Rare find

Mypy. Catch type mistakes in Python code before they cause problems.

mypy-lang.org

@python

Problem

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.

Audience

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.

Market

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.

Pricing

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.

Vaya's read on this project

Problem, audience, market, and the verdict — sign in to see it.

Updates

July 2026

Special case Task Groups and their special functions (#21766) Jul 25
Use mypy team instead of PSRT (#21772) Jul 25
Add SECURITY.md (#21771) Jul 24
[mypyc] Record MRO ancestor modules as deps of subclass-defining modu… Jul 21
Sync typeshed (#21738) Jul 18
[mypyc] Clear coroutine env on coroutine completion (#21734) Jul 17
Fix another variance issue with `__replace__` (#21737) Jul 16
[mypyc] Fix memory leak in `Exception` subclasses with instance attri… Jul 15
Changelog entry for macOS x86 wheels (#21715) Jul 13
Update changelog for 2.3 release (#21728) Jul 13
Bump version to 2.4.0+dev (#21727) Jul 13
[mypyc] Update documentation of race conditions under free threading … Jul 13
Fix note about python version support for PEP 696 syntax (#21720) Jul 10
[mypyc] Make attribute access memory safe on free-threaded builds (#2… Jul 10
Use `PYODIDE` environment variable for Emscripten cross-compilation d… Jul 10
[mypyc] Borrow final attributes more aggressively (#21702) Jul 9
[mypyc] Improve documentation of Final (#21713) Jul 9
[mypyc] Update free threading Python compatibility docs (#21711) Jul 9
Narrow for frozendict membership check (#21709) Jul 9
Sync typeshed (#21707) Jul 9
Fix custom equality handling for membership narrowing in static conta… Jul 8
Infer Coroutine for unannotated async defs (#21651) Jul 8
Bump librt to 0.13.0 (#21698) Jul 8
[mypyc] Document librt.threading (#21697) Jul 8
[mypyc] Document recent additions to `librt.strings`, such as `ispace… Jul 8
Fix variance inference issues caused by dataclass replace (#21694) Jul 7
Fix regression in dataclass narrowing for Python >= 3.13 (#21675) Jul 7
[Chore] Update changelog for 2.2 (#21691) Jul 7
[mypyc] Add librt.threading.Lock class (#21690) Jul 7
[mypyc] Fix unsafe borrowing of instance attributes with free-threadi… Jul 7