packaging

Core utilities for Python packages

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brettcannon dstufft pf_moore pradyunsg

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Project description

Reusable core utilities for various Python Packaging interoperability specifications.

This library provides utilities that implement the interoperability specifications which have clearly one correct behaviour (eg: PEP 440) or benefit greatly from having a single shared implementation (eg: PEP 425).

The packaging project includes the following: version handling, specifiers, markers, requirements, tags, metadata, lockfiles, utilities.

Documentation

The documentation provides information and the API for the following:

Version Handling
Specifiers
Markers
Requirements
Tags
Metadata
Lockfiles
Utilities

Installation

Use pip to install these utilities:

pip install packaging

The packaging library uses calendar-based versioning (YY.N).

Discussion

If you run into bugs, you can file them in our issue tracker.

You can also join #pypa on Freenode to ask questions or get involved.

Code of Conduct

Everyone interacting in the packaging project’s codebases, issue trackers, chat rooms, and mailing lists is expected to follow the PSF Code of Conduct.

Contributing

The CONTRIBUTING.rst file outlines how to contribute to this project as well as how to report a potential security issue. The documentation for this project also covers information about project development and security.

Project History

Please review the CHANGELOG.rst file or the Changelog documentation for recent changes and project history.

Project details

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Maintainers

brettcannon dstufft pf_moore pradyunsg

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This version

26.0

Jan 21, 2026

26.0rc3 pre-release

Jan 15, 2026

26.0rc2 pre-release

Jan 12, 2026

26.0rc1 pre-release

Jan 9, 2026

25.0

Apr 19, 2025

24.2

Nov 8, 2024

24.1

Jun 9, 2024

24.0

Mar 10, 2024

23.2

Oct 1, 2023

23.1

Apr 12, 2023

23.0

Jan 8, 2023

22.0

Dec 7, 2022

21.3

Nov 18, 2021

21.2

Oct 29, 2021

21.1

Oct 29, 2021

21.0

Jul 3, 2021

20.9

Jan 29, 2021

20.8

Dec 12, 2020

20.7

Nov 28, 2020

20.6 yanked

Nov 28, 2020

Reason this release was yanked:

Incorrect git commit was used for cutting release

20.5

Nov 27, 2020

20.4

May 19, 2020

20.3

Mar 5, 2020

20.2

Mar 5, 2020

20.1

Jan 24, 2020

20.0

Jan 6, 2020

19.2

Sep 18, 2019

19.1

Jul 30, 2019

19.0

Jan 20, 2019

18.0

Sep 26, 2018

17.1

Feb 28, 2018

17.0

Feb 28, 2018

16.8

Oct 29, 2016

16.7

Apr 23, 2016

16.6

Mar 29, 2016

16.5

Feb 26, 2016

16.4

Feb 23, 2016

16.3

Feb 22, 2016

16.2

Feb 9, 2016

16.1

Feb 8, 2016

16.0

Jan 19, 2016

15.3

Aug 2, 2015

15.2

May 13, 2015

15.1

Apr 15, 2015

15.0

Jan 3, 2015

14.5

Dec 18, 2014

14.4

Dec 15, 2014

14.3

Nov 20, 2014

14.2

Sep 10, 2014

14.1

Sep 9, 2014

14.0

Sep 5, 2014

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