astral-sh/ty 0.0.1-alpha.34

on GitHub

Release Notes

Released on 2025-12-12.

Bug fixes

• Improve solving of a type variable with an upper bound when that type variable appears as one element in a union type (#21893)
• Accurately emulate runtime semantics for kw_only=True dataclasses such that only fields declared in the immediate class body are understood as being keyword-only (#21820)
• Avoid inferring types for invalid binary expressions in string annotations (#21911)
• Fix logic used to determine whether two @final instance types are disjoint (#21769)
• Fix logic used to determine whether two @final type[] types are disjoint (#21770)
• Fix false-positive diagnostics that could arise when analysing cyclic types (#21910), (#21909)

LSP server

• Fix outdated version in publish diagnostics after didChange (#21943)
• Fix workspace symbols to return members too (#21926)
• Adjust scope completions to use all reachable symbols (#21872)
• Classify cls as class parameter for semantic highlighting (#21944)
• Don't show on-hover tooltips for expressions with no inferred type (#21924)
• Ignore __all__ for document and workspace symbol requests (#21928)
• Recognize __all__ += submodule.__all__ in auto-import (#21918)
• Stabilize rename (#21940)

Other changes

• Support checking files without extensions (#21867)
• Improve performance and semantics by deferring inference of all parameter and return-type annotations (#21906)
• Improve resolution of absolute imports in tests (#21817)
• Infer the implicit type of the cls parameter in @classmethod method bodies (#21685)
• Support the implicit type of the cls parameter in signatures of @classmethod methods (#21771)
• Uniformly use "not supported" in diagnostics (#21916)
• Implement the equivalence relation for TypedDicts (#21784)
• Ensure that the type of the class object C is always considered assignable to type[C[Unknown]] if C is a generic class (#21883)
• Improve bad specialization results and error messages (#21840)
• Support NewTypes of float and complex (#21886)

Contributors

• @charliermarsh
• @oconnor663
• @MichaReiser
• @BurntSushi
• @lucach
• @ibraheemdev
• @mtshiba
• @dcreager
• @sharkdp
• @carljm
• @Gankra

Install ty 0.0.1-alpha.34

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/astral-sh/ty/releases/download/0.0.1-alpha.34/ty-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://github.com/astral-sh/ty/releases/download/0.0.1-alpha.34/ty-installer.ps1 | iex"

Download ty 0.0.1-alpha.34