ty 0.0.47

on Python PyPI

Release Notes

Released on 2026-06-10.

Bug fixes

• Avoid panicking on encountering a recursive NamedTuple that references a recursive NewType (#25764)
• Fix out-of-bound panic in notebooks involving suppression comments (#25629)

Core type checking

• Preserve overloads through callable protocol decorators (#25806)
• Sync vendored typeshed stubs (#25779). Typeshed diff

Performance and memory-usage improvements

• Avoid caching specialization-invariant known instances (#25816)
• Avoid resolving overload sets for ordinary functions (#25817)
• Store common definition inference results inline (#25814)
• Use Box<SystemPath> etc. in Files (#25554)

Contributors

• @dhruvmanila
• @MichaReiser
• @charliermarsh

Install ty 0.0.47

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ty/releases/download/0.0.47/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ty/releases/download/0.0.47/ty-installer.ps1 | iex"

Download ty 0.0.47

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>