ty 0.0.23

on Python PyPI

Release Notes

Released on 2026-03-13.

Bug fixes

• Fix false-positive diagnostics for PEP-604 union annotations on attribute targets on Python 3.9 when from __future__ import annotations is active (#23915)
• dataclass_transform: Respect kw_only overwrites in dataclasses (#23930)
• Fix too-many-cycle panics when inferring loop variables with Literal types (#23875)

Server

• Fix folding range classification of lines starting with # (#23831)
• Fix folding ranges for notebooks (#23830)

Core type checking

• Split errors for possibly missing submodules into a new possibly-missing-submodule error code (enabled by default), and make possibly-missing-attribute ignored by default (#23918)
• Improve handling of bidirectional inference when (#23844)
• Fix inference of conditionally defined properties (#23925)

Improvements to diagnostics

• Clarify in diagnostics that from __future__ import annotations only stringifies type annotations (#23928)

Performance improvements

• Avoid duplicated work during multi-inference (#23923)

Contributors

• @ibraheemdev
• @sharkdp
• @oconnor663
• @mtshiba
• @MichaReiser
• @carljm
• @AlexWaygood

Install ty 0.0.23

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.23/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.23/ty-installer.ps1 | iex"

Download ty 0.0.23