ty 0.0.38

on Python PyPI

Release Notes

Released on 2026-05-19.

Bug fixes

• Fix panic in enum literal during cycle recovery (#25237)
• Fix panic from lazy NewType base expansion during cycle recovery (#25234)
• Fix class-body global lookup before class binding (#25224)
• Handle aliased dict fallbacks in TypedDict unions (#25241)
• Ignore _generate_next_value_ with custom construction hooks (#25210)

LSP server

• Fix find references for except handlers (#25231)
• Preserve delimiters when folding expressions (#24999)
• Use incremental file walk on .gitignore changes (#25183)

Core type checking

• Add first-class support for enum complements (#24961)
• Allow known non-field writes on frozen dataclass subclasses (#25087)
• Ignore generic specialization in layout compatibility checks (#25178)
• Preserve short-circuit bindings in all condition consumers (#25160)
• Support class decorators (#25091)
• Support custom _generate_next_value_ methods in enums (#25196)

Contributors

• @MatthewMckee4
• @MichaReiser
• @charliermarsh
• @lerebear
• @thejchap

Install ty 0.0.38

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.38/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.38/ty-installer.ps1 | iex"

Download ty 0.0.38

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>