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Python Install Manager Python Software Foundation

language programming programming-language py python python3 script
Use this command to install Python Install Manager:
winget install --id=Python.PythonInstallManager -e

The Python Install Manager is a tool designed to simplify the installation, management, and launching of Python on Windows. It streamlines the process of working with Python environments, allowing users to efficiently handle multiple installations and configurations.

Key Features:

  • Centralized Management: Easily install, update, or remove Python versions directly through the command line.
  • Command-Line Integration: The "py" command provides a unified interface for launching Python scripts and managing environments.
  • Cross-Version Compatibility: Supports various Python versions, making it ideal for developers working on multiple projects with different requirements.
  • Open Source and Community-Driven: Developed by the Python community to ensure compatibility and reliability across Windows systems.

Audience & Benefit:

Ideal for developers, data scientists, and IT professionals who work with Python on Windows. The tool enables seamless management of Python installations, reducing manual effort and ensuring consistent environments across projects. By simplifying Python setup and maintenance, it enhances productivity and streamlines workflows.

The Python Install Manager is a reliable solution for anyone looking to manage Python efficiently on Windows.

README

Python Install Manager

Codecov

This is the source code for the Python Install Manager app.

For information about how to use the Python install manager, including troubleshooting steps, please refer to the documentation at docs.python.org/using/windows.

The original PEP leading to this tool was PEP 773.

Build

To build and run locally requires pymsbuild and a Visual Studio installation that includes the C/C++ compilers.

> python -m pip install pymsbuild
> python -m pymsbuild
> python-manager\py.exe ...

Any modification to a source file requires rebuilding. The .py files are packaged into an extension module. However, see the following section on tests, as test runs do not require a full build.

For additional output, set %PYMANAGER_DEBUG% to force debug-level output. This is the equivalent of passing -vv, though it also works for contexts that do not accept options (such as launching a runtime).

Tests

To run the test suite locally:

> python -m pip install pymsbuild pytest
> python -m pymsbuild -c _msbuild_test.py
> python -m pytest

This builds the native components separately so that you can quickly iterate on the Python code. Any updates to the C++ files will require running the pymsbuild step again.

Package

To produce an (almost) installer app package:

> python -m pip install pymsbuild
> python make-all.py

This will rebuild the project and produce MSIX, APPXSYM and MSI packages.

You will need to sign the MSIX package before you can install it. This can be a self-signed certificate, but it must be added to your Trusted Publishers. Alternatively, rename the file to .zip and extract it to a directory, and run Add-AppxPackage -Register \appxmanifest.xml to do a development install. This should add the global aliases and allow you to test as if it was properly installed.

Contributions

Contributions are welcome under all the same conditions as for CPython, see the Python Developer's Guide for more information.

Release Schedule

Versions
25.0.240.0
25.0.191.0
25.0.190.0
25.0.189.0
25.0.188.0
25.0.187.0
25.0.186.0
Website
github.com
License
Last updated
10/8/2025

The release manager for the Python Install Manager on Windows is whoever is the build manager for Windows for CPython. Currently, this is @zooba.

Releases are made as needed, with prereleases made at the release manager's judgement. Due to the broad user base of PyManager, we have to avoid significant changes to its interface, which means feature development is heavily restricted.

Versioning

PyManager uses the two digit year as the first part of the version, with the second part incrementing for each release. This is to avoid any sense of features being tied to the version number, and to avoid any direct association with Python releases.

The two digit year is used because MSI does not support major version fields over 256. If/when we completely drop the MSI, we could switch to four digit years, but as long as it exists we have to handle its compatibility constraints.

Copyright and License Information

Copyright © 2025 Python Software Foundation. All rights reserved.

See the LICENSE for information on the terms & conditions for usage, and a DISCLAIMER OF ALL WARRANTIES.

All trademarks referenced herein are property of their respective holders.