34 Pull requests merged by 10 people

• [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

• Improve the support for promotions inside unions.

  #19245 merged Jul 7, 2025

• [mypyc] Use per-type free "lists" for nested functions

  #19390 merged Jul 7, 2025

• [mypyc] Call generator helper method directly in await expression

  #19376 merged Jul 7, 2025

• [mypyc] Generate introspection signatures for compiled functions

  #19307 merged Jul 7, 2025

• [mypyc] Add support for C string literals in the IR

  #19383 merged Jul 7, 2025

• [mypyc] Fix error value check for GetAttr that allows nullable values

  #19378 merged Jul 7, 2025

• Check property decorators stricter

  #19313 merged Jul 7, 2025

• Remove all nested imports from default plugin

  #19388 merged Jul 7, 2025

• Combine the revealed types of multiple iteration steps in a more robust manner.

  #19324 merged Jul 7, 2025

• Speed up the default plugin

  #19385 merged Jul 7, 2025

• Lessen dmypy suggest path limitations for Windows machines

  #19337 merged Jul 7, 2025

• Subtype checking micro-optimization

  #19384 merged Jul 6, 2025

9 Pull requests opened by 5 people

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

  #19386 opened Jul 6, 2025

• [pre-commit.ci] pre-commit autoupdate

  #19393 opened Jul 7, 2025

• 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

• (WIP) Update changelog for 1.17 release

  #19427 opened Jul 11, 2025

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

  #19428 opened Jul 11, 2025

16 Issues closed by 7 people

• 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

• False positive `unreachable` when variable is set and reset inside loop

  #14987 closed Jul 7, 2025

• False negative on `setter` field of undefined variable

  #19312 closed Jul 7, 2025

• Mypy daemon suggest does not accept windows paths

  #19335 closed Jul 7, 2025

• [mypyc] AssertionError in get_seuqnce_type on `ois.uname`

  #12141 closed Jul 6, 2025

• (🐞) `unused-ignore` doesn't activate on disabled error codes

  #16537 closed Jul 6, 2025

• bound type-var error is undetected inside return statement

  #16621 closed Jul 6, 2025

11 Issues opened by 10 people

• 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

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

  #19413 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

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

  #19392 opened Jul 7, 2025

• Packaging: license declaration uses outdated format to-be removed Feb. 18, 2026

  #19389 opened Jul 7, 2025

30 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.

• Add support for Pydantic models in `stubgen`

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

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

  #19374 commented on Jul 11, 2025 • 1 new comment

• Try to fix problems caused by in-place modification of typevar defaults

  #19382 commented on Jul 6, 2025 • 0 new comments

• [mypyc] Implement `str.lower()` and `str.upper()` primitive

  #19375 commented on Jul 7, 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

• Adds positional and kwarg only symbols into generated stubs

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

• feat: new mypyc primitive for weakref.ref

  #19099 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

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

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

• More detailed checking of type objects in stubtest

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

• [question] How do I ask a question?

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

• Should `*args` narrow in type guards?

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

• Type narrowing in while loop

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

• 1.17 Release Planning

  #19306 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

• mypy website

  #16553 commented on Jul 11, 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

• Daemon support for --follow-imports=silent

  #9475 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

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

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

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

  #14764 commented on Jul 10, 2025 • 0 new comments

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

  #19098 commented on Jul 9, 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

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

  #4773 commented on Jul 8, 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

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

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

• Infer `python_version` from `project.requires-python` when using pyproject.toml

  #19349 commented on Jul 7, 2025 • 0 new comments

• stubtest nit: arguments vs. parameters

  #16508 commented on Jul 7, 2025 • 0 new comments

• ‘CPyModule__ctypes’ undeclared

  #16687 commented on Jul 6, 2025 • 0 new comments

• overload, Protocol and generic self: annotations

  #19381 commented on Jul 6, 2025 • 0 new comments