ty 0.0.31

on Python PyPI

Release Notes

Released on 2026-04-15.

Bug fixes

• Avoid panic from double inference for namedtuple(typename=T, field_names=x, **{}) (#24641)
• Avoid panic from double inference with missing functional Enum(...) names (#24638)
• Avoid panic from double inference with functional Enum(value=...) (#24639)
• Fix cases where invalid-key fix doesn't converge, and override-of-final-method produces invalid syntax (#24649)
• Fix unnecessary ty:ignore comments inserted by --add-ignore for diagnostics starting on the same line (#24651)

CLI

• Add --fix mode to enable auto-fix for diagnostics (#24097)

Performance

• Avoid excessive memory usage for dataclasses with many fields (#24620)

Core type checking

• Check inherited NamedTuple field conflicts (#24542)
• Error when duplicate keywords are provided to TypedDict constructors (#24449)
• Respect mixed positional and keyword arguments in TypedDict constructor (#24448)
• Respect subclass shadowing for inherited NamedTuple fields (#24640)
• Skip EnumMeta.__call__ for enum constructor signatures (#24513)

Contributors

• @sharkdp
• @Glyphack
• @MichaReiser
• @charliermarsh

Install ty 0.0.31

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.31/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.31/ty-installer.ps1 | iex"

Download ty 0.0.31

Verifying GitHub Artifact Attestations

The artifacts in this release have attestations generated with GitHub Artifact Attestations. These can be verified by using the GitHub CLI:

gh attestation verify <file-path of downloaded artifact> --repo astral-sh/ty

You can also download the attestation from GitHub and verify against that directly:

gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation>