8 Pull requests merged by 3 people

• Cache type_object_type()

  #19514 merged Jul 27, 2025

• Fix #19507 Prevent final reassignment in match case

  #19496 merged Jul 27, 2025

• Avoid duplicate visit in check_boolean_op()

  #19515 merged Jul 26, 2025

• docs: update cython and setuptools RTD URLs

  #19512 merged Jul 26, 2025

• Optimize generic inference passes

  #19501 merged Jul 25, 2025

• Use normalized tuples for fallback calculation

  #19111 merged Jul 22, 2025

• Fix decorated methods with self-types in protocols

  #19484 merged Jul 21, 2025

• Retain None as constraints bottom if no bottoms were provided

  #19485 merged Jul 21, 2025

13 Pull requests opened by 6 people

• feat: `__repr__` method for RefExpr and NameExpr

  #19486 opened Jul 21, 2025

• When selecting an overload item for constraint template matching, treat any ParamSpec in the template as free

  #19487 opened Jul 21, 2025

• Move self argument checks to a later phase - after decorator application, if any

  #19490 opened Jul 23, 2025

• Fix #19491, crash when using enable_error_code value of wrong type in pyproject.toml

  #19494 opened Jul 24, 2025

• [mypyc] feat: unwrap NewType types to their base types for optimized code paths

  #19497 opened Jul 24, 2025

• [mypyc] feat: true_dict_rprimitive for optimized dict fastpath usage

  #19499 opened Jul 24, 2025

• [mypyc] feat: cache len for iterating over immutable types

  #19503 opened Jul 25, 2025

• Try simple-minded call expression cache

  #19505 opened Jul 25, 2025

• Enable pretty by default

  #19510 opened Jul 25, 2025

• feat(test): mypyc tests for container creation from `range`

  #19511 opened Jul 25, 2025

• feat: index-range err code

  #19513 opened Jul 26, 2025

• [match-case] Fix narrowing of class pattern with union-argument.

  #19517 opened Jul 27, 2025

• [mypyc] feat: unroll certain for loops with known params

  #19518 opened Jul 28, 2025

11 Issues closed by 5 people

• Assignment to final variables is allowed in a match statement

  #19507 closed Jul 27, 2025

• Bogus warning with `ItemsView`

  #19495 closed Jul 27, 2025

• MyPy 1.11.0 loop variable persistance

  #17541 closed Jul 26, 2025

• Tight type scoping for loop local variables

  #19504 closed Jul 26, 2025

• Check format strings in logger calls

  #19508 closed Jul 26, 2025

• Kwargs after ParamSpec.args should be tolerated

  #19506 closed Jul 25, 2025

• Add `--warn-unreachable` to strict mode

  #11223 closed Jul 24, 2025

• `class S(tuple[*tuple[()]])` crashes mypy

  #19105 closed Jul 22, 2025

• The "dummy" variable _ is type-checked in assignments

  #19488 closed Jul 22, 2025

• False Positives in Protocol Assignability Check Where `Self` Is a Parameter of a Decorated Method (1.17.0)

  #19482 closed Jul 21, 2025

• 1.17.0 regression: dict literals incompatible with Sequence[TypedDict]

  #19483 closed Jul 21, 2025

8 Issues opened by 8 people

• Condition can't be inferred, unable to merge overloads

  #19516 opened Jul 27, 2025

• Stubtest thinks a property alias isn't read-only in stubs

  #19509 opened Jul 25, 2025

• Importing IPython confuses mypy about package '__main__.py'

  #19500 opened Jul 24, 2025

• [docs] Update Code Conventions to reflect the switch from flake8 to ruff

  #19498 opened Jul 24, 2025

• Inconsistent assignability of callable with optional keywords to positional-only callback

  #19493 opened Jul 23, 2025

• Regression: dict | None or dict fallback breaks type inference for nested dicts after PR #19249

  #19492 opened Jul 23, 2025

• Crash when using an invalid 'enable_error_code' value in pyproject.toml

  #19491 opened Jul 23, 2025

• `--no-incremental` still writes `.mypy_cache`

  #19489 opened Jul 22, 2025

29 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.

• [match-case] Fix narrowing of class pattern with union-argument.

  #19473 commented on Jul 27, 2025 • 5 new comments

• [match-case] fix matching against `typing.Callable` and `Protocol` types.

  #19471 commented on Jul 27, 2025 • 4 new comments

• Add `collections._tuplegetter` support

  #19479 commented on Jul 23, 2025 • 3 new comments

• perf: deduplicate `fast_container_type` and `fast_dict_type` items before joining

  #19409 commented on Jul 27, 2025 • 3 new comments

• feat: new mypyc primitive for weakref.ref

  #19099 commented on Jul 27, 2025 • 1 new comment

• [PEP 695] Fix incorrect Variance Computation with Polymorphic Methods.

  #19466 commented on Jul 27, 2025 • 0 new comments

• [PEP 696] Fix swapping TypeVars with defaults.

  #19449 commented on Jul 27, 2025 • 0 new comments

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

  #19431 commented on Jul 25, 2025 • 0 new comments

• perf: try to cache inner contexts of overloads

  #19408 commented on Jul 23, 2025 • 0 new comments

• Draft: Solve intermediate variable bug

  #19399 commented on Jul 24, 2025 • 0 new comments

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

  #19347 commented on Jul 21, 2025 • 0 new comments

• Check slots assignments on self types

  #19332 commented on Jul 21, 2025 • 0 new comments

• Fix/attrs init overload

  #19104 commented on Jul 25, 2025 • 0 new comments

• Add a flag `--enable-all-error-codes`, which enables all error codes

  #19048 commented on Jul 23, 2025 • 0 new comments

• Narrow literals in the negative case even with custom equality

  #18574 commented on Jul 26, 2025 • 0 new comments

• Introduce temporary named expressions for `match` subjects

  #18446 commented on Jul 21, 2025 • 0 new comments

• [plugins/help] Triggering node visits?

  #19481 commented on Jul 28, 2025 • 0 new comments

• 1.17 Release Planning

  #19306 commented on Jul 27, 2025 • 0 new comments

• Type narrowing broken with dict items

  #18440 commented on Jul 26, 2025 • 0 new comments

• ParamSpec seems to get lost with partial()

  #18589 commented on Jul 26, 2025 • 0 new comments

• Type narrowing on all() call

  #13069 commented on Jul 25, 2025 • 0 new comments

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

  #19377 commented on Jul 24, 2025 • 0 new comments

• (🎁) Flag to make default return type `None` instead of `Any`

  #9413 commented on Jul 24, 2025 • 0 new comments

• Generic subclass of a generic class, using a constrained TypeVar is mishandled

  #17757 commented on Jul 24, 2025 • 0 new comments

• Add a way to ignore `type: ignore`, disabled error codes

  #13201 commented on Jul 23, 2025 • 0 new comments

• Can JSON format output and command line parameter options for -- disable-error-code all be supported?

  #17446 commented on Jul 23, 2025 • 0 new comments

• Enable --warn-unreachable in --strict in Mypy 2.0

  #18078 commented on Jul 23, 2025 • 0 new comments

• Internal error: KeyError 'setter_type' during node deserialization

  #19359 commented on Jul 22, 2025 • 0 new comments

• False positive `comparison-overlap`

  #15509 commented on Jul 21, 2025 • 0 new comments