Update dependency attrs to v22

[mend-for-github-com]

This PR contains the following updates:

Package	Type	Update	Change
attrs (source, changelog)	packages	major	==20.1.0 -> ==22.2.0

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Release Notes

python-attrs/attrs

v22.2.0

Compare Source

Backwards-incompatible Changes

• Python 3.5 is not supported anymore.
  #​988

Deprecations

• Python 3.6 is now deprecated and support will be removed in the next release.
  #​1017

Changes

• attrs.field() now supports an alias option for explicit __init__ argument names.

  Get __init__ signatures matching any taste, peculiar or plain!
  The PEP 681 compatible alias option can be use to override private attribute name mangling, or add other arbitrary field argument name overrides.
  #​950

• attrs.NOTHING is now an enum value, making it possible to use with e.g. typing.Literal.
  #​983

• Added missing re-import of attr.AttrsInstance to the attrs namespace.
  #​987

• Fix slight performance regression in classes with custom __setattr__ and speedup even more.
  #​991

• Class-creation performance improvements by switching performance-sensitive templating operations to f-strings.

  You can expect an improvement of about 5% -- even for very simple classes.
  #​995

• attrs.has() is now a TypeGuard for AttrsInstance.
  That means that type checkers know a class is an instance of an attrs class if you check it using attrs.has() (or attr.has()) first.
  #​997

• Made attrs.AttrsInstance stub available at runtime and fixed type errors related to the usage of attrs.AttrsInstance in Pyright.
  #​999

• On Python 3.10 and later, call abc.update_abstractmethods() on dict classes after creation.
  This improves the detection of abstractness.
  #​1001

• attrs's pickling methods now use dicts instead of tuples.
  That is safer and more robust across different versions of a class.
  #​1009

• Added attrs.validators.not_(wrapped_validator) to logically invert wrapped_validator by accepting only values where wrapped_validator rejects the value with a ValueError or TypeError (by default, exception types configurable).
  #​1010

• The type stubs for attrs.cmp_using() now have default values.
  #​1027

• To conform with PEP 681, attr.s() and attrs.define() now accept unsafe_hash in addition to hash.
  #​1065

v22.1.0

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Backwards-incompatible Changes

• Python 2.7 is not supported anymore.

  Dealing with Python 2.7 tooling has become too difficult for a volunteer-run project.

  We have supported Python 2 more than 2 years after it was officially discontinued and feel that we have paid our dues.
  All version up to 21.4.0 from December 2021 remain fully functional, of course.
  #​936

• The deprecated cmp attribute of attrs.Attribute has been removed.
  This does not affect the cmp argument to attr.s that can be used as a shortcut to set eq and order at the same time.
  #​939

Changes

• Instantiation of frozen slotted classes is now faster.
  #​898
• If an eq key is defined, it is also used before hashing the attribute.
  #​909
• Added attrs.validators.min_len().
  #​916
• attrs.validators.deep_iterable()'s member_validator argument now also accepts a list of validators and wraps them in an attrs.validators.and_().
  #​925
• Added missing type stub re-imports for attrs.converters and attrs.filters.
  #​931
• Added missing stub for attr(s).cmp_using().
  #​949
• attrs.validators._in()'s ValueError is not missing the attribute, expected options, and the value it got anymore.
  #​951
• Python 3.11 is now officially supported.
  #​969

v21.4.0

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Changes

• Fixed the test suite on PyPy3.8 where cloudpickle does not work.
  #​892
• Fixed coverage report for projects that use attrs and don't set a --source.
  #​895,
  #​896

v21.3.0

Compare Source

Backward-incompatible Changes

• When using @define, converters are now run by default when setting an attribute on an instance -- additionally to validators.
  I.e. the new default is on_setattr=[attrs.setters.convert, attrs.setters.validate].

  This is unfortunately a breaking change, but it was an oversight, impossible to raise a DeprecationWarning about, and it's better to fix it now while the APIs are very fresh with few users.
  #​835,
  #​886

• import attrs has finally landed!
  As of this release, you can finally import attrs using its proper name.

  Not all names from the attr namespace have been transferred; most notably attr.s and attr.ib are missing.
  See attrs.define and attrs.field if you haven't seen our next-generation APIs yet.
  A more elaborate explanation can be found On The Core API Names

  This feature is at least for one release provisional.
  We don't plan on changing anything, but such a big change is unlikely to go perfectly on the first strike.

  The API docs have been mostly updated, but it will be an ongoing effort to change everything to the new APIs.
  Please note that we have not moved -- or even removed -- anything from attr!

  Please do report any bugs or documentation inconsistencies!
  #​887

Changes

• attr.asdict(retain_collection_types=False) (default) dumps collection-esque keys as tuples.
  #​646,
  #​888
• __match_args__ are now generated to support Python 3.10's
  Structural Pattern Matching.
  This can be controlled by the match_args argument to the class decorators on Python 3.10 and later.
  On older versions, it is never added and the argument is ignored.
  #​815
• If the class-level on_setattr is set to attrs.setters.validate (default in @define and @mutable) but no field defines a validator, pretend that it's not set.
  #​817
• The generated __repr__ is significantly faster on Pythons with f-strings.
  #​819
• Attributes transformed via field_transformer are wrapped with AttrsClass again.
  #​824
• Generated source code is now cached more efficiently for identical classes.
  #​828
• Added attrs.converters.to_bool().
  #​830
• attrs.resolve_types() now resolves types of subclasses after the parents are resolved.
  #​842
  #​843
• Added new validators: lt(val) (< val), le(va) (≤ val), ge(val) (≥ val), gt(val) (> val), and maxlen(n).
  #​845
• attrs classes are now fully compatible with cloudpickle (no need to disable repr anymore).
  #​857
• Added new context manager attrs.validators.disabled() and functions attrs.validators.(set|get)_disabled().
  They deprecate attrs.(set|get)_run_validators().
  All functions are interoperable and modify the same internal state.
  They are not – and never were – thread-safe, though.
  #​859
• attrs.validators.matches_re() now accepts pre-compiled regular expressions in addition to pattern strings.
  #​877

---

v21.2.0

Compare Source

Backward-incompatible Changes

• We had to revert the recursive feature for attr.evolve() because it broke some use-cases -- sorry!
  #​806
• Python 3.4 is now blocked using packaging metadata because attrs can't be imported on it anymore.
  To ensure that 3.4 users can keep installing attrs easily, we will yank 21.1.0 from PyPI.
  This has no consequences if you pin attrs to 21.1.0.
  #​807

v21.1.0

Compare Source

Deprecations

• The long-awaited, much-talked-about, little-delivered import attrs is finally upon us!

  Since the NG APIs have now been proclaimed stable, the next release of attrs will allow you to actually import attrs.
  We're taking this opportunity to replace some defaults in our APIs that made sense in 2015, but don't in 2021.

  So please, if you have any pet peeves about defaults in attrs's APIs, now is the time to air your grievances in #​487!
  We're not gonna get such a chance for a second time, without breaking our backward-compatibility guarantees, or long deprecation cycles.
  Therefore, speak now or forever hold you peace!
  #​487

• The cmp argument to attr.s() and attr.ib() has been undeprecated
  It will continue to be supported as syntactic sugar to set eq and order in one go.

  I'm terribly sorry for the hassle around this argument!
  The reason we're bringing it back is it's usefulness regarding customization of equality/ordering.

  The cmp attribute and argument on attr.Attribute remains deprecated and will be removed later this year.
  #​773

Changes

• It's now possible to customize the behavior of eq and order by passing in a callable.
  #​435,
  #​627

• The instant favorite next-generation APIs are not provisional anymore!

  They are also officially supported by Mypy as of their 0.800 release.

  We hope the next release will already contain an (additional) importable package called attrs.
  #​668,
  #​786

• If an attribute defines a converter, the type of its parameter is used as type annotation for its corresponding __init__ parameter.

  If an attr.converters.pipe is used, the first one's is used.
  #​710

• Fixed the creation of an extra slot for an attr.ib when the parent class already has a slot with the same name.
  #​718

• __attrs__init__() will now be injected if init=False, or if auto_detect=True and a user-defined __init__() exists.

  This enables users to do "pre-init" work in their __init__() (such as super().__init__()).

  __init__() can then delegate constructor argument processing to self.__attrs_init__(*args, **kwargs).
  #​731

• bool(attr.NOTHING) is now False.
  #​732

• It's now possible to use super() inside of properties of slotted classes.
  #​747

• Allow for a __attrs_pre_init__() method that -- if defined -- will get called at the beginning of the attrs-generated __init__() method.
  #​750

• Added forgotten attr.Attribute.evolve() to type stubs.
  #​752

• attrs.evolve() now works recursively with nested attrs classes.
  #​759

• Python 3.10 is now officially supported.
  #​763

• attr.resolve_types() now takes an optional attrib argument to work inside a field_transformer.
  #​774

• ClassVars are now also detected if they come from typing-extensions.
  #​782

• To make it easier to customize attribute comparison (#​435), we have added the attr.cmp_with() helper.

  See the new docs on comparison for more details.
  #​787

• Added provisional support for static typing in pyright via the dataclass_transforms specification.
  Both the pyright specification and attrs implementation may change in future versions of both projects.

  Your constructive feedback is welcome in both attrs#​795 and pyright#​1782.
  #​796

v20.3.0

Compare Source

Backward-incompatible Changes

• attr.define(), attr.frozen(), attr.mutable(), and attr.field() remain provisional.

  This release does not change anything about them and they are already used widely in production though.

  If you wish to use them together with mypy, you can simply drop this plugin into your project.

  Feel free to provide feedback to them in the linked issue #​668.

  We will release the attrs namespace once we have the feeling that the APIs have properly settled.
  #​668

Changes

• attr.s() now has a field_transformer hook that is called for all Attributes and returns a (modified or updated) list of Attribute instances.
  attr.asdict() has a value_serializer hook that can change the way values are converted.
  Both hooks are meant to help with data (de-)serialization workflows.
  #​653
• kw_only=True now works on Python 2.
  #​700
• raise from now works on frozen classes on PyPy.
  #​703,
  #​712
• attr.asdict() and attr.astuple() now treat frozensets like sets with regards to the retain_collection_types argument.
  #​704
• The type stubs for attr.s() and attr.make_class() are not missing the collect_by_mro argument anymore.
  #​711

---

v20.2.0

Compare Source

Backward-incompatible Changes

• attr.define(), attr.frozen(), attr.mutable(), and attr.field() remain provisional.

  This release fixes a bunch of bugs and ergonomics but they remain mostly unchanged.

  If you wish to use them together with mypy, you can simply drop this plugin into your project.

  Feel free to provide feedback to them in the linked issue #​668.

  We will release the attrs namespace once we have the feeling that the APIs have properly settled.
  #​668

Changes

• attr.define() et al now correctly detect __eq__ and __ne__.
  #​671

• attr.define() et al's hybrid behavior now also works correctly when arguments are passed.
  #​675

• It's possible to define custom __setattr__ methods on slotted classes again.
  #​681

• In 20.1.0 we introduced the inherited attribute on the attr.Attribute class to differentiate attributes that have been inherited and those that have been defined directly on the class.

  It has shown to be problematic to involve that attribute when comparing instances of attr.Attribute though, because when sub-classing, attributes from base classes are suddenly not equal to themselves in a super class.

  Therefore the inherited attribute will now be ignored when hashing and comparing instances of attr.Attribute.
  #​684

• zope.interface is now a "soft dependency" when running the test suite; if zope.interface is not installed when running the test suite, the interface-related tests will be automatically skipped.
  #​685

• The ergonomics of creating frozen classes using @define(frozen=True) and sub-classing frozen classes has been improved:
  you don't have to set on_setattr=None anymore.
  #​687

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