astral-sh/ty 0.0.1-alpha.12

on GitHub

Release Notes

Bug fixes

• Avoid duplicate diagnostic when reporting errors in unpacked assignments (#18897)
• Fix panics when "pulling types" for ClassVar or Final parameterized with >1 argument (#18824). These could cause issues when hovering over symbols in an IDE.

Improved modeling of Python runtime semantics

• Add support for @staticmethods (#18809)
• Discover implicit class attribute assignments in @classmethod-decorated methods. Recognize that assignments in the body of a @staticmethod-decorated method are never instance attributes (#18587)
• Report when a dataclass contains more than one KW_ONLY field (#18731)

Type narrowing improvements

• Ty will now perform isinstance() and issubclass() narrowing when the second argument is a union type, intersection type or TypeVar type (#18900)
• Ty now narrows types in comprehensions and generator expressions (#18934)
• Understand two NominalInstanceTypes as disjoint types if attempting to use multiple inheritance with their underlying classes would result in an instance memory layout conflict (#18864)

Other typing semantics features

• Support "mixed" tuples such as tuple[int, *tuple[str, ...]] (#18600, #18901)
• Support type inference for subscript expressions on union types (#18846)
• Introduce a new subtyping framework in which gradual types can participate, allowing for more advanced union type simplification (#18799)
• Surface the matched overload directly when reporting a diagnostic for an invalid call to an overloaded function (#18452)

Improvements to server autocompletions

• Add completions for from module import <CURSOR> (#18830)
• Enforce sort order of completions (#18917)
• Include imported sub-modules as attributes on modules for completions (#18898)

Configuration

• Anchor all src.exclude patterns, for consistency with src.include patterns (#18685)
• Change environment.root to accept multiple paths (#18913)
• Rename src.root setting to environment.root (#18760)
• Support --python=<symlink to executable> (#18827)

Contributors

• @BurntSushi
• @InSyncWithFoo
• @suneettipirneni
• @AlexWaygood
• @dhruvmanila
• @sharkdp
• @MichaReiser
• @med1844
• @dcreager
• @carljm

Install ty 0.0.1-alpha.12

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/astral-sh/ty/releases/download/0.0.1-alpha.12/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.12/ty-installer.ps1 | iex"

Download ty 0.0.1-alpha.12