pyenv

Spec sheet

Purpose

pyenv lets users switch between multiple Python versions.Read 5 Oct 2026 · github.com

Security

The v2.8.0 changelog lists a fix for CVE-2026-68939 involving glob character handling in .python-version.Read 5 Oct 2026 · github.com

License

The repository identifies pyenv as MIT licensed.Read 5 Oct 2026 · github.com

Builds

Most pyenv-provided Python releases are built from source during installation, and Python build dependencies must be installed first.Read 5 Oct 2026 · github.com

Distributions

It supports CPython, PyPy, Stackless Python, Jython, and other Python distributions.Read 5 Oct 2026 · github.com

Installation

The README documents installation on Linux/Unix and macOS, including a shell installer, Git checkout, and Homebrew.Read 5 Oct 2026 · github.com

Multiple versions

Users can make multiple installed Python versions available at once, including for cross-version testing with tox.Read 5 Oct 2026 · github.com

Plugins

The project supports extending and customizing functionality with plugins.Read 5 Oct 2026 · github.com

Shims

It intercepts Python commands through shim executables added to PATH and routes them to the selected installation.Read 5 Oct 2026 · github.com

Version selection

It supports global per-user and per-project Python versions, plus overrides through an environment variable.Read 5 Oct 2026 · github.com

Virtual environments

pyenv does not manage virtual environments itself; the project points users to virtualenv or the pyenv-virtualenv plugin.Read 5 Oct 2026 · github.com

Windows support

The project says it does not officially support Windows and does not work outside Windows Subsystem for Linux; it recommends the pyenv-win fork for native Windows Python versions.Read 5 Oct 2026 · github.com

Plans and prices

Every pyenv plan and price →

Where Specifiction places it

• Runtime Version Managers#19 of 307.4
• Development Environment Managers#39 of 507.3