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b04b00dc9d
* recover ConcurrencyLimiter * cost attribute * update notebooks Co-authored-by: Chi Wang <wang.chi@microsoft.com> Co-authored-by: Qingyun Wu <qiw@microsoft.com>
1039 lines
109 KiB
Plaintext
1039 lines
109 KiB
Plaintext
{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {
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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"Copyright (c) 2020-2021 Microsoft Corporation. All rights reserved. \n",
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"\n",
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"Licensed under the MIT License.\n",
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"\n",
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"# AutoML with FLAML Library\n",
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"\n",
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"\n",
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"## 1. Introduction\n",
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"\n",
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"FLAML is a Python library (https://github.com/microsoft/FLAML) designed to automatically produce accurate machine learning models \n",
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"with low computational cost. It is fast and cheap. The simple and lightweight design makes it easy \n",
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"to use and extend, such as adding new learners. FLAML can \n",
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"- serve as an economical AutoML engine,\n",
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"- be used as a fast hyperparameter tuning tool, or \n",
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"- be embedded in self-tuning software that requires low latency & resource in repetitive\n",
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" tuning tasks.\n",
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"\n",
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"In this notebook, we use one real data example (binary classification) to showcase how to use FLAML library.\n",
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"\n",
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"FLAML requires `Python>=3.6`. To run this notebook example, please install flaml with the `notebook` option:\n",
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"```bash\n",
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"pip install flaml[notebook]\n",
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"```"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"!pip install flaml[notebook];"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## 2. Classification Example\n",
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"### Load data and preprocess\n",
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"\n",
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"Download [Airlines dataset](https://www.openml.org/d/1169) from OpenML. The task is to predict whether a given flight will be delayed, given the information of the scheduled departure."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 22,
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"metadata": {
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"slideshow": {
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"slide_type": "subslide"
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},
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"tags": []
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},
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"outputs": [
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{
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"output_type": "stream",
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"name": "stdout",
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"text": [
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"load dataset from ./openml_ds1169.pkl\nDataset name: airlines\nX_train.shape: (404537, 7), y_train.shape: (404537,);\nX_test.shape: (134846, 7), y_test.shape: (134846,)\n"
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]
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}
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],
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"source": [
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"from flaml.data import load_openml_dataset\n",
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"X_train, X_test, y_train, y_test = load_openml_dataset(dataset_id=1169, data_dir='./')"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"### Run FLAML\n",
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"In the FLAML automl run configuration, users can specify the task type, time budget, error metric, learner list, whether to subsample, resampling strategy type, and so on. All these arguments have default values which will be used if users do not provide them. For example, the default ML learners of FLAML are `['lgbm', 'xgboost', 'catboost', 'rf', 'extra_tree', 'lrl1']`. "
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]
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},
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{
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"cell_type": "code",
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"execution_count": 2,
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"metadata": {
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"slideshow": {
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"slide_type": "slide"
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}
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},
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"outputs": [],
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"source": [
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"''' import AutoML class from flaml package '''\n",
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"from flaml import AutoML\n",
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"automl = AutoML()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"metadata": {
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"slideshow": {
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"slide_type": "slide"
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}
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},
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"outputs": [],
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"source": [
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"settings = {\n",
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" \"time_budget\": 300, # total running time in seconds\n",
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" \"metric\": 'accuracy', # primary metrics can be chosen from: ['accuracy','roc_auc','f1','log_loss','mae','mse','r2']\n",
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" \"task\": 'classification', # task type \n",
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" \"log_file_name\": 'airlines_experiment.log', # flaml log file\n",
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"}"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 4,
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"metadata": {
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"slideshow": {
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"slide_type": "slide"
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},
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"tags": [
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"outputPrepend"
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]
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},
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"outputs": [
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{
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"output_type": "stream",
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"name": "stderr",
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"text": [
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"or=0.3575,\tbest xgboost's error=0.3575\n",
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"[flaml.automl: 07-06 10:20:42] {1012} INFO - iteration 69, current learner lrl1\n",
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"No low-cost partial config given to the search algorithm. For cost-frugal search, consider providing low-cost values for cost-related hps via 'low_cost_partial_config'.\n",
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"/Users/qingyun/miniconda3/envs/py38/lib/python3.8/site-packages/sklearn/linear_model/_sag.py:328: ConvergenceWarning: The max_iter was reached which means the coef_ did not converge\n",
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" warnings.warn(\"The max_iter was reached which means \"\n",
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"/Users/qingyun/miniconda3/envs/py38/lib/python3.8/site-packages/sklearn/linear_model/_sag.py:328: ConvergenceWarning: The max_iter was reached which means the coef_ did not converge\n",
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"/Users/qingyun/miniconda3/envs/py38/lib/python3.8/site-packages/sklearn/linear_model/_sag.py:328: ConvergenceWarning: The max_iter was reached which means the coef_ did not converge\n",
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" warnings.warn(\"The max_iter was reached which means \"\n",
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"/Users/qingyun/miniconda3/envs/py38/lib/python3.8/site-packages/sklearn/linear_model/_sag.py:328: ConvergenceWarning: The max_iter was reached which means the coef_ did not converge\n",
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" warnings.warn(\"The max_iter was reached which means \"\n",
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"[flaml.automl: 07-06 10:24:58] {1183} INFO - retrain lgbm for 7.5s\n",
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"[flaml.automl: 07-06 10:25:06] {1206} INFO - selected model: LGBMClassifier(colsample_bytree=0.7264845266978395,\n",
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" learning_rate=0.19101023272120005, max_bin=256,\n",
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" min_child_samples=38, n_estimators=96, num_leaves=1176,\n",
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" objective='binary', reg_alpha=0.23464496750365973,\n",
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" reg_lambda=381.05540209167094, subsample=0.8560685526719122)\n",
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"[flaml.automl: 07-06 10:25:06] {963} INFO - fit succeeded\n"
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]
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}
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],
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"source": [
|
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"'''The main flaml automl API'''\n",
|
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"automl.fit(X_train=X_train, y_train=y_train, **settings)"
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]
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},
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{
|
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"cell_type": "markdown",
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"metadata": {
|
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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
|
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"### Best model and metric"
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|
]
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},
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{
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"cell_type": "code",
|
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"execution_count": 5,
|
|
"metadata": {
|
|
"slideshow": {
|
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"slide_type": "slide"
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},
|
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"tags": []
|
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},
|
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"outputs": [
|
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{
|
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"output_type": "stream",
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"name": "stdout",
|
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"text": [
|
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"Best ML leaner: lgbm\nBest hyperparmeter config: {'n_estimators': 96.0, 'num_leaves': 1176.0, 'min_child_samples': 38.0, 'learning_rate': 0.19101023272120005, 'subsample': 0.8560685526719122, 'log_max_bin': 9.0, 'colsample_bytree': 0.7264845266978395, 'reg_alpha': 0.23464496750365973, 'reg_lambda': 381.05540209167094, 'FLAML_sample_size': 364083}\nBest accuracy on validation data: 0.6739\nTraining duration of best run: 8.084 s\n"
|
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]
|
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}
|
|
],
|
|
"source": [
|
|
"''' retrieve best config and best learner'''\n",
|
|
"print('Best ML leaner:', automl.best_estimator)\n",
|
|
"print('Best hyperparmeter config:', automl.best_config)\n",
|
|
"print('Best accuracy on validation data: {0:.4g}'.format(1-automl.best_loss))\n",
|
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"print('Training duration of best run: {0:.4g} s'.format(automl.best_config_train_time))"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": 23,
|
|
"metadata": {
|
|
"slideshow": {
|
|
"slide_type": "slide"
|
|
}
|
|
},
|
|
"outputs": [
|
|
{
|
|
"output_type": "execute_result",
|
|
"data": {
|
|
"text/plain": [
|
|
"LGBMClassifier(colsample_bytree=0.6204654035998071,\n",
|
|
" learning_rate=0.17783122919583272, max_bin=16,\n",
|
|
" min_child_samples=17, n_estimators=197, num_leaves=340,\n",
|
|
" objective='binary', reg_alpha=0.07967521254431058,\n",
|
|
" reg_lambda=6.332908973055842, subsample=0.8413048297641477)"
|
|
]
|
|
},
|
|
"metadata": {},
|
|
"execution_count": 23
|
|
}
|
|
],
|
|
"source": [
|
|
"automl.model.estimator"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": 7,
|
|
"metadata": {
|
|
"slideshow": {
|
|
"slide_type": "slide"
|
|
}
|
|
},
|
|
"outputs": [],
|
|
"source": [
|
|
"''' pickle and save the automl object '''\n",
|
|
"import pickle\n",
|
|
"with open('automl.pkl', 'wb') as f:\n",
|
|
" pickle.dump(automl, f, pickle.HIGHEST_PROTOCOL)"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": 8,
|
|
"metadata": {
|
|
"slideshow": {
|
|
"slide_type": "slide"
|
|
},
|
|
"tags": []
|
|
},
|
|
"outputs": [
|
|
{
|
|
"output_type": "stream",
|
|
"name": "stdout",
|
|
"text": [
|
|
"Predicted labels [1 0 1 ... 1 0 0]\nTrue labels [0 0 0 ... 0 1 0]\n"
|
|
]
|
|
}
|
|
],
|
|
"source": [
|
|
"''' compute predictions of testing dataset ''' \n",
|
|
"y_pred = automl.predict(X_test)\n",
|
|
"print('Predicted labels', y_pred)\n",
|
|
"print('True labels', y_test)\n",
|
|
"y_pred_proba = automl.predict_proba(X_test)[:,1]"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": 9,
|
|
"metadata": {
|
|
"slideshow": {
|
|
"slide_type": "slide"
|
|
},
|
|
"tags": []
|
|
},
|
|
"outputs": [
|
|
{
|
|
"output_type": "stream",
|
|
"name": "stdout",
|
|
"text": [
|
|
"accuracy = 0.6715957462586951\nroc_auc = 0.7253027586499301\nlog_loss = 0.6034784793498795\nf1 = 0.5884386617100371\n"
|
|
]
|
|
}
|
|
],
|
|
"source": [
|
|
"''' compute different metric values on testing dataset'''\n",
|
|
"from flaml.ml import sklearn_metric_loss_score\n",
|
|
"print('accuracy', '=', 1 - sklearn_metric_loss_score('accuracy', y_pred, y_test))\n",
|
|
"print('roc_auc', '=', 1 - sklearn_metric_loss_score('roc_auc', y_pred_proba, y_test))\n",
|
|
"print('log_loss', '=', sklearn_metric_loss_score('log_loss', y_pred_proba, y_test))\n",
|
|
"print('f1', '=', 1 - sklearn_metric_loss_score('f1', y_pred, y_test))"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {
|
|
"slideshow": {
|
|
"slide_type": "slide"
|
|
}
|
|
},
|
|
"source": [
|
|
"See Section 4 for an accuracy comparison with default LightGBM and XGBoost.\n",
|
|
"\n",
|
|
"### Log history"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": 10,
|
|
"metadata": {
|
|
"slideshow": {
|
|
"slide_type": "subslide"
|
|
},
|
|
"tags": []
|
|
},
|
|
"outputs": [
|
|
{
|
|
"output_type": "stream",
|
|
"name": "stdout",
|
|
"text": [
|
|
"{'Current Learner': 'lgbm', 'Current Sample': 10000, 'Current Hyper-parameters': {'n_estimators': 4, 'num_leaves': 4, 'min_child_samples': 20, 'learning_rate': 0.1, 'subsample': 1.0, 'log_max_bin': 8, 'colsample_bytree': 1.0, 'reg_alpha': 0.0009765625, 'reg_lambda': 1.0, 'FLAML_sample_size': 10000}, 'Best Learner': 'lgbm', 'Best Hyper-parameters': {'n_estimators': 4, 'num_leaves': 4, 'min_child_samples': 20, 'learning_rate': 0.1, 'subsample': 1.0, 'log_max_bin': 8, 'colsample_bytree': 1.0, 'reg_alpha': 0.0009765625, 'reg_lambda': 1.0, 'FLAML_sample_size': 10000}}\n{'Current Learner': 'xgboost', 'Current Sample': 10000, 'Current Hyper-parameters': {'n_estimators': 4.0, 'max_leaves': 4.0, 'min_child_weight': 3.8156120279609143, 'learning_rate': 0.03859136192132085, 'subsample': 1.0, 'colsample_bylevel': 0.8148474110627004, 'colsample_bytree': 0.9777234800442423, 'reg_alpha': 0.0009765625, 'reg_lambda': 5.525802807180917, 'FLAML_sample_size': 10000}, 'Best Learner': 'xgboost', 'Best Hyper-parameters': {'n_estimators': 4.0, 'max_leaves': 4.0, 'min_child_weight': 3.8156120279609143, 'learning_rate': 0.03859136192132085, 'subsample': 1.0, 'colsample_bylevel': 0.8148474110627004, 'colsample_bytree': 0.9777234800442423, 'reg_alpha': 0.0009765625, 'reg_lambda': 5.525802807180917, 'FLAML_sample_size': 10000}}\n{'Current Learner': 'xgboost', 'Current Sample': 10000, 'Current Hyper-parameters': {'n_estimators': 4.0, 'max_leaves': 4.0, 'min_child_weight': 0.9999999999999981, 'learning_rate': 0.09999999999999995, 'subsample': 0.9266743941610592, 'colsample_bylevel': 1.0, 'colsample_bytree': 1.0, 'reg_alpha': 0.0013933617380144255, 'reg_lambda': 0.9999999999999992, 'FLAML_sample_size': 10000}, 'Best Learner': 'xgboost', 'Best Hyper-parameters': {'n_estimators': 4.0, 'max_leaves': 4.0, 'min_child_weight': 0.9999999999999981, 'learning_rate': 0.09999999999999995, 'subsample': 0.9266743941610592, 'colsample_bylevel': 1.0, 'colsample_bytree': 1.0, 'reg_alpha': 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0.9999999999999981, 'learning_rate': 0.09999999999999995, 'subsample': 0.9266743941610592, 'colsample_bylevel': 0.9168331919232143, 'colsample_bytree': 1.0, 'reg_alpha': 0.0013933617380144255, 'reg_lambda': 0.9999999999999984, 'FLAML_sample_size': 10000}, 'Best Learner': 'xgboost', 'Best Hyper-parameters': {'n_estimators': 4.0, 'max_leaves': 8.0, 'min_child_weight': 0.9999999999999981, 'learning_rate': 0.09999999999999995, 'subsample': 0.9266743941610592, 'colsample_bylevel': 0.9168331919232143, 'colsample_bytree': 1.0, 'reg_alpha': 0.0013933617380144255, 'reg_lambda': 0.9999999999999984, 'FLAML_sample_size': 10000}}\n{'Current Learner': 'xgboost', 'Current Sample': 10000, 'Current Hyper-parameters': {'n_estimators': 12.0, 'max_leaves': 8.0, 'min_child_weight': 3.1718521304832716, 'learning_rate': 0.18850082505120708, 'subsample': 0.9647550813352507, 'colsample_bylevel': 1.0, 'colsample_bytree': 1.0, 'reg_alpha': 0.0010352743615901622, 'reg_lambda': 0.4380234559597813, 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0.8072004842817196, 'learning_rate': 0.09228694613650908, 'subsample': 0.8895588746662894, 'colsample_bylevel': 0.35630670144162413, 'colsample_bytree': 0.6863451794740817, 'reg_alpha': 0.0027488949929569983, 'reg_lambda': 0.7489028833779001, 'FLAML_sample_size': 40000}}\n{'Current Learner': 'lgbm', 'Current Sample': 364083, 'Current Hyper-parameters': {'n_estimators': 29.0, 'num_leaves': 30.0, 'min_child_samples': 27.0, 'learning_rate': 0.3345600006903613, 'subsample': 1.0, 'log_max_bin': 6.0, 'colsample_bytree': 0.6138481769580465, 'reg_alpha': 0.02608844295136239, 'reg_lambda': 4.068656226566239, 'FLAML_sample_size': 364083}, 'Best Learner': 'lgbm', 'Best Hyper-parameters': {'n_estimators': 29.0, 'num_leaves': 30.0, 'min_child_samples': 27.0, 'learning_rate': 0.3345600006903613, 'subsample': 1.0, 'log_max_bin': 6.0, 'colsample_bytree': 0.6138481769580465, 'reg_alpha': 0.02608844295136239, 'reg_lambda': 4.068656226566239, 'FLAML_sample_size': 364083}}\n{'Current Learner': 'lgbm', 'Current Sample': 364083, 'Current Hyper-parameters': {'n_estimators': 32.0, 'num_leaves': 66.0, 'min_child_samples': 30.0, 'learning_rate': 0.12647892799791985, 'subsample': 0.9860465287537004, 'log_max_bin': 6.0, 'colsample_bytree': 0.6645176750515542, 'reg_alpha': 0.0018225057315840252, 'reg_lambda': 30.9118880488899, 'FLAML_sample_size': 364083}, 'Best Learner': 'lgbm', 'Best Hyper-parameters': {'n_estimators': 32.0, 'num_leaves': 66.0, 'min_child_samples': 30.0, 'learning_rate': 0.12647892799791985, 'subsample': 0.9860465287537004, 'log_max_bin': 6.0, 'colsample_bytree': 0.6645176750515542, 'reg_alpha': 0.0018225057315840252, 'reg_lambda': 30.9118880488899, 'FLAML_sample_size': 364083}}\n{'Current Learner': 'lgbm', 'Current Sample': 364083, 'Current Hyper-parameters': {'n_estimators': 125.0, 'num_leaves': 186.0, 'min_child_samples': 50.0, 'learning_rate': 0.0951684364825494, 'subsample': 1.0, 'log_max_bin': 7.0, 'colsample_bytree': 0.6606135030668829, 'reg_alpha': 0.01077083294762061, 'reg_lambda': 74.25759126075202, 'FLAML_sample_size': 364083}, 'Best Learner': 'lgbm', 'Best Hyper-parameters': {'n_estimators': 125.0, 'num_leaves': 186.0, 'min_child_samples': 50.0, 'learning_rate': 0.0951684364825494, 'subsample': 1.0, 'log_max_bin': 7.0, 'colsample_bytree': 0.6606135030668829, 'reg_alpha': 0.01077083294762061, 'reg_lambda': 74.25759126075202, 'FLAML_sample_size': 364083}}\n{'Current Learner': 'lgbm', 'Current Sample': 364083, 'Current Hyper-parameters': {'n_estimators': 164.0, 'num_leaves': 304.0, 'min_child_samples': 75.0, 'learning_rate': 0.21886405778268478, 'subsample': 0.9048064340763577, 'log_max_bin': 9.0, 'colsample_bytree': 0.632220807242231, 'reg_alpha': 0.03154355161993957, 'reg_lambda': 190.9985711118577, 'FLAML_sample_size': 364083}, 'Best Learner': 'lgbm', 'Best Hyper-parameters': {'n_estimators': 164.0, 'num_leaves': 304.0, 'min_child_samples': 75.0, 'learning_rate': 0.21886405778268478, 'subsample': 0.9048064340763577, 'log_max_bin': 9.0, 'colsample_bytree': 0.632220807242231, 'reg_alpha': 0.03154355161993957, 'reg_lambda': 190.9985711118577, 'FLAML_sample_size': 364083}}\n"
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]
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}
|
|
],
|
|
"source": [
|
|
"from flaml.data import get_output_from_log\n",
|
|
"time_history, best_valid_loss_history, valid_loss_history, config_history, train_loss_history = \\\n",
|
|
" get_output_from_log(filename=settings['log_file_name'], time_budget=60)\n",
|
|
"\n",
|
|
"for config in config_history:\n",
|
|
" print(config)"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": 11,
|
|
"metadata": {
|
|
"slideshow": {
|
|
"slide_type": "slide"
|
|
}
|
|
},
|
|
"outputs": [
|
|
{
|
|
"output_type": "display_data",
|
|
"data": {
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|
"text/plain": "<Figure size 432x288 with 1 Axes>",
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\n"
|
|
},
|
|
"metadata": {
|
|
"needs_background": "light"
|
|
}
|
|
}
|
|
],
|
|
"source": [
|
|
"import matplotlib.pyplot as plt\n",
|
|
"import numpy as np\n",
|
|
"\n",
|
|
"plt.title('Learning Curve')\n",
|
|
"plt.xlabel('Wall Clock Time (s)')\n",
|
|
"plt.ylabel('Validation Accuracy')\n",
|
|
"plt.scatter(time_history, 1 - np.array(valid_loss_history))\n",
|
|
"plt.step(time_history, 1 - np.array(best_valid_loss_history), where='post')\n",
|
|
"plt.show()"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {
|
|
"slideshow": {
|
|
"slide_type": "slide"
|
|
}
|
|
},
|
|
"source": [
|
|
"## 3. Customized Learner"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {
|
|
"slideshow": {
|
|
"slide_type": "slide"
|
|
}
|
|
},
|
|
"source": [
|
|
"Some experienced automl users may have a preferred model to tune or may already have a reasonably by-hand-tuned model before launching the automl experiment. They need to select optimal configurations for the customized model mixed with standard built-in learners. \n",
|
|
"\n",
|
|
"FLAML can easily incorporate customized/new learners (preferably with sklearn API) provided by users in a real-time manner, as demonstrated below."
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {
|
|
"slideshow": {
|
|
"slide_type": "slide"
|
|
}
|
|
},
|
|
"source": [
|
|
"### Example of Regularized Greedy Forest\n",
|
|
"\n",
|
|
"[Regularized Greedy Forest](https://arxiv.org/abs/1109.0887) (RGF) is a machine learning method currently not included in FLAML. The RGF has many tuning parameters, the most critical of which are: `[max_leaf, n_iter, n_tree_search, opt_interval, min_samples_leaf]`. To run a customized/new learner, the user needs to provide the following information:\n",
|
|
"* an implementation of the customized/new learner\n",
|
|
"* a list of hyperparameter names and types\n",
|
|
"* rough ranges of hyperparameters (i.e., upper/lower bounds)\n",
|
|
"* choose initial value corresponding to low cost for cost-related hyperparameters (e.g., initial value for max_leaf and n_iter should be small)\n",
|
|
"\n",
|
|
"In this example, the above information for RGF is wrapped in a python class called *MyRegularizedGreedyForest* that exposes the hyperparameters."
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": 12,
|
|
"metadata": {
|
|
"slideshow": {
|
|
"slide_type": "slide"
|
|
}
|
|
},
|
|
"outputs": [],
|
|
"source": [
|
|
"''' SKLearnEstimator is the super class for a sklearn learner '''\n",
|
|
"from flaml.model import SKLearnEstimator\n",
|
|
"from flaml import tune\n",
|
|
"from rgf.sklearn import RGFClassifier, RGFRegressor\n",
|
|
"\n",
|
|
"\n",
|
|
"class MyRegularizedGreedyForest(SKLearnEstimator):\n",
|
|
"\n",
|
|
"\n",
|
|
" def __init__(self, task='binary:logistic', n_jobs=1, **params):\n",
|
|
" '''Constructor\n",
|
|
" \n",
|
|
" Args:\n",
|
|
" task: A string of the task type, one of\n",
|
|
" 'binary:logistic', 'multi:softmax', 'regression'\n",
|
|
" n_jobs: An integer of the number of parallel threads\n",
|
|
" params: A dictionary of the hyperparameter names and values\n",
|
|
" '''\n",
|
|
"\n",
|
|
" super().__init__(task, **params)\n",
|
|
"\n",
|
|
" '''task=regression for RGFRegressor; \n",
|
|
" binary:logistic and multiclass:softmax for RGFClassifier'''\n",
|
|
" if 'regression' in task:\n",
|
|
" self.estimator_class = RGFRegressor\n",
|
|
" else:\n",
|
|
" self.estimator_class = RGFClassifier\n",
|
|
"\n",
|
|
" # convert to int for integer hyperparameters\n",
|
|
" self.params = {\n",
|
|
" \"n_jobs\": n_jobs,\n",
|
|
" 'max_leaf': int(params['max_leaf']),\n",
|
|
" 'n_iter': int(params['n_iter']),\n",
|
|
" 'n_tree_search': int(params['n_tree_search']),\n",
|
|
" 'opt_interval': int(params['opt_interval']),\n",
|
|
" 'learning_rate': params['learning_rate'],\n",
|
|
" 'min_samples_leaf': int(params['min_samples_leaf'])\n",
|
|
" } \n",
|
|
"\n",
|
|
" @classmethod\n",
|
|
" def search_space(cls, data_size, task):\n",
|
|
" '''[required method] search space\n",
|
|
"\n",
|
|
" Returns:\n",
|
|
" A dictionary of the search space. \n",
|
|
" Each key is the name of a hyperparameter, and value is a dict with\n",
|
|
" its domain and init_value (optional), cat_hp_cost (optional) \n",
|
|
" e.g., \n",
|
|
" {'domain': tune.randint(lower=1, upper=10), 'init_value': 1}\n",
|
|
" '''\n",
|
|
" space = { \n",
|
|
" 'max_leaf': {'domain': tune.qloguniform(lower=4, upper=data_size, q=1), 'init_value': 4, 'low_cost_init_value': 4},\n",
|
|
" 'n_iter': {'domain': tune.qloguniform(lower=1, upper=data_size, q=1), 'init_value': 1, 'low_cost_init_value': 1},\n",
|
|
" 'n_tree_search': {'domain': tune.qloguniform(lower=1, upper=32768, q=1), 'init_value': 1, 'low_cost_init_value': 1},\n",
|
|
" 'opt_interval': {'domain': tune.qloguniform(lower=1, upper=10000, q=1), 'init_value': 100},\n",
|
|
" 'learning_rate': {'domain': tune.loguniform(lower=0.01, upper=20.0)},\n",
|
|
" 'min_samples_leaf': {'domain': tune.qloguniform(lower=1, upper=20, q=1), 'init_value': 20},\n",
|
|
" }\n",
|
|
" return space\n",
|
|
"\n",
|
|
" @classmethod\n",
|
|
" def size(cls, config):\n",
|
|
" '''[optional method] memory size of the estimator in bytes\n",
|
|
" \n",
|
|
" Args:\n",
|
|
" config - the dict of the hyperparameter config\n",
|
|
"\n",
|
|
" Returns:\n",
|
|
" A float of the memory size required by the estimator to train the\n",
|
|
" given config\n",
|
|
" '''\n",
|
|
" max_leaves = int(round(config['max_leaf']))\n",
|
|
" n_estimators = int(round(config['n_iter']))\n",
|
|
" return (max_leaves * 3 + (max_leaves - 1) * 4 + 1.0) * n_estimators * 8\n",
|
|
"\n",
|
|
" @classmethod\n",
|
|
" def cost_relative2lgbm(cls):\n",
|
|
" '''[optional method] relative cost compared to lightgbm\n",
|
|
" '''\n",
|
|
" return 1.0\n"
|
|
]
|
|
},
|
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{
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"cell_type": "markdown",
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"metadata": {
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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
|
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"### Add Customized Learner and Run FLAML AutoML\n",
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|
"\n",
|
|
"After adding RGF into the list of learners, we run automl by tuning hyperpameters of RGF as well as the default learners. "
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|
]
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},
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{
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"cell_type": "code",
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"execution_count": 13,
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"metadata": {
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"slideshow": {
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"slide_type": "slide"
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}
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|
},
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"outputs": [],
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"source": [
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"automl = AutoML()\n",
|
|
"automl.add_learner(learner_name='RGF', learner_class=MyRegularizedGreedyForest)"
|
|
]
|
|
},
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{
|
|
"cell_type": "code",
|
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"execution_count": 14,
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"metadata": {
|
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"slideshow": {
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|
"slide_type": "slide"
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},
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"tags": []
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},
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"outputs": [
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{
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"output_type": "stream",
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"name": "stderr",
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"text": [
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"[flaml.automl: 07-06 10:25:22] {908} INFO - Evaluation method: holdout\n",
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"[flaml.automl: 07-06 10:25:22] {607} INFO - Using StratifiedKFold\n",
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"[flaml.automl: 07-06 10:25:22] {929} INFO - Minimizing error metric: 1-accuracy\n",
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"[flaml.automl: 07-06 10:25:22] {948} INFO - List of ML learners in AutoML Run: ['RGF', 'lgbm', 'rf', 'xgboost']\n",
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"[flaml.automl: 07-06 10:25:22] {1012} INFO - iteration 0, current learner RGF\n",
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"/Users/qingyun/miniconda3/envs/py38/lib/python3.8/site-packages/rgf/utils.py:224: UserWarning: Cannot find FastRGF executable files. FastRGF estimators will be unavailable for usage.\n",
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" warnings.warn(\"Cannot find FastRGF executable files. \"\n",
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"[flaml.automl: 07-06 10:25:23] {1160} INFO - at 1.3s,\tbest RGF's error=0.3840,\tbest RGF's error=0.3840\n",
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"[flaml.automl: 07-06 10:25:23] {1012} INFO - iteration 1, current learner RGF\n",
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"[flaml.automl: 07-06 10:25:24] {1160} INFO - at 1.9s,\tbest RGF's error=0.3840,\tbest RGF's error=0.3840\n",
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"[flaml.automl: 07-06 10:25:24] {1012} INFO - iteration 2, current learner RGF\n",
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"[flaml.automl: 07-06 10:25:24] {1160} INFO - at 2.5s,\tbest RGF's error=0.3840,\tbest RGF's error=0.3840\n",
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"[flaml.automl: 07-06 10:25:24] {1012} INFO - iteration 3, current learner lgbm\n",
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"[flaml.automl: 07-06 10:25:27] {1160} INFO - at 5.3s,\tbest RGF's error=0.3840,\tbest lgbm's error=0.3519\n",
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"[flaml.automl: 07-06 10:25:31] {1012} INFO - iteration 22, current learner xgboost\n",
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"[flaml.automl: 07-06 10:25:31] {1012} INFO - iteration 25, current learner rf\n",
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"[flaml.automl: 07-06 10:25:31] {1160} INFO - at 8.9s,\tbest rf's error=0.4032,\tbest lgbm's error=0.3500\n",
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"[flaml.automl: 07-06 10:25:31] {1012} INFO - iteration 27, current learner rf\n",
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"[flaml.automl: 07-06 10:25:31] {1160} INFO - at 9.0s,\tbest rf's error=0.4028,\tbest lgbm's error=0.3500\n",
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"[flaml.automl: 07-06 10:25:32] {1160} INFO - at 10.5s,\tbest lgbm's error=0.3500,\tbest lgbm's error=0.3500\n",
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"[flaml.automl: 07-06 10:25:32] {1012} INFO - iteration 29, current learner lgbm\n",
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"[flaml.automl: 07-06 10:25:35] {1160} INFO - at 13.0s,\tbest lgbm's error=0.3440,\tbest lgbm's error=0.3440\n",
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"[flaml.automl: 07-06 10:25:35] {1012} INFO - iteration 30, current learner RGF\n",
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"[flaml.automl: 07-06 10:25:36] {1160} INFO - at 13.6s,\tbest RGF's error=0.3762,\tbest lgbm's error=0.3440\n",
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"[flaml.automl: 07-06 10:25:36] {1160} INFO - at 14.2s,\tbest RGF's error=0.3762,\tbest lgbm's error=0.3440\n",
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"[flaml.automl: 07-06 10:26:05] {1183} INFO - retrain xgboost for 6.1s\n",
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"[flaml.automl: 07-06 10:26:06] {1160} INFO - at 43.6s,\tbest xgboost's error=0.3589,\tbest lgbm's error=0.3344\n",
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"[flaml.automl: 07-06 10:26:06] {1160} INFO - at 43.7s,\tbest xgboost's error=0.3589,\tbest lgbm's error=0.3344\n",
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"[flaml.automl: 07-06 10:26:06] {1012} INFO - iteration 46, current learner lgbm\n",
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"[flaml.automl: 07-06 10:26:15] {1160} INFO - at 53.2s,\tbest lgbm's error=0.3344,\tbest lgbm's error=0.3344\n",
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"[flaml.automl: 07-06 10:26:21] {1183} INFO - retrain lgbm for 5.5s\n",
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"[flaml.automl: 07-06 10:26:21] {1012} INFO - iteration 47, current learner xgboost\n",
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"[flaml.automl: 07-06 10:26:21] {1160} INFO - at 58.9s,\tbest xgboost's error=0.3589,\tbest lgbm's error=0.3344\n",
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"[flaml.automl: 07-06 10:26:22] {1183} INFO - retrain xgboost for 1.1s\n",
|
|
"[flaml.automl: 07-06 10:26:22] {1206} INFO - selected model: LGBMClassifier(colsample_bytree=0.6204654035998071,\n",
|
|
" learning_rate=0.17783122919583272, max_bin=16,\n",
|
|
" min_child_samples=17, n_estimators=197, num_leaves=340,\n",
|
|
" objective='binary', reg_alpha=0.07967521254431058,\n",
|
|
" reg_lambda=6.332908973055842, subsample=0.8413048297641477)\n",
|
|
"[flaml.automl: 07-06 10:26:22] {963} INFO - fit succeeded\n"
|
|
]
|
|
}
|
|
],
|
|
"source": [
|
|
"settings = {\n",
|
|
" \"time_budget\": 60, # total running time in seconds\n",
|
|
" \"metric\": 'accuracy', \n",
|
|
" \"estimator_list\": ['RGF', 'lgbm', 'rf', 'xgboost'], # list of ML learners\n",
|
|
" \"task\": 'classification', # task type \n",
|
|
" \"log_file_name\": 'airlines_experiment_custom.log', # flaml log file \n",
|
|
" \"log_training_metric\": True, # whether to log training metric\n",
|
|
"}\n",
|
|
"\n",
|
|
"'''The main flaml automl API'''\n",
|
|
"automl.fit(X_train = X_train, y_train = y_train, **settings)"
|
|
]
|
|
},
|
|
{
|
|
"source": [
|
|
"## 4. Comparison with alternatives\n",
|
|
"\n",
|
|
"### FLAML's accuracy"
|
|
],
|
|
"cell_type": "markdown",
|
|
"metadata": {}
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": 15,
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"output_type": "stream",
|
|
"name": "stdout",
|
|
"text": [
|
|
"flaml accuracy = 0.6715957462586951\n"
|
|
]
|
|
}
|
|
],
|
|
"source": [
|
|
"print('flaml accuracy', '=', 1 - sklearn_metric_loss_score('accuracy', y_pred, y_test))"
|
|
]
|
|
},
|
|
{
|
|
"source": [
|
|
"### Default LightGBM"
|
|
],
|
|
"cell_type": "markdown",
|
|
"metadata": {}
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": 16,
|
|
"metadata": {},
|
|
"outputs": [],
|
|
"source": [
|
|
"from lightgbm import LGBMClassifier\n",
|
|
"lgbm = LGBMClassifier()"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": 17,
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"output_type": "execute_result",
|
|
"data": {
|
|
"text/plain": [
|
|
"LGBMClassifier()"
|
|
]
|
|
},
|
|
"metadata": {},
|
|
"execution_count": 17
|
|
}
|
|
],
|
|
"source": [
|
|
"lgbm.fit(X_train, y_train)"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": 18,
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"output_type": "stream",
|
|
"name": "stdout",
|
|
"text": [
|
|
"default lgbm accuracy = 0.6602346380315323\n"
|
|
]
|
|
}
|
|
],
|
|
"source": [
|
|
"y_pred = lgbm.predict(X_test)\n",
|
|
"from flaml.ml import sklearn_metric_loss_score\n",
|
|
"print('default lgbm accuracy', '=', 1 - sklearn_metric_loss_score('accuracy', y_pred, y_test))"
|
|
]
|
|
},
|
|
{
|
|
"source": [
|
|
"### Default XGBoost"
|
|
],
|
|
"cell_type": "markdown",
|
|
"metadata": {}
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": 19,
|
|
"metadata": {},
|
|
"outputs": [],
|
|
"source": [
|
|
"from xgboost import XGBClassifier\n",
|
|
"xgb = XGBClassifier()"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": 20,
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"output_type": "execute_result",
|
|
"data": {
|
|
"text/plain": [
|
|
"XGBClassifier(base_score=0.5, booster='gbtree', colsample_bylevel=1,\n",
|
|
" colsample_bynode=1, colsample_bytree=1, gamma=0, gpu_id=-1,\n",
|
|
" importance_type='gain', interaction_constraints='',\n",
|
|
" learning_rate=0.300000012, max_delta_step=0, max_depth=6,\n",
|
|
" min_child_weight=1, missing=nan, monotone_constraints='()',\n",
|
|
" n_estimators=100, n_jobs=0, num_parallel_tree=1, random_state=0,\n",
|
|
" reg_alpha=0, reg_lambda=1, scale_pos_weight=1, subsample=1,\n",
|
|
" tree_method='exact', validate_parameters=1, verbosity=None)"
|
|
]
|
|
},
|
|
"metadata": {},
|
|
"execution_count": 20
|
|
}
|
|
],
|
|
"source": [
|
|
"xgb.fit(X_train, y_train)"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "code",
|
|
"execution_count": 21,
|
|
"metadata": {},
|
|
"outputs": [
|
|
{
|
|
"output_type": "stream",
|
|
"name": "stdout",
|
|
"text": [
|
|
"default xgboost accuracy = 0.6676060098186078\n"
|
|
]
|
|
}
|
|
],
|
|
"source": [
|
|
"y_pred = xgb.predict(X_test)\n",
|
|
"from flaml.ml import sklearn_metric_loss_score\n",
|
|
"print('default xgboost accuracy', '=', 1 - sklearn_metric_loss_score('accuracy', y_pred, y_test))"
|
|
]
|
|
}
|
|
],
|
|
"metadata": {
|
|
"kernelspec": {
|
|
"name": "python3",
|
|
"display_name": "Python 3.8.10 64-bit ('py38': conda)"
|
|
},
|
|
"language_info": {
|
|
"codemirror_mode": {
|
|
"name": "ipython",
|
|
"version": 3
|
|
},
|
|
"file_extension": ".py",
|
|
"mimetype": "text/x-python",
|
|
"name": "python",
|
|
"nbconvert_exporter": "python",
|
|
"pygments_lexer": "ipython3",
|
|
"version": "3.8.10"
|
|
},
|
|
"interpreter": {
|
|
"hash": "4502d015faca2560a557f35a41b6dd402f7fdfc08e843ae17a9c41947939f10c"
|
|
}
|
|
},
|
|
"nbformat": 4,
|
|
"nbformat_minor": 2
|
|
} |