How to install mypy

Mypy is optional static type checker for Python. The project is developed in the open and released under its own licence.

About the project

Mypy is optional static type checker for Python. The maintainers own the project, choose releases, and publish their own documentation. This page records a few things worth knowing before you begin.

Governance sits with the project's own team. They decide what ships, how often it ships, and which platforms are supported.

How releases reach a machine

Projects of this kind are usually reached through the operating system's package index, through a language-specific registry, or by building the published source tree. Which route applies depends on the platform and on the maintainers' own guidance.

Check compatibility first

Confirm the platform is supported by the current release. Tooling in this space moves quickly, and an older system often falls outside the supported range.

Once it is in place

If the outcome differs from what you expected, the cause is nearly always resolution rather than the project itself — an older copy, a different channel, or a stale cache.

About these pages

These pages are maintained as reading notes. No project files are stored here.