ดาวน์โหลด ty 0.0.20

Release Notes
Released on 2026-03-02.
Bug fixes
- Disallow negative narrowing for isinstance() or issubclass() checks involving type[] types (#23598)
- Fix binary operations between an instance of a NewType of float and an instance of Any/Unknown (#23620)
- Fix bug where ty would think that a Callable with a variadic positional parameter could be a subtype of a Callable with a positional-or-keyword parameter (#23610)
- Fix inference of t.__mro__ if t is an instance of type[Any] (#23632)
- Fix overloaded callable assignability for unary Callable targets (#23277)
- Limit recursion depth when displaying self-referential function types (#23647)
- Ensure that python -m ty works even when ty was installed into an ephemeral virtual environment (#2852)
LSP server
- Add support for the LSP protocol's "type hierarchy" feature (#23566)
Type checking
- Add more ParamSpec validation for P.args and P.kwargs (#23640)
- Ban nested Required/NotRequired, and ban them both outside of TypedDict fields (#23627)
- Detect inconsistent generic base class specializations that appear in the same MRO (#23615)
- Detect invalid uses of @final on non-methods (#23604)
- Add partial support and validation for Unpack when used with tuple types (#23651)
- Recurse into tuples and nested tuples when applying special-cased validation of arguments passed to isinstance() and issubclass() (#23607)
- Reject ellipsis literals in odd places in type/annotation expressions (#23611)
- Reject functions with PEP-695 type parameters that shadow type parameters from enclosing scopes (#23619)
- Reject generic metaclasses parameterized by type variables (#23628)
- Treat dataclass_transform dataclasses as neither frozen nor non-frozen (#23366)
- Validate that type variable defaults don't reference later type parameters or type parameters out of scope (#23623)
Typeshed
- Sync vendored typeshed stubs (#23642). Typeshed diff
Contributors
- @Hugo-Polloli
- @zanieb
- @sharkdp
- @mtshiba
- @carljm
- @charliermarsh
- @sinon
- @BurntSushi
- @oconnor663
- @AlexWaygood
- @zsol
Install ty 0.0.20
Install prebuilt binaries via shell script
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/astral-sh/ty/releases/download/0.0.20/ty-installer.sh | sh
Install prebuilt binaries via powershell script
powershell -ExecutionPolicy Bypass -c "irm https://github.com/astral-sh/ty/releases/download/0.0.20/ty-installer.ps1 | iex"
Download ty 0.0.20
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File │Platform │Checksum
─────────────────────────────────────────────┼────────────────────────────┼─────────────
ty-aarch64-apple-darwin.tar.gz │Apple Silicon macOS │checksum
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ty-x86_64-apple-darwin.tar.gz │Intel macOS │checksum
─────────────────────────────────────────────┼────────────────────────────┼─────────────
ty-aarch64-pc-windows-msvc.zip │ARM64 Windows │checksum
─────────────────────────────────────────────┼────────────────────────────┼─────────────
ty-i686-pc-windows-msvc.zip │x86 Windows │checksum
─────────────────────────────────────────────┼────────────────────────────┼─────────────
ty-x86_64-pc-windows-msvc.zip │x64 Windows │checksum
─────────────────────────────────────────────┼────────────────────────────┼─────────────
ty-aarch64-unknown-linux-gnu.tar.gz │ARM64 Linux │checksum
─────────────────────────────────────────────┼────────────────────────────┼─────────────
ty-i686-unknown-linux-gnu.tar.gz │x86 Linux │checksum
─────────────────────────────────────────────┼────────────────────────────┼─────────────
ty-powerpc64-unknown-linux-gnu.tar.gz │PPC64 Linux │checksum
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ty-powerpc64le-unknown-linux-gnu.tar.gz │PPC64LE Linux │checksum
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ty-s390x-unknown-linux-gnu.tar.gz │S390x Linux │checksum
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ty-x86_64-unknown-linux-gnu.tar.gz │x64 Linux │checksum
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ty-armv7-unknown-linux-gnueabihf.tar.gz │ARMv7 Linux │checksum
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ty-aarch64-unknown-linux-musl.tar.gz │ARM64 MUSL Linux │checksum
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ty-i686-unknown-linux-musl.tar.gz │x86 MUSL Linux │checksum
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ty-x86_64-unknown-linux-musl.tar.gz │x64 MUSL Linux │checksum
─────────────────────────────────────────────┼────────────────────────────┼─────────────
ty-arm-unknown-linux-musleabihf.tar.gz │ARMv6 MUSL Linux (Hardfloat)│checksum
─────────────────────────────────────────────┼────────────────────────────┼─────────────
ty-armv7-unknown-linux-musleabihf.tar.gz │ARMv7 MUSL Linux │checksum
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