25 Pull requests merged by 7 people

• Updates to 1.17 changelog

  #19436 merged Jul 14, 2025

• Initial changelog for 1.17 release

  #19427 merged Jul 14, 2025

• [mypyc] Simplify IR generated for "for" loops over strings

  #19434 merged Jul 14, 2025

• [mypyc] Use native integers for some sequence indexing operations

  #19426 merged Jul 11, 2025

• [mypyc] Remove the unused CPyList_GetItemUnsafe primitive

  #19424 merged Jul 11, 2025

• [mypyc] Add a few native int helper irbuilder methods

  #19423 merged Jul 11, 2025

• Allow adjacent conditionally-defined overloads

  #19042 merged Jul 11, 2025

• [mypyc] Add back test for next with list iterator

  #19419 merged Jul 11, 2025

• [mypyc] Fail run test if default driver does not find test cases

  #19420 merged Jul 11, 2025

• Move is_defined_in_stub to shared checker API to break import cycle

  #19417 merged Jul 10, 2025

• [mypyc] Fix exception swallowing in async try/finally blocks with await

  #19353 merged Jul 10, 2025

• [mypyc] Use PyList_Check for isinstance(obj, list)

  #19416 merged Jul 9, 2025

• Infer empty list without annotation for __slots__ and module __all__

  #19348 merged Jul 9, 2025

• Support _value_ as a fallback for ellipsis Enum members

  #19352 merged Jul 9, 2025

• More shards for mypy-primer

  #19405 merged Jul 9, 2025

• [mypyc] Speed up for loop over native generator

  #19415 merged Jul 9, 2025

• feat: add helpful info to internal AssertionError excs

  #19404 merged Jul 9, 2025

• [mypyc] Report error on reserved method name

  #19407 merged Jul 9, 2025

• [mypyc] Add is_bool_or_bit_rprimitive

  #19406 merged Jul 9, 2025

• [mypyc] Add faster primitive for string equality

  #19402 merged Jul 9, 2025

• [mypyc] Speed up native-to-native calls using await

  #19398 merged Jul 8, 2025

• [mypyc] Add tests for string equality

  #19401 merged Jul 8, 2025

• [mypyc] Raise NameError on undefined names

  #19395 merged Jul 8, 2025

• [mypyc] Simplify comparison of tuple elements

  #19396 merged Jul 8, 2025

• perf: add __slots__ to SubtypeVisitor

  #19394 merged Jul 7, 2025

10 Pull requests opened by 6 people

• Draft: Solve intermediate variable bug

  #19399 opened Jul 8, 2025

• perf: return from `is_subtype` early

  #19400 opened Jul 8, 2025

• perf: try to cache inner contexts of overloads

  #19408 opened Jul 8, 2025

• Remove duplicated constraints before solving and deduplicate `fast_container_type` items

  #19409 opened Jul 8, 2025

• Support attribute access on enum members correctly

  #19422 opened Jul 11, 2025

• Fix "ignored exception in `hasattr`" in dmypy

  #19428 opened Jul 11, 2025

• feat(overloads): Expand finite sum types into a union of possible types

  #19431 opened Jul 13, 2025

• Add functools.lru_cache plugin support Fixes #16261

  #19432 opened Jul 13, 2025

• [mypyc] Add primitives for isinstance of built-in types

  #19435 opened Jul 14, 2025

• [mypyc] Add SetElement op for initializing struct values

  #19437 opened Jul 14, 2025

13 Issues closed by 8 people

• isinstance(..., (..., Any)) causes 'statement is unreachable'

  #10547 closed Jul 14, 2025

• mypy does not type check arguments to `Annotated`

  #19438 closed Jul 14, 2025

• Unsupported operand types for + ("list[None]" and "list[str]")

  #19413 closed Jul 14, 2025

• Match on tuples and possibly-undefined

  #19391 closed Jul 11, 2025

• TYPE_CHECKING overload with implementation just outside flags second usage, but not first

  #19015 closed Jul 11, 2025

• Errors when merging consecutive leading-indented (?) overload statements

  #17521 closed Jul 11, 2025

• False-positive "Non-overlapping equality check" comparing `Enum`s `self` to members

  #17317 closed Jul 11, 2025

• `array` generic changes type in isinstance check

  #19421 closed Jul 10, 2025

• dmypy: error: unrecognized arguments: --config-file pyproject.toml

  #17624 closed Jul 10, 2025

• RuntimeError: Not implemented mypy.types.TypeGuardedType

  #19412 closed Jul 10, 2025

• Mypy complains about empty __all__ being untyped

  #10103 closed Jul 9, 2025

• Mypy complains when `[]` is used for `__slots__` definition

  #10870 closed Jul 9, 2025

• Enum types are incorrectly inferred

  #19334 closed Jul 9, 2025

10 Issues opened by 9 people

• [PEP 695] Incorrect Variance Computation with Polymorphic Constructor.

  #19439 opened Jul 14, 2025

• `func-returns-value` false positive for union type?

  #19433 opened Jul 13, 2025

• Walrus narrowing not propagated from inside expression

  #19430 opened Jul 12, 2025

• Mypy configuration is incomplete

  #19429 opened Jul 12, 2025

• AssertionError raised after #19248

  #19425 opened Jul 11, 2025

• Type of an Enum nonmember is wrong when accessed through a member

  #19418 opened Jul 10, 2025

• `NamedTuple`'s `_tuplegetter` is not recognized

  #19414 opened Jul 9, 2025

• Detect missing or incorrect overload defaults

  #19411 opened Jul 9, 2025

• False-positive [attr-defined] when importing classes and functions from a file with the same name as the parent package

  #19410 opened Jul 9, 2025

• [CI]: `mypy-primer(0)` timeout due to long checking of `colour`

  #19403 opened Jul 8, 2025

39 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• Feature: Clear type info on del for local inferred variables (fixes #10005)

  #19386 commented on Jul 11, 2025 • 4 new comments

• Fix `Enum.value` inference for `Enum`s with `@cache`d methods

  #19374 commented on Jul 14, 2025 • 3 new comments

• Add support for Pydantic models in `stubgen`

  #19095 commented on Jul 8, 2025 • 2 new comments

• 'Subclass of "A" and "B" cannot exist: would have incompatible method signatures' is usually wrong

  #19377 commented on Jul 8, 2025 • 0 new comments

• ParamSpec seems to get lost with partial()

  #18589 commented on Jul 14, 2025 • 0 new comments

• error message: move star prefix to Argument

  #13146 commented on Jul 14, 2025 • 0 new comments

• Fix `[func-returns-value]` not being trigged when calling decorated functions

  #18015 commented on Jul 13, 2025 • 0 new comments

• More detailed checking of type objects in stubtest

  #18251 commented on Jul 9, 2025 • 0 new comments

• stubtest: get better signatures for `__init__` of C classes

  #18259 commented on Jul 9, 2025 • 0 new comments

• stubtest: handle overloads with mixed pos-only params

  #18287 commented on Jul 9, 2025 • 0 new comments

• Introduce temporary named expressions for `match` subjects

  #18446 commented on Jul 14, 2025 • 0 new comments

• Consider property access from class objects (now for real)

  #18969 commented on Jul 14, 2025 • 0 new comments

• feat(mypyc): proper weakref support

  #19056 commented on Jul 14, 2025 • 0 new comments

• feat: new mypyc primitive for weakref.ref

  #19099 commented on Jul 14, 2025 • 0 new comments

• WIP: new mypyc primitive for `weakref.ref.__call__`

  #19145 commented on Jul 14, 2025 • 0 new comments

• Handle `__hash__ = None` in somewhat more intuitive fashion

  #19168 commented on Jul 14, 2025 • 0 new comments

• feat: new mypyc primitives for weakref.proxy

  #19217 commented on Jul 14, 2025 • 0 new comments

• Check slots assignments on self types

  #19332 commented on Jul 14, 2025 • 0 new comments

• Adds positional and kwarg only symbols into generated stubs

  #19340 commented on Jul 13, 2025 • 0 new comments

• Do not display import-related errors after module-level always false assert

  #19347 commented on Jul 12, 2025 • 0 new comments

• erroneous complaint that overloaded function implementation does not accept all possible arguments of signature

  #18596 commented on Jul 8, 2025 • 0 new comments

• Mypy doesn't object to `cached_property` methods that don't exist

  #18327 commented on Jul 8, 2025 • 0 new comments

• Odd error message for invalid use of tuple(): expected "Iterable[Never]"

  #19098 commented on Jul 9, 2025 • 0 new comments

• Add --soft-fail option to capture Mypy output without blocking CI

  #18859 commented on Jul 10, 2025 • 0 new comments

• (🐞) false negative with `dataclass` "non-default argument follows default argument"

  #12137 commented on Jul 10, 2025 • 0 new comments

• Daemon support for --follow-imports=silent

  #9475 commented on Jul 10, 2025 • 0 new comments

• TypeForm[T]: Spelling for regular types (int, str) & special forms (Union[int, str], Literal['foo'], etc)

  #9773 commented on Jul 10, 2025 • 0 new comments

• mypy website

  #16553 commented on Jul 11, 2025 • 0 new comments

• Checking elements of a `list[str | None]` after discarding the possibility of `None`

  #16243 commented on Jul 11, 2025 • 0 new comments

• Erroneous "Self argument missing" error when decorators are used

  #19392 commented on Jul 11, 2025 • 0 new comments

• Type narrowing in while loop

  #14807 commented on Jul 12, 2025 • 0 new comments

• Should `*args` narrow in type guards?

  #14273 commented on Jul 12, 2025 • 0 new comments

• [question] How do I ask a question?

  #12426 commented on Jul 12, 2025 • 0 new comments

• (🐞) `overload`s that exhaust finite `Literal`s(`bool`/`Enum`) not treated as exhaustive

  #14764 commented on Jul 13, 2025 • 0 new comments

• Inconsistency for `[func-returns-value]`: Error not reported for `staticmethod`s

  #14179 commented on Jul 13, 2025 • 0 new comments

• Add "<function> defined here" notes to more errors

  #4773 commented on Jul 14, 2025 • 0 new comments

• Incompatible types when calling generinc `__init__` from generic `@classmethod`

  #17937 commented on Jul 14, 2025 • 0 new comments

• 1.17 Release Planning

  #19306 commented on Jul 14, 2025 • 0 new comments

• ABCMeta.register support

  #2922 commented on Jul 14, 2025 • 0 new comments