estimator ========================================================== .. py:module:: evalml.pipelines.components.estimators.estimator .. autoapi-nested-parse:: A component that fits and predicts given data. Module Contents --------------- Classes Summary ~~~~~~~~~~~~~~~ .. autoapisummary:: evalml.pipelines.components.estimators.estimator.Estimator Contents ~~~~~~~~~~~~~~~~~~~ .. py:class:: Estimator(parameters: dict = None, component_obj: Type[evalml.pipelines.components.ComponentBase] = None, random_seed: Union[int, float] = 0, **kwargs) A component that fits and predicts given data. To implement a new Estimator, define your own class which is a subclass of Estimator, including a name and a list of acceptable ranges for any parameters to be tuned during the automl search (hyperparameters). Define an `__init__` method which sets up any necessary state and objects. Make sure your `__init__` only uses standard keyword arguments and calls `super().__init__()` with a parameters dict. You may also override the `fit`, `transform`, `fit_transform` and other methods in this class if appropriate. To see some examples, check out the definitions of any Estimator component subclass. :param parameters: Dictionary of parameters for the component. Defaults to None. :type parameters: dict :param component_obj: Third-party objects useful in component implementation. Defaults to None. :type component_obj: obj :param random_seed: Seed for the random number generator. Defaults to 0. :type random_seed: int **Attributes** .. list-table:: :widths: 15 85 :header-rows: 0 * - **model_family** - ModelFamily.NONE * - **modifies_features** - True * - **modifies_target** - False * - **training_only** - False **Methods** .. autoapisummary:: :nosignatures: evalml.pipelines.components.estimators.estimator.Estimator.clone evalml.pipelines.components.estimators.estimator.Estimator.default_parameters evalml.pipelines.components.estimators.estimator.Estimator.describe evalml.pipelines.components.estimators.estimator.Estimator.feature_importance evalml.pipelines.components.estimators.estimator.Estimator.fit evalml.pipelines.components.estimators.estimator.Estimator.get_prediction_intervals evalml.pipelines.components.estimators.estimator.Estimator.load evalml.pipelines.components.estimators.estimator.Estimator.model_family evalml.pipelines.components.estimators.estimator.Estimator.name evalml.pipelines.components.estimators.estimator.Estimator.needs_fitting evalml.pipelines.components.estimators.estimator.Estimator.parameters evalml.pipelines.components.estimators.estimator.Estimator.predict evalml.pipelines.components.estimators.estimator.Estimator.predict_proba evalml.pipelines.components.estimators.estimator.Estimator.save evalml.pipelines.components.estimators.estimator.Estimator.supported_problem_types evalml.pipelines.components.estimators.estimator.Estimator.update_parameters .. py:method:: clone(self) Constructs a new component with the same parameters and random state. :returns: A new instance of this component with identical parameters and random state. .. py:method:: default_parameters(cls) Returns the default parameters for this component. Our convention is that Component.default_parameters == Component().parameters. :returns: Default parameters for this component. :rtype: dict .. py:method:: describe(self, print_name=False, return_dict=False) Describe a component and its parameters. :param print_name: whether to print name of component :type print_name: bool, optional :param return_dict: whether to return description as dictionary in the format {"name": name, "parameters": parameters} :type return_dict: bool, optional :returns: Returns dictionary if return_dict is True, else None. :rtype: None or dict .. py:method:: feature_importance(self) -> pandas.Series :property: Returns importance associated with each feature. :returns: Importance associated with each feature. :rtype: np.ndarray :raises MethodPropertyNotFoundError: If estimator does not have a feature_importance method or a component_obj that implements feature_importance. .. py:method:: fit(self, X: pandas.DataFrame, y: Optional[pandas.Series] = None) Fits estimator to data. :param X: The input training data of shape [n_samples, n_features]. :type X: pd.DataFrame :param y: The target training data of length [n_samples]. :type y: pd.Series, optional :returns: self .. py:method:: get_prediction_intervals(self, X: pandas.DataFrame, y: Optional[pandas.Series] = None, coverage: List[float] = None) -> Dict[str, pandas.Series] Find the prediction intervals using the fitted regressor. This function takes the predictions of the fitted estimator and calculates the rolling standard deviation across all predictions using a window size of 5. The lower and upper predictions are determined by taking the percent point (quantile) function of the lower tail probability at each bound multiplied by the rolling standard deviation. :param X: Data of shape [n_samples, n_features]. :type X: pd.DataFrame :param y: Target data. Ignored. :type y: pd.Series :param coverage: A list of floats between the values 0 and 1 that the upper and lower bounds of the prediction interval should be calculated for. :type coverage: list[float] :returns: Prediction intervals, keys are in the format {coverage}_lower or {coverage}_upper. :rtype: dict :raises MethodPropertyNotFoundError: If the estimator does not support Time Series Regression as a problem type. .. py:method:: load(file_path) :staticmethod: Loads component at file path. :param file_path: Location to load file. :type file_path: str :returns: ComponentBase object .. py:method:: model_family(cls) :property: Returns ModelFamily of this component. .. py:method:: name(cls) :property: Returns string name of this component. .. py:method:: needs_fitting(self) Returns boolean determining if component needs fitting before calling predict, predict_proba, transform, or feature_importances. This can be overridden to False for components that do not need to be fit or whose fit methods do nothing. :returns: True. .. py:method:: parameters(self) :property: Returns the parameters which were used to initialize the component. .. py:method:: predict(self, X: pandas.DataFrame) -> pandas.Series Make predictions using selected features. :param X: Data of shape [n_samples, n_features]. :type X: pd.DataFrame :returns: Predicted values. :rtype: pd.Series :raises MethodPropertyNotFoundError: If estimator does not have a predict method or a component_obj that implements predict. .. py:method:: predict_proba(self, X: pandas.DataFrame) -> pandas.Series Make probability estimates for labels. :param X: Features. :type X: pd.DataFrame :returns: Probability estimates. :rtype: pd.Series :raises MethodPropertyNotFoundError: If estimator does not have a predict_proba method or a component_obj that implements predict_proba. .. py:method:: save(self, file_path, pickle_protocol=cloudpickle.DEFAULT_PROTOCOL) Saves component at file path. :param file_path: Location to save file. :type file_path: str :param pickle_protocol: The pickle data stream format. :type pickle_protocol: int .. py:method:: supported_problem_types(cls) :property: Problem types this estimator supports. .. py:method:: update_parameters(self, update_dict, reset_fit=True) Updates the parameter dictionary of the component. :param update_dict: A dict of parameters to update. :type update_dict: dict :param reset_fit: If True, will set `_is_fitted` to False. :type reset_fit: bool, optional