PyPI · #417 most downloaded on PyPI

installer

1.0.150M downloads/mopypa/installer ↗New releases in your daily digest, changelog included.

A library for installing Python wheels.

Last release 4 months ago
11 May 2026
Ships unpredictably
gaps range from 2 weeks to 3.0 years
Nearly every release is documented
notes for 12 of 12 stable releases
2 versions withdrawn
withdrawn after publishing
8 years old
15 releases · first in 2018

Release timeline

15 releases since 2018

2018202020222024

Releases

1.0.111 May 20262 sources agree
Include docs and tests in sdist again
v1.0.1 (May 11, 2026)

Include docs and tests in sdist again (#322)

Fix long path issue on Windows (#321)

Fix date in changelog (#324)

Use os.path.abspath() instead of Path.resolve() for performance (#326)
Open source →
1.0.028 Mar 20262 sources agree
Drop support for Python 3.9, 3.8, and 3.7 ( #305 , #242 , #206 )
v1.0.0 (Mar 28, 2025)

Drop support for Python 3.9, 3.8, and 3.7 (#305, #242, #206)

Add support and Python 3.13 and 3.14 (#201, #282)

Add --overwrite-existing CLI option (#216)

Add --validate-record CLI option (#161)

Support installing multiple wheels (#203)

Handle invalid hash algorithms (#179)

Stream-based validation instead of in-memory (#98)

Add validate_stream methods (#99)

Consolidate and refine validation APIs (#108, #111)

Sort entries before writing RECORD (#245)

Do not install pycache from wheels (#307)

Fix a path traversal bug (#317)

Update launcher scripts and Windows behavior (#212, #181)

Fix Windows relpath bug (#286)

Migrate to dataclasses (#200)

Use cached_property for memoization (#243)

Refactor installer.scripts (#239)

Decouple test modules (#104)

Avoid cross-module imports from .utils (#102)

Lazy imports for performance (#226)

Complete type annotations and enforce strict mypy (#173)

Deprecate RecordEntry.validate (#186)

Fix documentation typos and grammar (#309, #210)

Improve docstrings and internal documentation (#100)

One column per quarter.

0.7.017 Mar 2023

Improve handling of non-normalized .dist-info folders

Improve handling of non-normalized .dist-info folders (#168)
Explicitly use policy=compat32 (#163)
Normalize RECORD file paths when parsing (#152)
Search wheels for .dist-info directories (#137)
Separate validation of RECORD (#147, #167)

Open source →

0.6.07 Dec 2022

Encode hashes in RECORD files correctly

Add support for Python 3.11 (#154)
Encode hashes in RECORD files correctly (#141)
Add py.typed marker file (#138)
Implement --prefix option (#103)
Fix the unbound is_executable (#115)
Construct RECORD file using csv.writer (#118)
Move away from import installer.xyz style imports (#110)
Improve existing documentation content (typos, formatting) (#109)

Open source →

0.5.111 Mar 2022

Change all names in installer.__main__ to be underscore prefixed.

Change all names in installer.__main__ to be underscore prefixed.
Update project URL after move to the pypa organisation.
Rewrite imports to be compatible with vendoring.

Open source →

0.5.016 Feb 2022

Add a CLI, to install a wheel into the currently-running Python.

Add a CLI, to install a wheel into the currently-running Python.
Convert Windows paths to / separated when writing RECORD.
Drop support for Python 3.6 and lower.
Preserve the executable bit from wheels being installed.
Write records in RECORD with relative paths.
Improve API documentation.

Open source →

0.4.013 Oct 2021

Pass schemes into {any}WheelDestination.finalize_installation.

Pass schemes into {any}WheelDestination.finalize_installation.

Open source →

0.3.011 Oct 2021

Add support for ARM 64 executables on Windows.

Add support for ARM 64 executables on Windows.
Improve handling of wheels that contain entries for directories.

Open source →

0.2.328 Jul 2021

Fix entry point handling in {any}installer.install.

Fix entry point handling in {any}installer.install.

Open source →

0.2.215 May 2021

Teach {any}SchemeDictionaryDestination to create subfolders.

Teach {any}SchemeDictionaryDestination to create subfolders.

Open source →

0.2.115 May 2021

Change {any}parse_record_file to yield the elements as a tuple, instead of {any}RecordEntry objects.

Change {any}parse_record_file to yield the elements as a tuple, instead of {any}RecordEntry objects.
Implement {any}WheelFile, completing the end-to-end wheel installation pipeline.
Generate {any}RecordEntry for RECORD file in the {any}installer.install, instead of requiring every WheelDestination implementation to do the exact same thing.

Open source →

0.2.03 May 2021

Thank you to [Dan Ryan] and [Tzu-ping Chung] for the project name on PyPI. The PyPI releases before 0.2.0 come from and have been [yanked].

Initial release.

Thank you to Dan Ryan and Tzu-ping Chung for the project name on PyPI. The PyPI releases before 0.2.0 come from https://github.com/sarugaku/installer and have been yanked.

Open source →

0.2.0.dev03 May 2021pre-release

Nothing published for this version

0.1.123 Sept 2018withdrawn: Project scope and design has significantly.

Nothing published for this version

0.1.021 Sept 2018withdrawn: Project scope and design has significantly.

Nothing published for this version

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installer

Release timeline

Releases

v1.0.1 (May 11, 2026)

v1.0.0 (Mar 28, 2025)