Source code for ibm_watson_machine_learning.experiment.autoai.autoai

# (C) Copyright IBM Corp. 2020.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# See the License for the specific language governing permissions and
# limitations under the License.

import copy
from typing import List, Union

from ibm_watson_machine_learning.preprocessing import DataJoinGraph
from ibm_watson_machine_learning.utils.autoai.enums import (
    TShirtSize, ClassificationAlgorithms, RegressionAlgorithms, ForecastingAlgorithms, PredictionType, Metrics,\
    Transformers, DataConnectionTypes, PipelineTypes, PositiveLabelClass)
from ibm_watson_machine_learning.utils.autoai.errors import LocalInstanceButRemoteParameter, MissingPositiveLabel, \
    NonForecastPredictionColumnMissing, ForecastPredictionColumnsMissing, ForecastingCannotBeRunAsLocalScenario, \
    TSNotSupported, ParamOutOfRange
from ibm_watson_machine_learning.utils.autoai.utils import check_dependencies_versions, \
    validate_additional_params_for_optimizer, validate_optimizer_enum_values
from ibm_watson_machine_learning.workspace import WorkSpace
from .engines import WMLEngine
from .optimizers import LocalAutoPipelines, RemoteAutoPipelines
from .runs import AutoPipelinesRuns, LocalAutoPipelinesRuns
from ..base_experiment.base_experiment import BaseExperiment

__all__ = [

[docs]class AutoAI(BaseExperiment): """ AutoAI class for pipeline models optimization automation. Parameters ---------- wml_credentials: dictionary, required Credentials to Watson Machine Learning instance. project_id: str, optional ID of the Watson Studio project. space_id: str, optional ID of the Watson Studio Space. Example ------- >>> from ibm_watson_machine_learning.experiment import AutoAI >>> >>> experiment = AutoAI( >>> wml_credentials={ >>> "apikey": "...", >>> "iam_apikey_description": "...", >>> "iam_apikey_name": "...", >>> "iam_role_crn": "...", >>> "iam_serviceid_crn": "...", >>> "instance_id": "...", >>> "url": "" >>> }, >>> project_id="...", >>> space_id="...") """ # note: initialization of AutoAI enums as class properties ClassificationAlgorithms = ClassificationAlgorithms RegressionAlgorithms = RegressionAlgorithms ForecastingAlgorithms = ForecastingAlgorithms TShirtSize = TShirtSize PredictionType = PredictionType Metrics = Metrics Transformers = Transformers DataConnectionTypes = DataConnectionTypes PipelineTypes = PipelineTypes def __init__(self, wml_credentials: Union[dict, 'WorkSpace'] = None, project_id: str = None, space_id: str = None) -> None: # note: as workspace is not clear enough to understand, there is a possibility to use pure # wml credentials with project and space IDs, but in addition we # leave a possibility to use a previous WorkSpace implementation, it could be passed as a first argument if wml_credentials is None: self._workspace = None self.runs = LocalAutoPipelinesRuns() else: if isinstance(wml_credentials, WorkSpace): self._workspace = wml_credentials else: self._workspace = WorkSpace(wml_credentials=wml_credentials.copy(), project_id=project_id, space_id=space_id) self.project_id = self._workspace.project_id self.space_id = self._workspace.space_id self.runs = AutoPipelinesRuns(engine=WMLEngine(self._workspace)) self.runs._workspace = self._workspace self._20_class_limit_removal_test = False # --- end note
[docs] def runs(self, *, filter: str) -> Union['AutoPipelinesRuns', 'LocalAutoPipelinesRuns']: """ Get the historical runs but with WML Pipeline name filter (for remote scenario). Get the historical runs but with experiment name filter (for local scenario). Parameters ---------- filter: str, required WML Pipeline name to filter the historical runs. or experiment name to filter the local historical runs. Returns ------- AutoPipelinesRuns or LocalAutoPipelinesRuns Example ------- >>> from ibm_watson_machine_learning.experiment import AutoAI >>> experiment = AutoAI(...) >>> >>> experiment.runs(filter='Test').list() """ if self._workspace is None: return LocalAutoPipelinesRuns(filter=filter) else: return AutoPipelinesRuns(engine=WMLEngine(self._workspace.wml_client), filter=filter)
[docs] def optimizer(self, name: str, *, prediction_type: 'PredictionType', prediction_column: str = None, prediction_columns: List[str] = None, timestamp_column_name: str = None, scoring: 'Metrics' = None, desc: str = None, test_size: float = None, # deprecated holdout_size: float = 0.1, max_number_of_estimators: int = 2, train_sample_rows_test_size: float = None, include_only_estimators: List[Union['ClassificationAlgorithms', 'RegressionAlgorithms', 'ForecastingAlgorithms']] = None, daub_include_only_estimators: List[Union['ClassificationAlgorithms', 'RegressionAlgorithms']] = None, # deprecated backtest_num: int = None, lookback_window: int = None, forecast_window: int = None, backtest_gap_length: int = None, cognito_transform_names: List['Transformers'] = None, data_join_graph: 'DataJoinGraph' = None, csv_separator: Union[List[str], str] = ',', excel_sheet: Union[str, int] = 0, encoding: str = 'utf-8', positive_label: str = None, data_join_only: bool = False, drop_duplicates: bool = True, text_processing: bool = None, word2vec_feature_number: int = None, daub_give_priority_to_runtime: float = None, **kwargs) -> Union['RemoteAutoPipelines', 'LocalAutoPipelines']: """ Initialize an AutoAi optimizer. Parameters ---------- name: str, required Name for the AutoPipelines prediction_type: PredictionType, required Type of the prediction. prediction_column: str, required for multiclass, binary and regression prediction types Name of the target/label column prediction_columns: List[str], required for forecasting prediction type Names of the target/label columns. timestamp_column_name: str, optional, used only for forecasting prediction type Name of timestamp column for time series forecasting. scoring: Metrics, optional Type of the metric to optimize with. Not used for forecasting. desc: str, optional Description test_size: deprecated Use `holdout_size` instead. holdout_size: float, optional Percentage of the entire dataset to leave as a holdout. Default 0.1 max_number_of_estimators: int, optional Maximum number (top-K ranked by DAUB model selection) of the selected algorithm, or estimator types, for example LGBMClassifierEstimator, XGBoostClassifierEstimator, or LogisticRegressionEstimator to use in pipeline composition. The default is 2, where only the highest ranked by model selection algorithm type is used. (min 1, max 4) train_sample_rows_test_size: float, optional Training data sampling percentage daub_include_only_estimators: deprecated Use `include_only_estimators` instead. include_only_estimators: List[Union['ClassificationAlgorithms', 'RegressionAlgorithms', 'ForecastingAlgorithms']], optional List of estimators to include in computation process. See: AutoAI.ClassificationAlgorithms, AutoAI.RegressionAlgorithms or AutoAI.ForecastingAlgorithms backtest_num: int, optional Used for forecasting prediction type. Configure number of backtests. Default value: 4 Value from range [0, 20] lookback_window: int, optional Used for forecasting prediction type. Configure length of lookback window. Default value: 10 If set to -1 lookback window will be auto-detected forecast_window: int, optional Used for forecasting prediction type. Configure length of forecast window. Default value: 1 Value from range [1, 60] backtest_gap_length: int, optional Used for forecasting prediction type. Configure gap between backtests. Default value: 0 Value from range [0, data length / 4] cognito_transform_names: List['Transformers'], optional List of transformers to include in feature enginnering computation process. See: AutoAI.Transformers csv_separator: Union[List[str], str], optional The separator, or list of separators to try for separating columns in a CSV file. Not used if the file_name is not a CSV file. Default is ','. excel_sheet: Union[str, int], optional Name or number of the excel sheet to use. Only use when xlsx file is an input. Default is 0. encoding: str, optional Encoding type for CSV training file. positive_label: str, optional The positive class to report when binary classification. When multiclass or regression, this will be ignored. t_shirt_size: TShirtSize, optional The size of the remote AutoAI POD instance (computing resources). Only applicable to a remote scenario. See: AutoAI.TShirtSize data_join_graph: DataJoinGraph, optional A graph object with definition of join structure for multiple input data sources. Data preprocess step for multiple files. data_join_only: bool, optional If True only preprocessing will be executed. drop_duplicates: bool, optional If True duplicated rows in data will be removed before further processing. Default is True. text_processing: bool, optional If True text processing will be enabled. Default is True. Applicable only on Cloud. word2vec_feature_number: int, optional Number of features which will be generated from text column. Will be applied only if `text_processing` is True. If `None` the default value will be taken. daub_give_priority_to_runtime: float, optional The importance of run time over score for pipelines ranking. Can take values between 0 and 5. If set to 0.0 only score is used. If set to 1 equally score and runtime are used. If set to value higher than 1 the runtime gets higher importance over score. Returns ------- RemoteAutoPipelines or LocalAutoPipelines, depends on how you initialize the AutoAI object. Example ------- >>> from ibm_watson_machine_learning.experiment import AutoAI >>> experiment = AutoAI(...) >>> >>> optimizer = experiment.optimizer( >>> name="name of the optimizer.", >>> prediction_type=AutoAI.PredictionType.BINARY, >>> prediction_column="y", >>> scoring=AutoAI.Metrics.ROC_AUC_SCORE, >>> desc="Some description.", >>> holdout_size=0.1, >>> max_num_daub_ensembles=1, >>> cognito_transform_names=[AutoAI.Transformers.SUM,AutoAI.Transformers.MAX], >>> train_sample_rows_test_size=1, >>> include_only_estimators=[AutoAI.ClassificationAlgorithms.LGBM, AutoAI.ClassificationAlgorithms.XGB], >>> t_shirt_size=AutoAI.TShirtSize.L >>> ) >>> >>> optimizer = experiment.optimizer( >>> name="name of the optimizer.", >>> prediction_type=AutoAI.PredictionType.MULTICLASS, >>> prediction_column="y", >>> scoring=AutoAI.Metrics.ROC_AUC_SCORE, >>> desc="Some description.", >>> ) """ if prediction_type == PredictionType.FORECASTING and self._workspace.wml_client.ICP and \ (self._workspace.wml_client.wml_credentials['version'].startswith('2.5') or \ self._workspace.wml_client.wml_credentials['version'].startswith('3.0') or \ self._workspace.wml_client.wml_credentials['version'].startswith('3.5')): raise TSNotSupported() if prediction_type == PredictionType.FORECASTING: if prediction_column is not None or prediction_columns is None: raise ForecastPredictionColumnsMissing() else: if prediction_column is None or prediction_columns is not None: raise NonForecastPredictionColumnMissing(prediction_type) if test_size: print('Note: Using `test_size` is deprecated. Use `holdout_size` instead.') if not holdout_size: holdout_size = test_size test_size = None if daub_include_only_estimators: print('Note: Using `daub_include_only_estimators` is deprecated. Use `include_only_estimators` instead.') if not include_only_estimators: include_only_estimators = daub_include_only_estimators daub_include_only_estimators = None validate_optimizer_enum_values( prediction_type=prediction_type, daub_include_only_estimators=daub_include_only_estimators, include_only_estimators=include_only_estimators, cognito_transform_names=cognito_transform_names, scoring=scoring, t_shirt_size=kwargs.get("t_shirt_size", TShirtSize.M) ) if daub_give_priority_to_runtime is not None: if daub_give_priority_to_runtime < 0.0 or daub_give_priority_to_runtime > 5.0: raise ParamOutOfRange('daub_give_priority_to_runtime', daub_give_priority_to_runtime, 0.0, 5.0) if data_join_graph: data_join_graph.problem_type = prediction_type data_join_graph.target_column = prediction_column if (prediction_type == PredictionType.BINARY and scoring in vars(PositiveLabelClass).values() and positive_label is None): raise MissingPositiveLabel(scoring, reason=f"\"{scoring}\" needs a \"positive_label\" " f"parameter to be defined when used with binary classification.") if self._workspace is None and kwargs.get('t_shirt_size'): raise LocalInstanceButRemoteParameter( "t_shirt_size", reason="During LocalOptimizer initialization, \"t_shirt_size\" parameter was provided. " "\"t_shirt_size\" parameter is only applicable to the RemoteOptimizer instance." ) elif self._workspace is None: if prediction_type == PredictionType.FORECASTING: raise ForecastingCannotBeRunAsLocalScenario() reduced_kwargs = copy.copy(kwargs) for n in ['_force_local_scenario']: if n in reduced_kwargs: del reduced_kwargs[n] validate_additional_params_for_optimizer(reduced_kwargs) return LocalAutoPipelines( name=name, prediction_type='classification' if prediction_type in ['binary', 'multiclass'] else prediction_type, prediction_column=prediction_column, scoring=scoring, desc=desc, holdout_size=holdout_size, max_num_daub_ensembles=max_number_of_estimators, train_sample_rows_test_size=train_sample_rows_test_size, include_only_estimators=include_only_estimators, cognito_transform_names=cognito_transform_names, positive_label=positive_label, _force_local_scenario=kwargs.get('_force_local_scenario', False), **reduced_kwargs ) else: reduced_kwargs = copy.copy(kwargs) for n in ['t_shirt_size', 'notebooks', 'autoai_pod_version', 'obm_pod_version']: if n in reduced_kwargs: del reduced_kwargs[n] validate_additional_params_for_optimizer(reduced_kwargs) engine = WMLEngine(self._workspace) if self._20_class_limit_removal_test: engine._20_class_limit_removal_test = True optimizer = RemoteAutoPipelines( name=name, prediction_type=prediction_type, prediction_column=prediction_column, prediction_columns=prediction_columns, timestamp_column_name=timestamp_column_name, scoring=scoring, desc=desc, holdout_size=holdout_size, max_num_daub_ensembles=max_number_of_estimators, t_shirt_size=self._workspace.restrict_pod_size(t_shirt_size=kwargs.get( 't_shirt_size', TShirtSize.M if self._workspace.wml_client.ICP else TShirtSize.L) ), train_sample_rows_test_size=train_sample_rows_test_size, include_only_estimators=include_only_estimators, backtest_num=backtest_num, lookback_window=lookback_window, forecast_window=forecast_window, backtest_gap_length=backtest_gap_length, cognito_transform_names=cognito_transform_names, data_join_graph=data_join_graph, drop_duplicates=drop_duplicates, text_processing=text_processing, word2vec_feature_number=word2vec_feature_number, csv_separator=csv_separator, excel_sheet=excel_sheet, encoding=encoding, positive_label=positive_label, data_join_only=data_join_only, engine=engine, daub_give_priority_to_runtime=daub_give_priority_to_runtime, notebooks=kwargs.get('notebooks', True), autoai_pod_version=kwargs.get('autoai_pod_version', None), obm_pod_version=kwargs.get('obm_pod_version', None), **reduced_kwargs ) optimizer._workspace = self._workspace return optimizer