None)
        return shapes

    def _get_compiled_model(self, data):
        current_shapes = self._get_data_shapes(data)
        if (
            self.ov_compiled_model is not None
            and get_device() == self.ov_device
            and getattr(self, "ov_input_shapes", None) == current_shapes

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/backend/openvino/trainer.py:129 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/e08d8d21e15f9fd3. Report an issue: GitHub.