List view

Do not expand PEP-613 type aliases on hover

serverRelated to the LSP serverRelated to the LSP server

type aliases

Status: Open.

#1883 In astral-sh/ty;

· hamdanal opened on Dec 14, 2025

Support ty as an external type provider in PyCharm

editor

serverRelated to the LSP serverRelated to the LSP server

Status: Open.

Milestone

#2561 In astral-sh/ty;

· KotlinIsland opened on Jan 19, 2026

panic: AST indices should never change within the same revision with missing-override-decorator and Callable

bugSomething isn't workingSomething isn't working

fatala fatal error (panic or crash)a fatal error (panic or crash)

Status: Open.

#3664 In astral-sh/ty;

· correctmost opened on Jun 4, 2026

Better diagnostic to help users annotate async generator in stub

asyncIssues related to checking code using async/awaitIssues related to checking code using async/await

diagnosticsRelated to reporting of diagnostics.Related to reporting of diagnostics.

documentationImprovements or additions to documentationImprovements or additions to documentation

Status: Open.

#2875 In astral-sh/ty;

· niksabaldun opened on Feb 21, 2026

typevar solver can't solve a generic union

genericsBugs or features relating to ty's generics implementationBugs or features relating to ty's generics implementation

Status: Open.

#1703 In astral-sh/ty;

· suleymanozkeskin opened on Dec 1, 2025

Typing guide, migration guide, and other documentation

documentationImprovements or additions to documentationImprovements or additions to documentation

Status: Open.

Task

#149 In astral-sh/ty;

· carljm opened on Mar 26, 2025

walrus expressions in a comprehension scope "leak" into the comprehension's enclosing scope

bugSomething isn't workingSomething isn't working

runtime semanticsAccurate modeling of how Python's semantics work at runtimeAccurate modeling of how Python's semantics work at runtime

Status: Open.

#162 In astral-sh/ty;

· AlexWaygood opened on Mar 24, 2025

invalid-return-type false positive on constrained generic when narrowing for each constraint

genericsBugs or features relating to ty's generics implementationBugs or features relating to ty's generics implementation

narrowingrelated to flow-sensitive type narrowingrelated to flow-sensitive type narrowing

Status: Open.

#621 In astral-sh/ty;

· DetachHead opened on Jun 10, 2025

Advanced pattern matching support

control flow

narrowingrelated to flow-sensitive type narrowingrelated to flow-sensitive type narrowing

Status: Open.

#887 In astral-sh/ty;

· sharkdp opened on Jul 25, 2025

"Missing self argument" error after dynamically replacing method

attribute accessInstance attributes, class attributes, etc.Instance attributes, class attributes, etc.

bugSomething isn't workingSomething isn't working

callsIssues relating to call-signature checking and diagnosticsIssues relating to call-signature checking and diagnostics

Status: Open.

#350 In astral-sh/ty;

· shiw-yang opened on May 13, 2025

Type checker fails to recognize a module as a valid implementation of a Protocol

conformance

Protocols

Status: Open.

#931 In astral-sh/ty;

· wvlab opened on Aug 3, 2025

Support type[SomeProtocol]

conformance

Protocols

type propertiessubtyping, assignability, equivalence, and moresubtyping, assignability, equivalence, and more

Status: Open.

#903 In astral-sh/ty;

· tpgillam opened on Jul 27, 2025

Properly support @property members on protocols

conformance

Protocols

Status: Open.

#1379 In astral-sh/ty;

· AlexWaygood opened on Oct 17, 2025

Support ClassVar protocol members

conformance

Protocols

Status: Open.

#1380 In astral-sh/ty;

· AlexWaygood opened on Oct 17, 2025

Support @staticmethod protocol members and @classmethod protocol members

Protocols

Status: Open.

#1381 In astral-sh/ty;

· AlexWaygood opened on Oct 17, 2025

support TypeVarTuple

conformance

typing semanticstyping-module features, spec compliance, etctyping-module features, spec compliance, etc

Status: Open.

#156 In astral-sh/ty;

· carljm opened on Mar 26, 2025

Return type inference

Status: Open.

Feature

#128 In astral-sh/ty;

· sharkdp opened on Apr 11, 2025

Document public parts of ty_extensions API

documentationImprovements or additions to documentationImprovements or additions to documentation

needs-designNeeds further design before implementationNeeds further design before implementation

Status: Open.

Task

#223 In astral-sh/ty;

· sharkdp opened on Jan 8, 2025

TypeVar with constraints incorrectly solved when Unknown argument is passed in

bugSomething isn't workingSomething isn't working

genericsBugs or features relating to ty's generics implementationBugs or features relating to ty's generics implementation

Status: Open.

#1100 In astral-sh/ty;

· AlexWaygood opened on Aug 27, 2025

Document support for PYTHONPATH

documentationImprovements or additions to documentationImprovements or additions to documentation

help wantedContributions especially welcomeContributions especially welcome

Status: Open.

#1219 In astral-sh/ty;

· MichaReiser opened on Sep 20, 2025

Remove ty support for Python 3.7 (and 3.8?)

Status: Open.

Task

#878 In astral-sh/ty;

· MatthewMckee4 opened on Jul 23, 2025

invalid-return-type false positive on constrained generic

genericsBugs or features relating to ty's generics implementationBugs or features relating to ty's generics implementation

Status: Open.

#688 In astral-sh/ty;

· gusutabopb opened on Jun 21, 2025

Rename file refactor

serverRelated to the LSP serverRelated to the LSP server

Status: Open.

Feature

#1560 In astral-sh/ty;

· MichaReiser opened on Nov 14, 2025

Add context sensitive keyword completions for in and as in some cases

completionsBugs or features relating to autocomplete suggestionsBugs or features relating to autocomplete suggestions

serverRelated to the LSP serverRelated to the LSP server

Status: Open.

Feature

#1568 In astral-sh/ty;

· BurntSushi opened on Nov 14, 2025

Go-to definition in hover

serverRelated to the LSP serverRelated to the LSP server

Status: Open.

Feature

#1575 In astral-sh/ty;

· MichaReiser opened on Nov 17, 2025