python/mypy

Optional static typing for Python observed · 2026-10-17

github.com/python/mypy · homepage · Python · NOASSERTION (other) observed · 2026-10-17

Health v2 · maintenance only

77/100

Activity 100
Release rhythm 35
Longevity 100

Flags: no_releases no_license

How is this computed?

round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.

gap_med: n/a
age_days: 5065
days_rel: n/a
days_push: 4
n_releases_24m: 0

Full methodology

Adoption not part of the score

20684 stars · 3334 forks observed · 2026-10-17

What it is AI-extracted, prompt v1, taxonomy v1, 2026-10-19, confidence 0.97

Mypy is an optional static type checker for Python that validates type hints at compile time. It integrates with the Python ecosystem and runs as a command‑line tool with minimal runtime overhead.

Use cases

Check Python code for type errors before runtime
Enforce type hints across a large codebase
Gradually add static typing to an existing dynamic Python project
Generate machine‑checked documentation from type annotations
Improve code maintainability by catching bugs early

When to choose

You need compile‑time type checking for Python without modifying runtime behavior
Your project already uses type hints or plans to adopt them
You want a fast, well‑maintained tool with strong community support

When to avoid

You require runtime type enforcement or dynamic type checking
You are working in a language other than Python
You need a full IDE integration rather than a command‑line tool

Facets

cli-tool · maturity active

testing developer-tools programming-languages python cross-platform cli static-typing type-checker type-hints mypy linting

3 sources

readme: https://github.com/python/mypy · fetched 2026-10-17 · 0d5c9e213cee
homepage: https://www.mypy-lang.org/ · fetched 2026-10-05 · 96af4a97db7b
site_page: https://www.mypy-lang.org/about.html · fetched 2026-10-05 · 2e1e26112087

Member repositories

Repository	Role	Health v2
python/mypy	main	77

For agents

markdown · JSON · MCP: product_card(name="python/mypy")

Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem