AutoX是一个高效的自动化机器学习工具，它主要针对于表格类型的数据挖掘竞赛。 它的特点包括: 效果出色、简单易用、通用、自动化、灵活。

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Machine LearningAutoX
Overview

English | 简体中文

AutoX是什么？

AutoX一个高效的自动化机器学习工具，它主要针对于表格类型的数据挖掘竞赛。 它的特点包括:

  • 效果出色: AutoX在多个kaggle数据集上，效果显著优于其他解决方案(见效果对比)。
  • 简单易用: AutoX的接口和sklearn类似，方便上手使用。
  • 通用: 适用于分类和回归问题。
  • 自动化: 无需人工干预，全自动的数据清洗、特征工程、模型调参等步骤。
  • 灵活性: 各组件解耦合，能单独使用，对于自动机器学习效果不满意的地方，可以结合专家知识，AutoX提供灵活的接口。
  • 比赛上分点总结：整理并公开历史比赛的上分点。

目录

安装

1. git clone https://github.com/4paradigm/autox.git
2. cd autox
3. python setup.py install

架构

├── autox
│   ├── ensemble
│   ├── feature_engineer
│   ├── feature_selection
│   ├── file_io
│   ├── join_tables
│   ├── metrics
│   ├── models
│   ├── process_data
│   └── util.py
│   ├── CONST.py
│   ├── autox.py
├── run_oneclick.py
└── demo
└── test
├── setup.py
├── README.md

快速上手

  • 全自动: 适合于想要快速获得一个不错结果的用户。只需要配置最少的数据信息，就能完成机器学习全流程的构建。
from autox import AutoX
path = data_dir
autox = AutoX(target = 'loss', train_name = 'train.csv', test_name = 'test.csv', 
               id = ['id'], path = path)
sub = autox.get_submit()
sub.to_csv("submission.csv", index = False)
  • 半自动: run_demo.ipynb
适合于想要获得更优预测结果的用户。AutoX提供了易用且丰富的接口，用户可以方便地根据实际数据场景进行配置，以获得更优的预测结果。

效果对比：

index data_type data_name(link) AutoX AutoGluon H2o
1 regression zhidemai 1.1231 1.9466 1.1927
2 regression Tabular Playground Series - Aug 2021 7.87731 10.3944 7.8895
3 binary classification Titanic x 0.78229 0.79186

数据类型

  • cat: Categorical，类别型无序变量
  • ord: Ordinal，类别型有序变量
  • num: Numeric，连续型变量
  • datetime: Datetime型时间变量
  • timestamp: imestamp型时间变量

pipeline的逻辑

  • 1.初始化AutoX类
1.1 读数据
1.2 合并train和test
1.3 识别数据表中列的类型
1.4 数据预处理
  • 2.特征工程
特征工程包含单表特征和多表特征。
每一个特征工程类都包含以下功能：
    一、自动筛选要执行当前操作的特征；
    二、查看筛选出来的特征
    三、修改要执行当前操作的特征
    四、执行特征数据的计算，返回和主表样本条数以及顺序一致的特征
  • 3.特征合并
将构造出来的特征进行合并，行数不变，列数增加，返回大的宽表
  • 4.训练集和测试集的划分
将宽表划分成训练集和测试集
  • 5.特征过滤
通过train和test的特征列数据分布情况，对构造出来的特征进行过滤，避免过拟合
  • 6.模型训练
利用过滤后的宽表特征对模型进行训练
模型类提供功能包括：
    一、查看模型默认参数；
    二、模型训练；
    三、模型调参；
    四、查看模型对应的特征重要性；
    五、模型预测
  • 7.模型预测

AutoX类

AutoX类自动为用户管理数据集和数据集信息。
初始化AutoX类之后会执行以下操作：
一、读数据；
二、合并train和test；
三、识别数据表中列的类型；
四、数据预处理。

属性

info_: info_属性用于保存数据集的信息。

  • info_['id']: List，用于标识数据表唯一的Key
  • info_['target']: String，用于标识数据表的标签列
  • info_['shape_of_train']: Int，train数据集的数据样本条数
  • info_['shape_of_test']: Int，test数据集的数据样本条数
  • info_['feature_type']: Dict of Dict，标识数据表中特征列的数据类型
  • info_['train_name']: String，用于训练集主表表名
  • info_['test_name']: String，用于测试集主表表名

dfs_: dfs_属性用于保存所有的DataFrame，包含原始表数据和构造的表数据。

  • dfs_['train_test']: train数据和test数据合并后的数据
  • dfs_['FE_feature_name']:特征工程所构造出的数据，例如FE_count，FE_groupby
  • dfs_['FE_all']:原始特征和所有特征工程合并后的数据集

方法

  • concat_train_test: 将训练集和测试集拼接起来，一般在读取数据之后执行
  • split_train_test: 将训练集和测试集分开，一般在完成特征工程之后执行
  • get_submit: 获得预测结果(中间过程执行了完成的机器学习pipeline，包括数据预处理，特征工程，模型训练，模型调参，模型融合，模型预测等)

AutoX的pipeline中的操作对应的具体细节：

读数据

读取给定路径下的所有文件。默认情况下，会将训练集主表和测试集主表进行拼接，
再进行后续的数据预处理以及特征工程等操作，并在模型预测开始前，将训练集和测试进行拆分。

数据预处理

- 对时间列解析年, 月, 日, 时、星期几等信息
- 在每次训练前，会对输入到模型的数据删除无效(nunique为1)的特征
- 去除异常样本，去除label为nan的样本

特征工程

  • 1-1拼表特征
  • 1-M拼表特征
- time diff特征
- 聚合统计类特征
  • count特征
对要操作的特征列，将全体数据集中，和当前样本特征属性一致的样本计数作为特征

  • target encoding特征

  • 统计类特征

使用两层for训练提取统计类特征。
第一层for循环遍历所有筛选出来的分组特征(group_col)，
第二层for循环遍历所有筛选出来的聚合特征(agg_col)，
在第二层for循环中，
若遇到类别型特征，计算的统计特征为nunique，
若遇到数值型特征，计算的统计特征包括[median, std, sum, max, min, mean].
  • shift特征

模型训练

AutoX目前支持以下模型，默认情况下，会对Lightgbm模型进行训练：
1. Lightgbm；
2. AutoX 深度神经网络。

模型融合

AutoX支持的模型融合方式包括一下两种，默认情况下，不进行融合。
1. Stacking；
2. Bagging。

比赛上分点总结：

kaggle criteo: 对于nunique很大的特征列，进行分桶操作。例如，对于nunique大于10000的特征，做hash后截断保留4位，再进行label_encode。 zhidemai: article_id隐含了时间信息，增加article_id的排序特征。例如，groupby(['date'])['article_id'].rank()。

错误排查

错误信息 解决办法
Comments
  • AutoX_Recommend, 数据集处理: kdd cup 2020

    AutoX_Recommend, 数据集处理: kdd cup 2020

    原始数据地址: https://tianchi.aliyun.com/competition/entrance/231785/introduction 数据处理方法参考: https://github.com/4paradigm/AutoX/blob/master/autox/autox_recommend/data_process/MovieLens_data_process.ipynb 以及 https://github.com/4paradigm/AutoX/blob/master/autox/autox_recommend/data_process/Netflix-data-process.ipynb

    call-for-contributions AutoX_Recommend 
    opened by poteman 1
  • AutoX_Recommend, 数据集处理: Amazon product data

    AutoX_Recommend, 数据集处理: Amazon product data

    原始数据地址: http://jmcauley.ucsd.edu/data/amazon/ 数据处理方法参考: https://github.com/4paradigm/AutoX/blob/master/autox/autox_recommend/data_process/MovieLens_data_process.ipynb 以及 https://github.com/4paradigm/AutoX/blob/master/autox/autox_recommend/data_process/Netflix-data-process.ipynb

    call-for-contributions AutoX_Recommend 
    opened by poteman 1
  • AutoX_Recommend, 数据集处理: Amazon electronic product recommendation

    AutoX_Recommend, 数据集处理: Amazon electronic product recommendation

    原始数据地址: https://www.kaggle.com/datasets/prokaggler/amazon-electronic-product-recommendation 数据处理方法参考: https://github.com/4paradigm/AutoX/blob/master/autox/autox_recommend/data_process/MovieLens_data_process.ipynb 以及 https://github.com/4paradigm/AutoX/blob/master/autox/autox_recommend/data_process/Netflix-data-process.ipynb

    call-for-contributions AutoX_Recommend 
    opened by poteman 1
  • ModuleNotFoundError: No module named 'autox.autox_server'

    ModuleNotFoundError: No module named 'autox.autox_server'

    git clone https://github.com/4paradigm/AutoX.git pip install pytorch_tabnet pip install ./AutoX python from autox import AutoX

    ModuleNotFoundError: No module named 'autox.autox_server'

    opened by utopianet 1
  • lightgbm.train bug(lightgbm==3.3.2.99)

    lightgbm.train bug(lightgbm==3.3.2.99)

    Mac中 lightgbm==3.3.2.99， lightgbm.train不再包含verbose_eval和early_stopping_rounds接口，改用callbacks接口，调用lgb模型时会报错

    File ~/miniforge3/envs/lx/lib/python3.9/site-packages/autox/autox_competition/models/regressor_ts.py:231, in LgbRegressionTs.fit(self, train, test, used_features, target, time_col, ts_unit, Early_Stopping_Rounds, N_round, Verbose, log1p, custom_metric, weight_for_mae)
    226     model = lgb.train(self.params_, trn_data, num_boost_round=self.N_round, valid_sets=[trn_data, val_data],
    227                       verbose_eval=self.Verbose,
    228                       early_stopping_rounds=self.Early_Stopping_Rounds,
    229                       feval=weighted_mae_lgb(weight=weight_for_mae))
    230 else:
--> 231     model = lgb.train(self.params_, trn_data, num_boost_round=self.N_round, valid_sets=[trn_data, val_data],
...
    233                     early_stopping_rounds=self.Early_Stopping_Rounds)
    234 val = model.predict(train.iloc[valid_idx][used_features])
    235 if log1p:

TypeError: train() got an unexpected keyword argument 'verbose_eval'
    opened by LXlearning 0
  • AutoX_NLP/ nlp_feature.py,glove环境适配

    AutoX_NLP/ nlp_feature.py,glove环境适配

    opened by DHengW 0
  • AutoX_NLP/ nlp_feature.py, OOV问题优化

    AutoX_NLP/ nlp_feature.py, OOV问题优化

    opened by DHengW 0
  • AutoX_NLP/ nlp_feature.py, fasttext处理效率优化

    AutoX_NLP/ nlp_feature.py, fasttext处理效率优化

    opened by DHengW 0
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