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* data in csv * support ray ObjectRef #365 * use object store to store data when using ray * make lgbm tuning example a test * homepage title
519 lines
19 KiB
Python
519 lines
19 KiB
Python
import unittest
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import numpy as np
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import scipy.sparse
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from sklearn.datasets import load_iris, load_wine
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from flaml import AutoML
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from flaml.data import CLASSIFICATION, get_output_from_log
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from flaml.model import LGBMEstimator, XGBoostSklearnEstimator, SKLearnEstimator
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from flaml import tune
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from flaml.training_log import training_log_reader
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class MyRegularizedGreedyForest(SKLearnEstimator):
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def __init__(self, task="binary", **config):
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super().__init__(task, **config)
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if task in CLASSIFICATION:
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from rgf.sklearn import RGFClassifier
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self.estimator_class = RGFClassifier
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else:
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from rgf.sklearn import RGFRegressor
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self.estimator_class = RGFRegressor
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@classmethod
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def search_space(cls, data_size, task):
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space = {
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"max_leaf": {
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"domain": tune.lograndint(lower=4, upper=data_size[0]),
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"init_value": 4,
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},
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"n_iter": {
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"domain": tune.lograndint(lower=1, upper=data_size[0]),
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"init_value": 1,
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},
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"n_tree_search": {
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"domain": tune.lograndint(lower=1, upper=32768),
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"init_value": 1,
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},
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"opt_interval": {
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"domain": tune.lograndint(lower=1, upper=10000),
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"init_value": 100,
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},
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"learning_rate": {"domain": tune.loguniform(lower=0.01, upper=20.0)},
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"min_samples_leaf": {
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"domain": tune.lograndint(lower=1, upper=20),
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"init_value": 20,
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},
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}
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return space
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@classmethod
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def size(cls, config):
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max_leaves = int(round(config["max_leaf"]))
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n_estimators = int(round(config["n_iter"]))
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return (max_leaves * 3 + (max_leaves - 1) * 4 + 1.0) * n_estimators * 8
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@classmethod
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def cost_relative2lgbm(cls):
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return 1.0
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class MyLargeXGB(XGBoostSklearnEstimator):
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@classmethod
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def search_space(cls, **params):
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return {
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"n_estimators": {
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"domain": tune.lograndint(lower=4, upper=32768),
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"init_value": 32768,
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"low_cost_init_value": 4,
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},
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"max_leaves": {
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"domain": tune.lograndint(lower=4, upper=3276),
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"init_value": 3276,
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"low_cost_init_value": 4,
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},
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}
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class MyLargeLGBM(LGBMEstimator):
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@classmethod
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def search_space(cls, **params):
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return {
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"n_estimators": {
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"domain": tune.lograndint(lower=4, upper=32768),
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"init_value": 32768,
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"low_cost_init_value": 4,
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},
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"num_leaves": {
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"domain": tune.lograndint(lower=4, upper=3276),
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"init_value": 3276,
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"low_cost_init_value": 4,
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},
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}
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def custom_metric(
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X_val,
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y_val,
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estimator,
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labels,
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X_train,
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y_train,
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weight_val=None,
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weight_train=None,
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config=None,
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groups_val=None,
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groups_train=None,
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):
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from sklearn.metrics import log_loss
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import time
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start = time.time()
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y_pred = estimator.predict_proba(X_val)
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pred_time = (time.time() - start) / len(X_val)
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val_loss = log_loss(y_val, y_pred, labels=labels, sample_weight=weight_val)
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y_pred = estimator.predict_proba(X_train)
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train_loss = log_loss(y_train, y_pred, labels=labels, sample_weight=weight_train)
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alpha = 0.5
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return val_loss * (1 + alpha) - alpha * train_loss, {
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"val_loss": val_loss,
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"train_loss": train_loss,
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"pred_time": pred_time,
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}
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class TestMultiClass(unittest.TestCase):
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def test_custom_learner(self):
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automl = AutoML()
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automl.add_learner(learner_name="RGF", learner_class=MyRegularizedGreedyForest)
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X_train, y_train = load_wine(return_X_y=True)
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settings = {
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"time_budget": 8, # total running time in seconds
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"estimator_list": ["RGF", "lgbm", "rf", "xgboost"],
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"task": "classification", # task type
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"sample": True, # whether to subsample training data
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"log_file_name": "test/wine.log",
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"log_training_metric": True, # whether to log training metric
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"n_jobs": 1,
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}
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"""The main flaml automl API"""
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automl.fit(X_train=X_train, y_train=y_train, **settings)
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# print the best model found for RGF
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print(automl.best_model_for_estimator("RGF"))
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MyRegularizedGreedyForest.search_space = lambda data_size, task: {}
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automl.fit(X_train=X_train, y_train=y_train, **settings)
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def test_ensemble(self):
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automl = AutoML()
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automl.add_learner(learner_name="RGF", learner_class=MyRegularizedGreedyForest)
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X_train, y_train = load_wine(return_X_y=True)
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settings = {
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"time_budget": 5, # total running time in seconds
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"estimator_list": ["rf", "xgboost", "catboost"],
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"task": "classification", # task type
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"sample": True, # whether to subsample training data
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"log_file_name": "test/wine.log",
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"log_training_metric": True, # whether to log training metric
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"ensemble": {
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"final_estimator": MyRegularizedGreedyForest(),
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"passthrough": False,
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},
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"n_jobs": 1,
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}
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"""The main flaml automl API"""
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automl.fit(X_train=X_train, y_train=y_train, **settings)
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def test_dataframe(self):
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self.test_classification(True)
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def test_custom_metric(self):
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df, y = load_iris(return_X_y=True, as_frame=True)
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df["label"] = y
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automl_experiment = AutoML()
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automl_settings = {
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"dataframe": df,
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"label": "label",
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"time_budget": 5,
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"eval_method": "cv",
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"metric": custom_metric,
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"task": "classification",
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"log_file_name": "test/iris_custom.log",
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"log_training_metric": True,
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"log_type": "all",
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"n_jobs": 1,
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"model_history": True,
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"sample_weight": np.ones(len(y)),
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"pred_time_limit": 1e-5,
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"ensemble": True,
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}
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automl_experiment.fit(**automl_settings)
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print(automl_experiment.classes_)
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print(automl_experiment.model)
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print(automl_experiment.config_history)
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print(automl_experiment.best_model_for_estimator("rf"))
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print(automl_experiment.best_iteration)
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print(automl_experiment.best_estimator)
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automl_experiment = AutoML()
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estimator = automl_experiment.get_estimator_from_log(
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automl_settings["log_file_name"], record_id=0, task="multi"
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)
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print(estimator)
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(
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time_history,
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best_valid_loss_history,
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valid_loss_history,
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config_history,
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metric_history,
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) = get_output_from_log(
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filename=automl_settings["log_file_name"], time_budget=6
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)
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print(metric_history)
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try:
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import ray
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df = ray.put(df)
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automl_settings["dataframe"] = df
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automl_settings["use_ray"] = True
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automl_experiment.fit(**automl_settings)
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except ImportError:
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pass
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def test_classification(self, as_frame=False):
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automl_experiment = AutoML()
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automl_settings = {
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"time_budget": 4,
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"metric": "accuracy",
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"task": "classification",
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"log_file_name": "test/iris.log",
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"log_training_metric": True,
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"n_jobs": 1,
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"model_history": True,
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}
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X_train, y_train = load_iris(return_X_y=True, as_frame=as_frame)
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if as_frame:
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# test drop column
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X_train.columns = range(X_train.shape[1])
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X_train[X_train.shape[1]] = np.zeros(len(y_train))
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automl_experiment.fit(X_train=X_train, y_train=y_train, **automl_settings)
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print(automl_experiment.classes_)
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print(automl_experiment.predict(X_train)[:5])
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print(automl_experiment.model)
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print(automl_experiment.config_history)
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print(automl_experiment.best_model_for_estimator("catboost"))
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print(automl_experiment.best_iteration)
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print(automl_experiment.best_estimator)
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del automl_settings["metric"]
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del automl_settings["model_history"]
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del automl_settings["log_training_metric"]
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automl_experiment = AutoML(task="classification")
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duration = automl_experiment.retrain_from_log(
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log_file_name=automl_settings["log_file_name"],
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X_train=X_train,
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y_train=y_train,
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train_full=True,
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record_id=0,
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)
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print(duration)
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print(automl_experiment.model)
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print(automl_experiment.predict_proba(X_train)[:5])
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def test_micro_macro_f1(self):
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automl_experiment_micro = AutoML()
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automl_experiment_macro = AutoML()
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automl_settings = {
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"time_budget": 2,
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"task": "classification",
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"log_file_name": "test/micro_macro_f1.log",
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"log_training_metric": True,
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"n_jobs": 1,
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"model_history": True,
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}
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X_train, y_train = load_iris(return_X_y=True)
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automl_experiment_micro.fit(
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X_train=X_train, y_train=y_train, metric="micro_f1", **automl_settings
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)
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automl_experiment_macro.fit(
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X_train=X_train, y_train=y_train, metric="macro_f1", **automl_settings
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)
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estimator = automl_experiment_macro.model
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y_pred = estimator.predict(X_train)
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y_pred_proba = estimator.predict_proba(X_train)
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from flaml.ml import norm_confusion_matrix, multi_class_curves
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print(norm_confusion_matrix(y_train, y_pred))
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from sklearn.metrics import roc_curve, precision_recall_curve
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print(multi_class_curves(y_train, y_pred_proba, roc_curve))
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print(multi_class_curves(y_train, y_pred_proba, precision_recall_curve))
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def test_roc_auc_ovr(self):
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automl_experiment = AutoML()
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X_train, y_train = load_iris(return_X_y=True)
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automl_settings = {
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"time_budget": 1,
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"metric": "roc_auc_ovr",
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"task": "classification",
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"log_file_name": "test/roc_auc_ovr.log",
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"log_training_metric": True,
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"n_jobs": 1,
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"sample_weight": np.ones(len(y_train)),
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"eval_method": "holdout",
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"model_history": True,
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}
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automl_experiment.fit(X_train=X_train, y_train=y_train, **automl_settings)
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def test_roc_auc_ovo(self):
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automl_experiment = AutoML()
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automl_settings = {
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"time_budget": 1,
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"metric": "roc_auc_ovo",
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"task": "classification",
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"log_file_name": "test/roc_auc_ovo.log",
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"log_training_metric": True,
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"n_jobs": 1,
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"model_history": True,
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}
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X_train, y_train = load_iris(return_X_y=True)
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automl_experiment.fit(X_train=X_train, y_train=y_train, **automl_settings)
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def test_sparse_matrix_classification(self):
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automl_experiment = AutoML()
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automl_settings = {
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"time_budget": 2,
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"metric": "auto",
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"task": "classification",
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"log_file_name": "test/sparse_classification.log",
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"split_type": "uniform",
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"n_jobs": 1,
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"model_history": True,
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}
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X_train = scipy.sparse.random(1554, 21, dtype=int)
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y_train = np.random.randint(3, size=1554)
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automl_experiment.fit(X_train=X_train, y_train=y_train, **automl_settings)
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print(automl_experiment.classes_)
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print(automl_experiment.predict_proba(X_train))
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print(automl_experiment.model)
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print(automl_experiment.config_history)
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print(automl_experiment.best_model_for_estimator("extra_tree"))
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print(automl_experiment.best_iteration)
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print(automl_experiment.best_estimator)
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def _test_memory_limit(self):
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automl_experiment = AutoML()
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automl_experiment.add_learner(
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learner_name="large_lgbm", learner_class=MyLargeLGBM
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)
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automl_settings = {
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"time_budget": -1,
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"task": "classification",
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"log_file_name": "test/classification_oom.log",
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"estimator_list": ["large_lgbm"],
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"log_type": "all",
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"hpo_method": "random",
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}
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X_train, y_train = load_iris(return_X_y=True, as_frame=True)
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automl_experiment.fit(
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X_train=X_train, y_train=y_train, max_iter=1, **automl_settings
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)
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print(automl_experiment.model)
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def test_time_limit(self):
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automl_experiment = AutoML()
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automl_experiment.add_learner(
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learner_name="large_lgbm", learner_class=MyLargeLGBM
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)
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automl_experiment.add_learner(
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learner_name="large_xgb", learner_class=MyLargeXGB
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)
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automl_settings = {
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"time_budget": 0.5,
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"task": "classification",
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"log_file_name": "test/classification_timeout.log",
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"estimator_list": ["catboost"],
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"log_type": "all",
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"hpo_method": "random",
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}
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X_train, y_train = load_iris(return_X_y=True, as_frame=True)
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automl_experiment.fit(X_train=X_train, y_train=y_train, **automl_settings)
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print(automl_experiment.model.params)
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automl_settings["estimator_list"] = ["large_xgb"]
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automl_experiment.fit(X_train=X_train, y_train=y_train, **automl_settings)
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print(automl_experiment.model)
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automl_settings["estimator_list"] = ["large_lgbm"]
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automl_experiment.fit(X_train=X_train, y_train=y_train, **automl_settings)
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print(automl_experiment.model)
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def test_fit_w_starting_point(self, as_frame=True):
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automl_experiment = AutoML()
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automl_settings = {
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"time_budget": 3,
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"metric": "accuracy",
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"task": "classification",
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"log_file_name": "test/iris.log",
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"log_training_metric": True,
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"n_jobs": 1,
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"model_history": True,
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}
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X_train, y_train = load_iris(return_X_y=True, as_frame=as_frame)
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if as_frame:
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# test drop column
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X_train.columns = range(X_train.shape[1])
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X_train[X_train.shape[1]] = np.zeros(len(y_train))
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automl_experiment.fit(X_train=X_train, y_train=y_train, **automl_settings)
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automl_val_accuracy = 1.0 - automl_experiment.best_loss
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print("Best ML leaner:", automl_experiment.best_estimator)
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print("Best hyperparmeter config:", automl_experiment.best_config)
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print("Best accuracy on validation data: {0:.4g}".format(automl_val_accuracy))
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print(
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"Training duration of best run: {0:.4g} s".format(
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automl_experiment.best_config_train_time
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)
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)
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starting_points = automl_experiment.best_config_per_estimator
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print("starting_points", starting_points)
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print("loss of the starting_points", automl_experiment.best_loss_per_estimator)
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automl_settings_resume = {
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"time_budget": 2,
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"metric": "accuracy",
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"task": "classification",
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"log_file_name": "test/iris_resume.log",
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"log_training_metric": True,
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"n_jobs": 1,
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"model_history": True,
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"log_type": "all",
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"starting_points": starting_points,
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}
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new_automl_experiment = AutoML()
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new_automl_experiment.fit(
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X_train=X_train, y_train=y_train, **automl_settings_resume
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)
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new_automl_val_accuracy = 1.0 - new_automl_experiment.best_loss
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print("Best ML leaner:", new_automl_experiment.best_estimator)
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print("Best hyperparmeter config:", new_automl_experiment.best_config)
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print(
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"Best accuracy on validation data: {0:.4g}".format(new_automl_val_accuracy)
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)
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print(
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"Training duration of best run: {0:.4g} s".format(
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new_automl_experiment.best_config_train_time
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)
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)
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def test_fit_w_starting_points_list(self, as_frame=True):
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automl_experiment = AutoML()
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automl_settings = {
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"time_budget": 3,
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"metric": "accuracy",
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"task": "classification",
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"log_file_name": "test/iris.log",
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|
"log_training_metric": True,
|
|
"n_jobs": 1,
|
|
"model_history": True,
|
|
}
|
|
X_train, y_train = load_iris(return_X_y=True, as_frame=as_frame)
|
|
if as_frame:
|
|
# test drop column
|
|
X_train.columns = range(X_train.shape[1])
|
|
X_train[X_train.shape[1]] = np.zeros(len(y_train))
|
|
automl_experiment.fit(X_train=X_train, y_train=y_train, **automl_settings)
|
|
automl_val_accuracy = 1.0 - automl_experiment.best_loss
|
|
print("Best ML leaner:", automl_experiment.best_estimator)
|
|
print("Best hyperparmeter config:", automl_experiment.best_config)
|
|
print("Best accuracy on validation data: {0:.4g}".format(automl_val_accuracy))
|
|
print(
|
|
"Training duration of best run: {0:.4g} s".format(
|
|
automl_experiment.best_config_train_time
|
|
)
|
|
)
|
|
|
|
starting_points = {}
|
|
log_file_name = automl_settings["log_file_name"]
|
|
with training_log_reader(log_file_name) as reader:
|
|
for record in reader.records():
|
|
config = record.config
|
|
learner = record.learner
|
|
if learner not in starting_points:
|
|
starting_points[learner] = []
|
|
starting_points[learner].append(config)
|
|
max_iter = sum([len(s) for k, s in starting_points.items()])
|
|
automl_settings_resume = {
|
|
"time_budget": 2,
|
|
"metric": "accuracy",
|
|
"task": "classification",
|
|
"log_file_name": "test/iris_resume_all.log",
|
|
"log_training_metric": True,
|
|
"n_jobs": 1,
|
|
"max_iter": max_iter,
|
|
"model_history": True,
|
|
"log_type": "all",
|
|
"starting_points": starting_points,
|
|
"append_log": True,
|
|
}
|
|
new_automl_experiment = AutoML()
|
|
new_automl_experiment.fit(
|
|
X_train=X_train, y_train=y_train, **automl_settings_resume
|
|
)
|
|
|
|
new_automl_val_accuracy = 1.0 - new_automl_experiment.best_loss
|
|
# print('Best ML leaner:', new_automl_experiment.best_estimator)
|
|
# print('Best hyperparmeter config:', new_automl_experiment.best_config)
|
|
print(
|
|
"Best accuracy on validation data: {0:.4g}".format(new_automl_val_accuracy)
|
|
)
|
|
# print('Training duration of best run: {0:.4g} s'.format(new_automl_experiment.best_config_train_time))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|