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Accepting request 1159070 from home:dancermak:branches:devel:languages:python
new upstream release 1.9.0 OBS-URL: https://build.opensuse.org/request/show/1159070 OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-mypy?expand=0&rev=8
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-------------------------------------------------------------------
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Mon Mar 18 14:33:02 UTC 2024 - Dan Čermák <dcermak@suse.com>
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New upstream release 1.9.0
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#### Breaking Changes
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Because the version of typeshed we use in mypy 1.9 doesn't support 3.7, neither does mypy 1.9. (Jared Hance, PR [16883](https://github.com/python/mypy/pull/16883))
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We are planning to enable
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[local partial types](https://mypy.readthedocs.io/en/stable/command_line.html#cmdoption-mypy-local-partial-types) (enabled via the
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`--local-partial-types` flag) later this year by default. This change
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was announced years ago, but now it's finally happening. This is a
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major backward-incompatible change, so we'll probably include it as
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part of the upcoming mypy 2.0 release. This makes daemon and
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non-daemon mypy runs have the same behavior by default.
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Local partial types can also be enabled in the mypy config file:
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```
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local_partial_types = True
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```
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We are looking at providing a tool to make it easier to migrate
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projects to use `--local-partial-types`, but it's not yet clear whether
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this is practical. The migration usually involves adding some
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explicit type annotations to module-level and class-level variables.
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#### Basic Support for Type Parameter Defaults (PEP 696)
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This release contains new experimental support for type parameter
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defaults ([PEP 696](https://peps.python.org/pep-0696)). Please try it
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out! This feature was contributed by Marc Mueller.
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Since this feature will be officially introduced in the next Python
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feature release (3.13), you will need to import `TypeVar`, `ParamSpec`
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or `TypeVarTuple` from `typing_extensions` to use defaults for now.
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This example adapted from the PEP defines a default for `BotT`:
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```python
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from typing import Generic
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from typing_extensions import TypeVar
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class Bot: ...
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BotT = TypeVar("BotT", bound=Bot, default=Bot)
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class Context(Generic[BotT]):
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bot: BotT
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class MyBot(Bot): ...
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# type is Bot (the default)
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reveal_type(Context().bot)
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# type is MyBot
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reveal_type(Context[MyBot]().bot)
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```
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#### Type-checking Improvements
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* Fix missing type store for overloads (Marc Mueller, PR [16803](https://github.com/python/mypy/pull/16803))
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* Fix `'WriteToConn' object has no attribute 'flush'` (Charlie Denton, PR [16801](https://github.com/python/mypy/pull/16801))
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* Improve TypeAlias error messages (Marc Mueller, PR [16831](https://github.com/python/mypy/pull/16831))
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* Support narrowing unions that include `type[None]` (Christoph Tyralla, PR [16315](https://github.com/python/mypy/pull/16315))
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* Support TypedDict functional syntax as class base type (anniel-stripe, PR [16703](https://github.com/python/mypy/pull/16703))
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* Accept multiline quoted annotations (Shantanu, PR [16765](https://github.com/python/mypy/pull/16765))
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* Allow unary + in `Literal` (Jelle Zijlstra, PR [16729](https://github.com/python/mypy/pull/16729))
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* Substitute type variables in return type of static methods (Kouroche Bouchiat, PR [16670](https://github.com/python/mypy/pull/16670))
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* Consider TypeVarTuple to be invariant (Marc Mueller, PR [16759](https://github.com/python/mypy/pull/16759))
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* Add `alias` support to `field()` in `attrs` plugin (Nikita Sobolev, PR [16610](https://github.com/python/mypy/pull/16610))
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* Improve attrs hashability detection (Tin Tvrtković, PR [16556](https://github.com/python/mypy/pull/16556))
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#### Performance Improvements
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* Speed up finding function type variables (Jukka Lehtosalo, PR [16562](https://github.com/python/mypy/pull/16562))
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#### Documentation Updates
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* Document supported values for `--enable-incomplete-feature` in "mypy --help" (Froger David, PR [16661](https://github.com/python/mypy/pull/16661))
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* Update new type system discussion links (thomaswhaley, PR [16841](https://github.com/python/mypy/pull/16841))
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* Add missing class instantiation to cheat sheet (Aleksi Tarvainen, PR [16817](https://github.com/python/mypy/pull/16817))
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* Document how evil `--no-strict-optional` is (Shantanu, PR [16731](https://github.com/python/mypy/pull/16731))
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* Improve mypy daemon documentation note about local partial types (Makonnen Makonnen, PR [16782](https://github.com/python/mypy/pull/16782))
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* Fix numbering error (Stefanie Molin, PR [16838](https://github.com/python/mypy/pull/16838))
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* Various documentation improvements (Shantanu, PR [16836](https://github.com/python/mypy/pull/16836))
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#### Stubtest Improvements
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* Ignore private function/method parameters when they are missing from the stub (private parameter names start with a single underscore and have a default) (PR [16507](https://github.com/python/mypy/pull/16507))
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* Ignore a new protocol dunder (Alex Waygood, PR [16895](https://github.com/python/mypy/pull/16895))
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* Private parameters can be omitted (Sebastian Rittau, PR [16507](https://github.com/python/mypy/pull/16507))
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* Add support for setting enum members to "..." (Jelle Zijlstra, PR [16807](https://github.com/python/mypy/pull/16807))
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* Adjust symbol table logic (Shantanu, PR [16823](https://github.com/python/mypy/pull/16823))
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* Fix posisitional-only handling in overload resolution (Shantanu, PR [16750](https://github.com/python/mypy/pull/16750))
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#### Stubgen Improvements
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* Fix crash on star unpack of TypeVarTuple (Ali Hamdan, PR [16869](https://github.com/python/mypy/pull/16869))
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* Use PEP 604 unions everywhere (Ali Hamdan, PR [16519](https://github.com/python/mypy/pull/16519))
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* Do not ignore property deleter (Ali Hamdan, PR [16781](https://github.com/python/mypy/pull/16781))
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* Support type stub generation for `staticmethod` (WeilerMarcel, PR [14934](https://github.com/python/mypy/pull/14934))
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-------------------------------------------------------------------
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Tue Jan 2 17:24:56 UTC 2024 - Dirk Müller <dmueller@suse.com>
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