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ty

An extremely fast Python type checker and language server, written in Rust.

astral-sh/ty·

19k315PythonMIT

·Website

Last updated 21 days ago

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0.0.15 - ty Release Notes | AnnounceHQ

Add a diagnostic detecting if a variable is declared as Final but never has any bindings (#23001)
Add a diagnostic detecting overridden comparison dunder methods on order=True dataclasses (#22689)
Add a hint to invalid-argument-type and invalid-assignment diagnostics if a variable is annotated with a type from the numbers module (#22931, #22938)
Add diagnostic hint on unresolved-reference to suggest using "list" instead of "List" (#22827)
Add new diagnostic for invalid dataclass field orders (#19825)
Allow a subclass method with a positional-only parameter to override a superclass method without that parameter if the parameter in the subclass method has a default value (#23037)
Allow self-referential imports outside the global scope (#22963)
Ban ... in odd places inside tuple specializations (#22889)
Ban Required, NotRequired and ReadOnly in parameter annotations (#22888)
Ban legacy TypeVar bounds or constraints from containing type variables (#22949)
Ban multiple unpacked variadic tuples in a tuple specialization (#22884)
Detect generic Callables in the return type of function signatures (#22954)
Detect invalid isinstance() and issubclass() calls against TypedDict classes (#22887)
Detect invalid issubclass() calls against Protocol classes with non-method members (#22896)
Detect invalid attempts to subclass Protocol[] and Generic[] simultaneously (#22948)
Emit a diagnostic on incorrect applications of the legacy convention for specifying positional-only parameters (#22943)
Emit an error if a TypeVarTuple is used to subscript Generic or Protocol without being unpacked (#22952)
Fallback to metaclass __getattr__ or __getattribute__ when looking up attributes on class objects (#22985)
Fix a bug where an overridden type in a dataclass subclass would not be respected if the dataclass subclass field had a default value but the superclass field did not (#22965)
Improve bidirectional type inference involving PEP-695 type aliases (#22989)
Improve detection of invalid NewTypes with generic bases (#22961)
Improve reachability analysis when evaluating the truthiness of expressions that involve variables that may not be bound in all code paths (#22971)
Improve the error message if ** is used with a non-mapping in the context of a call to an overloaded function (#22921)
Infer ParamSpec from class constructors for callable protocols (#22853)
Move the location of some invalid-overload diagnostics (#22933)
Point to an overload with an invalid @final decorator when emitting invalid-overload errors for invalid @final decorators (#22893)
Avoid false positives when iterating over an instance of an intersection with only negated elements by preserving "pure negation" types in descriptor lookups (#22907)
Promote Literal types when inferring elements for very large unannotated tuples, for improved performance (#22841)
Recognize functions with stub bodies in Protocol classes as implicitly abstract (#22838)
Reduce false positives involving heterogeneous dicts by tracking dictionary literal keys as individual places (#22882)
Reduce false positives when subscripting classes generic over TypeVarTuples (#22950)
Remove special handling for Any() in match class patterns (#23011)
Support type[None] in type expressions (#22892)
Support legacy namespace packages declared using pkg_resources.declare_namespace (#22987)
Sync vendored typeshed stubs (#23006), Typeshed diff
Validate signatures of dataclass __post_init__ methods (#22730)

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/astral-sh/ty/releases/download/0.0.15/ty-installer.sh | sh

powershell -ExecutionPolicy Bypass -c "irm https://github.com/astral-sh/ty/releases/download/0.0.15/ty-installer.ps1 | iex"

ty

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