mmm-fair


Namemmm-fair JSON
Version 0.2.0 PyPI version JSON
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SummaryA multi-objective multi-fairness boosting classifier
upload_time2025-02-17 17:01:29
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authorNone
requires_python>=3.11
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            ### MMM-Fair is a multi-objective, fairness-aware boosting classifier originally inspired by the paper: "Multi-fairness Under Class-Imbalance"
https://link.springer.com/chapter/10.1007/978-3-031-18840-4_21
#

The original algorithm targeted Equalized Odds (a.k.a. Disparate Mistreatment). This MMM-Fair implementation generalizes to multiple fairness objectives:
	•	Demographic Parity (DP)
	•	Equal Opportunity (EP)
	•	Equalized Odds (EO)

We further improve the approach by:
	1.	Flexible Base Learners: Any scikit-learn estimator (e.g. DecisionTreeClassifier, LogisticRegression, MLP) can be used as the base learner.
	2.	Fairness-Weighted Alpha: The boosting weight (alpha) accounts for fairness metrics alongside classification error.
	3.	Dynamic Handling of Over-Boosted Samples: Reduces excessive emphasis on specific samples once fairness goals are partially met.


## Installation

[pip install mmm-fair](##pip install mmm-fair)

Requires Python 3.11+.

Dependencies: numpy, scikit-learn, tqdm, pymoo, pandas, ucimlrepo, skl2onnx, etc.

## Usage Overview

You can import and use MMM-Fair directly:

[from mmm_fair import MMM_Fair](##from mmm_fair import MMM_Fair)
[from sklearn.tree import DecisionTreeClassifier](##from sklearn.tree import DecisionTreeClassifier)

# Suppose you have X (features), y (labels)
### 
mmm = MMM_Fair(
    estimator=DecisionTreeClassifier(max_depth=5),
    constraints="EO",        # or "DP", "EP"
    n_estimators=1000,
    random_state=42,
    # other parameters, e.g. gamma, saIndex, saValue...
)
mmm.fit(X, y)
preds = mmm.predict(X_test)

Fairness Constraints
	•	constraints="DP" → Demographic Parity
	•	constraints="EP" → Equal Opportunity
	•	constraints="EO" → Equalized Odds

Pass the relevant saIndex (sensitive attribute array) and saValue (dictionary of protected vs. non-protected group mappings) to MMM-Fair if you want it to track fairness properly for subgroups.

Train & Deploy Script

This package provides a script, train_and_deploy.py, which:
	1.	Loads data (from a known UCI dataset or a local CSV).
	2.	Specifies fairness constraints, protected attributes, and base learner.
	3.	Trains MMM-Fair with your chosen hyperparameters.
	4.	Deploys the model in ONNX or pickle format.

### Example command:

[using UCI library](https://archive.ics.uci.edu)

python -m mmm_fair.train_and_deploy \
  --dataset Adult \
  --prots race sex\
  --nprotgs White Male \
  --constraint EO \
  --base_learner Logistic\
  --deploy onnx

[using local "csv" data]

python -m mmm_fair.train_and_deploy \
  --dataset mydata.csv \
  --target label_col \
  --prots prot_1 prot_2 prot_3 \
  --nprotgs npg1 npg2 npg3 \
  --constraint EO \
  --base_learner tree \
  --deploy onnx

#### Currently the fairness intervention only implemented for categorical groups. 
#### So if protected attribute is numerical e.g. "age" then for non-protected value i.e. --nprotgs provide a range like 30_60 as argument. 


	•	Result: Multiple ONNX files (one per boosting round) plus a model_params.npy inside a directory. It’s then zipped into a .zip archive for distribution or analysis.

MAMMOth Toolkit Integration

The ONNX output and model_params.npy are designed to integrate with the [MAMMOth](https://github.com/mammoth-eu/mammoth-toolkit-releases) or the demonstrator app from the [mammoth-commons](https://github.com/mammoth-eu/mammoth-toolkit-releases) project.

By providing the .zip archive, you can:
	•	Upload it to MAMMOth,
	•	Examine bias and performance metrics across subgroups,
	•	Compare fairness trade-offs with a user-friendly interface.

Example Workflow
	1.	Choose Fairness Constraint: e.g., DP, EO, or EP.
	2.	Define sensitive attributes in saIndex and the protected-group condition in saValue.
	3.	Pick base learner (e.g., DecisionTreeClassifier(max_depth=5)).
	4.	Train with a large number of estimators (n_estimators=300 or 1000) for best performance.
	5.	Optionally do partial ensemble selection with update_theta(criteria="all") or update_theta(criteria="fairness") .
	6.	Export to ONNX or pickle for downstream usage.

References
	•	Original Paper:
“[Multi-Fairness Under Class-Imbalance](https://link.springer.com/chapter/10.1007/978-3-031-18840-4_21),”  Roy, Arjun, Vasileios Iosifidis, and Eirini Ntoutsi. International Conference on Discovery Science. Cham: Springer Nature Switzerland, 2022.


License & Contributing

This project is released under [Apache License Version 2.0].
Contributions are welcome—please open an issue or pull request on GitHub.

Contact

For questions or collaborations, please contact [arjun.roy@unibw.de](mailto:arjun.roy@unibw.de) 
Check out the source code at: [GITHUB](https://github.com/arjunroyihrpa/MMM_fair).

            

Raw data

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    "author_email": "Arjun Roy <arjunroyihrpa@gmail.com>",
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    "description": "### MMM-Fair is a multi-objective, fairness-aware boosting classifier originally inspired by the paper: \"Multi-fairness Under Class-Imbalance\"\nhttps://link.springer.com/chapter/10.1007/978-3-031-18840-4_21\n#\n\nThe original algorithm targeted Equalized Odds (a.k.a. Disparate Mistreatment). This MMM-Fair implementation generalizes to multiple fairness objectives:\n\t\u2022\tDemographic Parity (DP)\n\t\u2022\tEqual Opportunity (EP)\n\t\u2022\tEqualized Odds (EO)\n\nWe further improve the approach by:\n\t1.\tFlexible Base Learners: Any scikit-learn estimator (e.g. DecisionTreeClassifier, LogisticRegression, MLP) can be used as the base learner.\n\t2.\tFairness-Weighted Alpha: The boosting weight (alpha) accounts for fairness metrics alongside classification error.\n\t3.\tDynamic Handling of Over-Boosted Samples: Reduces excessive emphasis on specific samples once fairness goals are partially met.\n\n\n## Installation\n\n[pip install mmm-fair](##pip install mmm-fair)\n\nRequires Python 3.11+.\n\nDependencies: numpy, scikit-learn, tqdm, pymoo, pandas, ucimlrepo, skl2onnx, etc.\n\n## Usage Overview\n\nYou can import and use MMM-Fair directly:\n\n[from mmm_fair import MMM_Fair](##from mmm_fair import MMM_Fair)\n[from sklearn.tree import DecisionTreeClassifier](##from sklearn.tree import DecisionTreeClassifier)\n\n# Suppose you have X (features), y (labels)\n### \nmmm = MMM_Fair(\n    estimator=DecisionTreeClassifier(max_depth=5),\n    constraints=\"EO\",        # or \"DP\", \"EP\"\n    n_estimators=1000,\n    random_state=42,\n    # other parameters, e.g. gamma, saIndex, saValue...\n)\nmmm.fit(X, y)\npreds = mmm.predict(X_test)\n\nFairness Constraints\n\t\u2022\tconstraints=\"DP\" \u2192 Demographic Parity\n\t\u2022\tconstraints=\"EP\" \u2192 Equal Opportunity\n\t\u2022\tconstraints=\"EO\" \u2192 Equalized Odds\n\nPass the relevant saIndex (sensitive attribute array) and saValue (dictionary of protected vs. non-protected group mappings) to MMM-Fair if you want it to track fairness properly for subgroups.\n\nTrain & Deploy Script\n\nThis package provides a script, train_and_deploy.py, which:\n\t1.\tLoads data (from a known UCI dataset or a local CSV).\n\t2.\tSpecifies fairness constraints, protected attributes, and base learner.\n\t3.\tTrains MMM-Fair with your chosen hyperparameters.\n\t4.\tDeploys the model in ONNX or pickle format.\n\n### Example command:\n\n[using UCI library](https://archive.ics.uci.edu)\n\npython -m mmm_fair.train_and_deploy \\\n  --dataset Adult \\\n  --prots race sex\\\n  --nprotgs White Male \\\n  --constraint EO \\\n  --base_learner Logistic\\\n  --deploy onnx\n\n[using local \"csv\" data]\n\npython -m mmm_fair.train_and_deploy \\\n  --dataset mydata.csv \\\n  --target label_col \\\n  --prots prot_1 prot_2 prot_3 \\\n  --nprotgs npg1 npg2 npg3 \\\n  --constraint EO \\\n  --base_learner tree \\\n  --deploy onnx\n\n#### Currently the fairness intervention only implemented for categorical groups. \n#### So if protected attribute is numerical e.g. \"age\" then for non-protected value i.e. --nprotgs provide a range like 30_60 as argument. \n\n\n\t\u2022\tResult: Multiple ONNX files (one per boosting round) plus a model_params.npy inside a directory. It\u2019s then zipped into a .zip archive for distribution or analysis.\n\nMAMMOth Toolkit Integration\n\nThe ONNX output and model_params.npy are designed to integrate with the [MAMMOth](https://github.com/mammoth-eu/mammoth-toolkit-releases) or the demonstrator app from the [mammoth-commons](https://github.com/mammoth-eu/mammoth-toolkit-releases) project.\n\nBy providing the .zip archive, you can:\n\t\u2022\tUpload it to MAMMOth,\n\t\u2022\tExamine bias and performance metrics across subgroups,\n\t\u2022\tCompare fairness trade-offs with a user-friendly interface.\n\nExample Workflow\n\t1.\tChoose Fairness Constraint: e.g., DP, EO, or EP.\n\t2.\tDefine sensitive attributes in saIndex and the protected-group condition in saValue.\n\t3.\tPick base learner (e.g., DecisionTreeClassifier(max_depth=5)).\n\t4.\tTrain with a large number of estimators (n_estimators=300 or 1000) for best performance.\n\t5.\tOptionally do partial ensemble selection with update_theta(criteria=\"all\") or update_theta(criteria=\"fairness\") .\n\t6.\tExport to ONNX or pickle for downstream usage.\n\nReferences\n\t\u2022\tOriginal Paper:\n\u201c[Multi-Fairness Under Class-Imbalance](https://link.springer.com/chapter/10.1007/978-3-031-18840-4_21),\u201d  Roy, Arjun, Vasileios Iosifidis, and Eirini Ntoutsi. International Conference on Discovery Science. Cham: Springer Nature Switzerland, 2022.\n\n\nLicense & Contributing\n\nThis project is released under [Apache License Version 2.0].\nContributions are welcome\u2014please open an issue or pull request on GitHub.\n\nContact\n\nFor questions or collaborations, please contact [arjun.roy@unibw.de](mailto:arjun.roy@unibw.de) \nCheck out the source code at: [GITHUB](https://github.com/arjunroyihrpa/MMM_fair).\n",
    "bugtrack_url": null,
    "license": "Apache License\n                                   Version 2.0, January 2004\n                                http://www.apache.org/licenses/\n        \n        TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n        \n        1. Definitions.\n        \n           \"License\" shall mean the terms and conditions for use, reproduction,\n           and distribution as defined by Sections 1 through 9 of this document.\n        \n           \"Licensor\" shall mean the copyright owner or entity authorized by\n           the copyright owner that is granting the License.\n        \n           \"Legal Entity\" shall mean the union of the acting entity and all\n           other entities that control, are controlled by, or are under common\n           control with that entity. For the purposes of this definition,\n           \"control\" means (i) the power, direct or indirect, to cause the\n           direction or management of such entity, whether by contract or\n           otherwise, or (ii) ownership of fifty percent (50%) or more of the\n           outstanding shares, or (iii) beneficial ownership of such entity.\n        \n           \"You\" (or \"Your\") shall mean an individual or Legal Entity\n           exercising permissions granted by this License.\n        \n           \"Source\" form shall mean the preferred form for making modifications,\n           including but not limited to software source code, documentation\n           source, and configuration files.\n        \n           \"Object\" form shall mean any form resulting from mechanical\n           transformation or translation of a Source form, including but\n           not limited to compiled object code, generated documentation,\n           and conversions to other media types.\n        \n           \"Work\" shall mean the work of authorship, whether in Source or\n           Object form, made available under the License, as indicated by a\n           copyright notice that is included in or attached to the work\n           (an example is provided in the Appendix below).\n        \n           \"Derivative Works\" shall mean any work, whether in Source or Object\n           form, that is based on (or derived from) the Work and for which the\n           editorial revisions, annotations, elaborations, or other modifications\n           represent, as a whole, an original work of authorship. For the purposes\n           of this License, Derivative Works shall not include works that remain\n           separable from, or merely link (or bind by name) to the interfaces of,\n           the Work and Derivative Works thereof.\n        \n           \"Contribution\" shall mean any work of authorship, including\n           the original version of the Work and any modifications or additions\n           to that Work or Derivative Works thereof, that is intentionally\n           submitted to Licensor for inclusion in the Work by the copyright\n           owner or by an individual or Legal Entity authorized to submit on\n           behalf of the copyright owner. For the purposes of this definition,\n           \"submitted\" means any form of electronic, verbal, or written\n           communication sent to the Licensor or its representatives, including\n           but not limited to communication on electronic mailing lists, source\n           code control systems, and issue tracking systems that are managed by,\n           or on behalf of, the Licensor for the purpose of discussing and\n           improving the Work, but excluding communication that is conspicuously\n           marked or otherwise designated in writing by the copyright owner\n           as \"Not a Contribution.\"\n        \n           \"Contributor\" shall mean Licensor and any individual or Legal Entity\n           on behalf of whom a Contribution has been received by Licensor and\n           subsequently incorporated within the Work.\n        \n        2. Grant of Copyright License. Subject to the terms and conditions of\n           this License, each Contributor hereby grants to You a perpetual,\n           worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n           copyright license to reproduce, prepare Derivative Works of,\n           publicly display, publicly perform, sublicense, and distribute the\n           Work and such Derivative Works in Source or Object form.\n        \n        3. Grant of Patent License. Subject to the terms and conditions of\n           this License, each Contributor hereby grants to You a perpetual,\n           worldwide, non-exclusive, no-charge, royalty-free, irrevocable\n           (except as stated in this section) patent license to make, have made,\n           use, offer to sell, sell, import, and otherwise transfer the Work,\n           where such license applies only to those patent claims licensable\n           by such Contributor that are necessarily infringed by their\n           Contribution(s) alone or by combination of their Contribution(s)\n           with the Work to which such Contribution(s) was submitted. If You\n           institute patent litigation against any entity (including a\n           cross-claim or counterclaim in a lawsuit) alleging that the Work\n           or a Contribution incorporated within the Work constitutes direct\n           or contributory patent infringement, then any patent licenses\n           granted to You under this License for that Work shall terminate\n           as of the date such litigation is filed.\n        \n        4. Redistribution. You may reproduce and distribute copies of the\n           Work or Derivative Works thereof in any medium, with or without\n           modifications, and in Source or Object form, provided that You\n           meet the following conditions:\n        \n           (a) You must give any other recipients of the Work or\n               Derivative Works a copy of this License; and\n        \n           (b) You must cause any modified files to carry prominent notices\n               stating that You changed the files; and\n        \n           (c) You must retain, in the Source form of any Derivative Works\n               that You distribute, all copyright, patent, trademark, and\n               attribution notices from the Source form of the Work,\n               excluding those notices that do not pertain to any part of\n               the Derivative Works; and\n        \n           (d) If the Work includes a \"NOTICE\" text file as part of its\n               distribution, then any Derivative Works that You distribute must\n               include a readable copy of the attribution notices contained\n               within such NOTICE file, excluding those notices that do not\n               pertain to any part of the Derivative Works, in at least one\n               of the following places: within a NOTICE text file distributed\n               as part of the Derivative Works; within the Source form or\n               documentation, if provided along with the Derivative Works; or,\n               within a display generated by the Derivative Works, if and\n               wherever such third-party notices normally appear. The contents\n               of the NOTICE file are for informational purposes only and\n               do not modify the License. You may add Your own attribution\n               notices within Derivative Works that You distribute, alongside\n               or as an addendum to the NOTICE text from the Work, provided\n               that such additional attribution notices cannot be construed\n               as modifying the License.\n        \n           You may add Your own copyright statement to Your modifications\n           and may provide additional or different license terms and conditions\n           for use, reproduction, or distribution of Your modifications, or\n           for any such Derivative Works as a whole, provided Your use,\n           reproduction, and distribution of the Work otherwise complies with\n           the conditions stated in this License.\n        \n        5. Submission of Contributions. Unless You explicitly state otherwise,\n           any Contribution intentionally submitted for inclusion in the Work\n           by You to the Licensor shall be under the terms and conditions of\n           this License, without any additional terms or conditions.\n           Notwithstanding the above, nothing herein shall supersede or modify\n           the terms of any separate license agreement you may have executed\n           with Licensor regarding such Contributions.\n        \n        6. Trademarks. This License does not grant permission to use the trade\n           names, trademarks, service marks, or product names of the Licensor,\n           except as required for reasonable and customary use in describing the\n           origin of the Work and reproducing the content of the NOTICE file.\n        \n        7. Disclaimer of Warranty. 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