Issues

• Error messages mangle string literals that contain $&, $$ or $

  microsoft/pyright#12006 · Filter by author dsfaccini opened on Nov 11, 2026

• Improve string-literal narrowing for membership checks against StrEnum members

  enhancement request
  Feature

  microsoft/pyright#12003 · Filter by author rchiodo opened on Nov 10, 2026

• pythonPlatform: "All" uses union semantics, so platform-specific APIs are accepted unconditionally

  microsoft/pyright#12001 · Filter by author trim21 opened on Nov 10, 2026
  1

• No type narrowing for unioned sentinel

  enhancement request
  microsoft/pyright#11995 · Filter by author Viicos opened on Nov 9, 2026

• Generic dict subclass constructed with keyword arguments has an Unknown key type

  microsoft/pyright#11990 · Filter by author crypt0lith opened on Nov 8, 2026

• Inherited self-annotated __init__ overload does not solve a generic subclass's type parameters

  bug
  microsoft/pyright#11989 · Filter by author UnknownPlatypus opened on Nov 7, 2026
  7

• Class with @dataclass_transform is assumed to be frozen when inheriting from other class with @dataclass_transform

  bug
  microsoft/pyright#11988 · Filter by author 4te2 opened on Nov 7, 2026
  1

• maximum call stack size exceeded when accessing a descriptor whose __get__ is decorated by a function defined in the class body

  bug
  microsoft/pyright#11984 · Filter by author DerekLaymn opened on Nov 6, 2026

• Treat Final constants initialized from static platform/version checks as static conditions

  microsoft/pyright#11980 · Filter by author trim21 opened on Nov 6, 2026

• Exponential type checking with nested dataclasses

  bug
  microsoft/pyright#11972 · Filter by author tedinski opened on Nov 4, 2026

• Supporting Descriptors that override Implicit Receiver Parameter Type

  enhancement request
  microsoft/pyright#11969 · Filter by author icb08 opened on Nov 3, 2026
  2

• Generic (new-style) type alias has wrong namespace

  bug
  microsoft/pyright#11962 · Filter by author tmke8 opened on Nov 2, 2026

• Crash (RangeError: Maximum call stack size exceeded) when a constructor method is annotated with its own class and the class is instantiated

  bug
  microsoft/pyright#11961 · Filter by author Choco-princess opened on Nov 2, 2026

• Support sentinels with dynamic names

  enhancement request
  microsoft/pyright#11956 · Filter by author Abkwreu opened on Nov 1, 2026
  1

• Pyright supports type-typed and Any-typed variables as class bases but not Any | type-typed variables in some contexts

  bug
  microsoft/pyright#11955 · Filter by author willy-b opened on Oct 31, 2026

• The type inferred from an argument type[T] is not applied to return type T

  bug
  microsoft/pyright#11946 · Filter by author adusamr opened on Oct 29, 2026
  1

• reportUninitializedInstanceVariable reports the KW_ONLY pseudo-field of an abstract dataclass base in a @final subclass

  microsoft/pyright#11938 · Filter by author alex-raw opened on Oct 26, 2026
  1

• Regression: false negative of reportArgumentType in decorated functions

  bug
  microsoft/pyright#11937 · Filter by author pinterior opened on Oct 26, 2026
  2

• Reversed sys.version_info comparison (tuple on the left) is not evaluated as a static condition.

  bug
  microsoft/pyright#11927 · Filter by author hunterhogan opened on Oct 25, 2026

• Workspace diagnostic mode never finishes ("1 file to analyze") when targeting Python 3.14 because string/templatelib.pyi is counted

  addressed in next versionbug
  microsoft/pyright#11925 · Filter by author Kiyahj81 opened on Oct 24, 2026
  1

• Bogus errors when mixing Concatenate with overloaded functions.

  bug
  microsoft/pyright#11922 · Filter by author TheDreadedAndy opened on Oct 23, 2026
  1

• Field types in the functional form of NamedTuple are not validated as type expressions

  bug
  microsoft/pyright#11920 · Filter by author seunghyun-24 opened on Oct 23, 2026
  1

• Diagnostics dropped after a for loop with assert k in d, k (incomplete type stuck in code flow cache, regression in 1.1.364)

  microsoft/pyright#11919 · Filter by author ZmeiGorynych opened on Oct 23, 2026

• --verifytypes should allow setting an attribute based on a fully defined function

  bug
  microsoft/pyright#11917 · Filter by author A5rocks opened on Oct 23, 2026
  1

• reportUnusedExcept produces false positives due to default arguments

  bug
  microsoft/pyright#11899 · Filter by author interrupt-routine opened on Oct 20, 2026