ty 0.0.72

on Python PyPI

Release Notes

Released on 2026-08-14.

Preview features

• Check PEP 723 scripts in isolation (#27462)

Library support

• Pydantic: Accept documented boolean and fractional inputs (#27754)
• Pydantic: Accept enum members for lax string and integer fields (#27751)

Diagnostics

• Improve assignability hints for protocols and TypedDict types (#27717)

Core type checking

• Avoid treating augmented assignments as attribute definitions (#27633)
• Diagnose invalid module-level __getattr__ calls (#27507)
• Fix overload argument expansion with unpacked positional arguments (#27744)
• Fix specialization of generic TypedDict aliases (#27760)
• Ignore generic declaration metadata in staticness checks (#27692)
• Preserve tuple types containing Never (#27580)
• Report deprecated unary operations (#27584)
• Respect variance when inferring structural and callable types (#27707)
• Support TypeVarTuple in call binding (#26886)
• Treat generator-expression exceptions as eagerly evaluated (#27735)

Performance

• Avoid exponential narrowing of gradual string-literal unions (#27742)

Contributors

• @AlexWaygood
• @Andrej730
• @charliermarsh
• @MichaReiser
• @dhruvmanila
• @carljm

Install ty 0.0.72

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.72/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.72/ty-installer.ps1 | iex"

Download ty 0.0.72

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>