---
id: mypy-extensions
version: "1.1.0"
license: unclear
license_treatment: unclear
maintenance: aging
---

# mypy-extensions — Type system extensions for programs checked with the mypy type checker.

License: unclear · Maintenance: aging · Popularity: top 1,000 on PyPI

## Install

pip install mypy-extensions
uv add mypy-extensions
poetry add mypy-extensions

## Description

Mypy Extensions
===============

The `mypy_extensions` module defines extensions to the Python standard
library `typing` module that are supported by the mypy type checker and
the mypyc compiler.

## AI interpretation — verify before relying

Provides type system extensions to Python's `typing` module that are recognized by the mypy type checker and mypyc compiler, enabling advanced type annotations beyond the standard library.

Verdict: A stable, lightweight utility for mypy users seeking advanced type annotations. Zero security vulnerabilities and no dependencies make it safe to adopt. The unclear license and aging maintenance cadence warrant verification before production use, though the active repository and top-1000 popularity suggest ongoing community reliance.

[View on SkillFed](https://skillfed.io/packages/mypy-extensions) · [View on PyPI](https://pypi.org/project/mypy-extensions/)