Update attr 22.2.0 (a9960de) → 22.2.0 (683d056).

CHANGES.md

@@ -1,5 +1,6 @@
 ### 3.29.0 (2023-xx-xx xx:xx:00 UTC)
 
+* Update attr 22.2.0 (a9960de) to 22.2.0 (683d056)
 * Update diskcache 5.4.0 (1cb1425) to 5.6.1 (4d30686)
 * Update filelock 3.9.0 (ce3e891) to 3.11.0 (d3241b9)
 * Update Msgpack 1.0.4 (b5acfd5) to 1.0.5 (0516c2c)

lib/attr/__init__.py

@@ -1,9 +1,11 @@
 # SPDX-License-Identifier: MIT
 
-import sys
+"""
-import warnings
+Classes Without Boilerplate
+"""
 
 from functools import partial
+from typing import Callable
 
 from . import converters, exceptions, filters, setters, validators
 from ._cmp import cmp_using
@@ -24,30 +26,6 @@ from ._next_gen import define, field, frozen, mutable
 from ._version_info import VersionInfo
 
 
-if sys.version_info < (3, 7):  # pragma: no cover
-    warnings.warn(
-        "Running attrs on Python 3.6 is deprecated & we intend to drop "
-        "support soon. If that's a problem for you, please let us know why & "
-        "we MAY re-evaluate: <https://github.com/python-attrs/attrs/pull/993>",
-        DeprecationWarning,
-    )
-
-__version__ = "22.2.0"
-__version_info__ = VersionInfo._from_version_string(__version__)
-
-__title__ = "attrs"
-__description__ = "Classes Without Boilerplate"
-__url__ = "https://www.attrs.org/"
-__uri__ = __url__
-__doc__ = __description__ + " <" + __uri__ + ">"
-
-__author__ = "Hynek Schlawack"
-__email__ = "hs@ox.cx"
-
-__license__ = "MIT"
-__copyright__ = "Copyright (c) 2015 Hynek Schlawack"
-
-
 s = attributes = attrs
 ib = attr = attrib
 dataclass = partial(attrs, auto_attribs=True)  # happy Easter ;)
@@ -91,3 +69,64 @@ __all__ = [
     "validate",
     "validators",
 ]
+
+
+def _make_getattr(mod_name: str) -> Callable:
+    """
+    Create a metadata proxy for packaging information that uses *mod_name* in
+    its warnings and errors.
+    """
+
+    def __getattr__(name: str) -> str:
+        dunder_to_metadata = {
+            "__title__": "Name",
+            "__copyright__": "",
+            "__version__": "version",
+            "__version_info__": "version",
+            "__description__": "summary",
+            "__uri__": "",
+            "__url__": "",
+            "__author__": "",
+            "__email__": "",
+            "__license__": "license",
+        }
+        if name not in dunder_to_metadata.keys():
+            raise AttributeError(f"module {mod_name} has no attribute {name}")
+
+        import sys
+        import warnings
+
+        if sys.version_info < (3, 8):
+            from importlib_metadata import metadata
+        else:
+            from importlib.metadata import metadata
+
+        if name != "__version_info__":
+            warnings.warn(
+                f"Accessing {mod_name}.{name} is deprecated and will be "
+                "removed in a future release. Use importlib.metadata directly "
+                "to query for attrs's packaging metadata.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+
+        meta = metadata("attrs")
+        if name == "__license__":
+            return "MIT"
+        elif name == "__copyright__":
+            return "Copyright (c) 2015 Hynek Schlawack"
+        elif name in ("__uri__", "__url__"):
+            return meta["Project-URL"].split(" ", 1)[-1]
+        elif name == "__version_info__":
+            return VersionInfo._from_version_string(meta["version"])
+        elif name == "__author__":
+            return meta["Author-email"].rsplit(" ", 1)[0]
+        elif name == "__email__":
+            return meta["Author-email"].rsplit("<", 1)[1][:-1]
+
+        return meta[dunder_to_metadata[name]]
+
+    return __getattr__
+
+
+__getattr__ = _make_getattr(__name__)

lib/attr/__init__.pyi

@@ -69,6 +69,7 @@ _ValidatorArgType = Union[_ValidatorType[_T], Sequence[_ValidatorType[_T]]]
 class AttrsInstance(AttrsInstance_, Protocol):
     pass
 
+_A = TypeVar("_A", bound=AttrsInstance)
 # _make --
 
 class _Nothing(enum.Enum):
@@ -116,6 +117,7 @@ def __dataclass_transform__(
     eq_default: bool = True,
     order_default: bool = False,
     kw_only_default: bool = False,
+    frozen_default: bool = False,
     field_descriptors: Tuple[Union[type, Callable[..., Any]], ...] = (()),
 ) -> Callable[[_T], _T]: ...
 
@@ -257,6 +259,7 @@ def field(
     order: Optional[bool] = ...,
     on_setattr: Optional[_OnSetAttrArgType] = ...,
     alias: Optional[str] = ...,
+    type: Optional[type] = ...,
 ) -> Any: ...
 
 # This form catches an explicit None or no default and infers the type from the
@@ -277,6 +280,7 @@ def field(
     order: Optional[_EqOrderType] = ...,
     on_setattr: Optional[_OnSetAttrArgType] = ...,
     alias: Optional[str] = ...,
+    type: Optional[type] = ...,
 ) -> _T: ...
 
 # This form catches an explicit default argument.
@@ -296,6 +300,7 @@ def field(
     order: Optional[_EqOrderType] = ...,
     on_setattr: Optional[_OnSetAttrArgType] = ...,
     alias: Optional[str] = ...,
+    type: Optional[type] = ...,
 ) -> _T: ...
 
 # This form covers type=non-Type: e.g. forward references (str), Any
@@ -315,6 +320,7 @@ def field(
     order: Optional[_EqOrderType] = ...,
     on_setattr: Optional[_OnSetAttrArgType] = ...,
     alias: Optional[str] = ...,
+    type: Optional[type] = ...,
 ) -> Any: ...
 @overload
 @__dataclass_transform__(order_default=True, field_descriptors=(attrib, field))
@@ -426,17 +432,73 @@ def define(
 ) -> Callable[[_C], _C]: ...
 
 mutable = define
-frozen = define  # they differ only in their defaults
 
+@overload
+@__dataclass_transform__(
+    frozen_default=True, field_descriptors=(attrib, field)
+)
+def frozen(
+    maybe_cls: _C,
+    *,
+    these: Optional[Dict[str, Any]] = ...,
+    repr: bool = ...,
+    unsafe_hash: Optional[bool] = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    slots: bool = ...,
+    frozen: bool = ...,
+    weakref_slot: bool = ...,
+    str: bool = ...,
+    auto_attribs: bool = ...,
+    kw_only: bool = ...,
+    cache_hash: bool = ...,
+    auto_exc: bool = ...,
+    eq: Optional[bool] = ...,
+    order: Optional[bool] = ...,
+    auto_detect: bool = ...,
+    getstate_setstate: Optional[bool] = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+    field_transformer: Optional[_FieldTransformer] = ...,
+    match_args: bool = ...,
+) -> _C: ...
+@overload
+@__dataclass_transform__(
+    frozen_default=True, field_descriptors=(attrib, field)
+)
+def frozen(
+    maybe_cls: None = ...,
+    *,
+    these: Optional[Dict[str, Any]] = ...,
+    repr: bool = ...,
+    unsafe_hash: Optional[bool] = ...,
+    hash: Optional[bool] = ...,
+    init: bool = ...,
+    slots: bool = ...,
+    frozen: bool = ...,
+    weakref_slot: bool = ...,
+    str: bool = ...,
+    auto_attribs: bool = ...,
+    kw_only: bool = ...,
+    cache_hash: bool = ...,
+    auto_exc: bool = ...,
+    eq: Optional[bool] = ...,
+    order: Optional[bool] = ...,
+    auto_detect: bool = ...,
+    getstate_setstate: Optional[bool] = ...,
+    on_setattr: Optional[_OnSetAttrArgType] = ...,
+    field_transformer: Optional[_FieldTransformer] = ...,
+    match_args: bool = ...,
+) -> Callable[[_C], _C]: ...
 def fields(cls: Type[AttrsInstance]) -> Any: ...
 def fields_dict(cls: Type[AttrsInstance]) -> Dict[str, Attribute[Any]]: ...
 def validate(inst: AttrsInstance) -> None: ...
 def resolve_types(
-    cls: _C,
+    cls: _A,
     globalns: Optional[Dict[str, Any]] = ...,
     localns: Optional[Dict[str, Any]] = ...,
     attribs: Optional[List[Attribute[Any]]] = ...,
-) -> _C: ...
+    include_extras: bool = ...,
+) -> _A: ...
 
 # TODO: add support for returning a proper attrs class from the mypy plugin
 # we use Any instead of _CountingAttr so that e.g. `make_class('Foo',

lib/attr/_cmp.py

@@ -20,22 +20,22 @@ def cmp_using(
     class_name="Comparable",
 ):
     """
-    Create a class that can be passed into `attr.ib`'s ``eq``, ``order``, and
+    Create a class that can be passed into `attrs.field`'s ``eq``, ``order``,
-    ``cmp`` arguments to customize field comparison.
+    and ``cmp`` arguments to customize field comparison.
 
-    The resulting class will have a full set of ordering methods if
+    The resulting class will have a full set of ordering methods if at least
-    at least one of ``{lt, le, gt, ge}`` and ``eq``  are provided.
+    one of ``{lt, le, gt, ge}`` and ``eq``  are provided.
 
-    :param Optional[callable] eq: `callable` used to evaluate equality
+    :param Optional[callable] eq: `callable` used to evaluate equality of two
-        of two objects.
+        objects.
-    :param Optional[callable] lt: `callable` used to evaluate whether
+    :param Optional[callable] lt: `callable` used to evaluate whether one
-        one object is less than another object.
+        object is less than another object.
-    :param Optional[callable] le: `callable` used to evaluate whether
+    :param Optional[callable] le: `callable` used to evaluate whether one
-        one object is less than or equal to another object.
+        object is less than or equal to another object.
-    :param Optional[callable] gt: `callable` used to evaluate whether
+    :param Optional[callable] gt: `callable` used to evaluate whether one
-        one object is greater than another object.
+        object is greater than another object.
-    :param Optional[callable] ge: `callable` used to evaluate whether
+    :param Optional[callable] ge: `callable` used to evaluate whether one
-        one object is greater than or equal to another object.
+        object is greater than or equal to another object.
 
     :param bool require_same_type: When `True`, equality and ordering methods
         will return `NotImplemented` if objects are not of the same type.

lib/attr/_compat.py

@@ -9,9 +9,11 @@ import types
 import warnings
 
 from collections.abc import Mapping, Sequence  # noqa
+from typing import _GenericAlias
 
 
 PYPY = platform.python_implementation() == "PyPy"
+PY_3_9_PLUS = sys.version_info[:2] >= (3, 9)
 PY310 = sys.version_info[:2] >= (3, 10)
 PY_3_12_PLUS = sys.version_info[:2] >= (3, 12)
 
@@ -81,6 +83,13 @@ def make_set_closure_cell():
 
     # Otherwise gotta do it the hard way.
 
+    try:
+        if sys.version_info >= (3, 8):
+
+            def set_closure_cell(cell, value):
+                cell.cell_contents = value
+
+        else:
             # Create a function that will set its first cellvar to `value`.
             def set_first_cellvar_to(value):
                 x = value
@@ -92,7 +101,6 @@ def make_set_closure_cell():
                 def force_x_to_be_a_cell():  # pragma: no cover
                     return x
 
-    try:
             # Extract the code object and make sure our assumptions about
             # the closure behavior are correct.
             co = set_first_cellvar_to.__code__
@@ -101,12 +109,6 @@ def make_set_closure_cell():
 
             # Convert this code object to a code object that sets the
             # function's first _freevar_ (not cellvar) to the argument.
-        if sys.version_info >= (3, 8):
-
-            def set_closure_cell(cell, value):
-                cell.cell_contents = value
-
-        else:
             args = [co.co_argcount]
             args.append(co.co_kwonlyargcount)
             args.extend(
@@ -174,3 +176,10 @@ set_closure_cell = make_set_closure_cell()
 # don't have a direct reference to the thread-local in their globals dict.
 # If they have such a reference, it breaks cloudpickle.
 repr_context = threading.local()
+
+
+def get_generic_base(cl):
+    """If this is a generic class (A[str]), return the generic base for it."""
+    if cl.__class__ is _GenericAlias:
+        return cl.__origin__
+    return None

lib/attr/_funcs.py

@@ -3,6 +3,7 @@
 
 import copy
 
+from ._compat import PY_3_9_PLUS, get_generic_base
 from ._make import NOTHING, _obj_setattr, fields
 from .exceptions import AttrsAttributeNotFoundError
 
@@ -16,13 +17,13 @@ def asdict(
     value_serializer=None,
 ):
     """
-    Return the ``attrs`` attribute values of *inst* as a dict.
+    Return the *attrs* attribute values of *inst* as a dict.
 
-    Optionally recurse into other ``attrs``-decorated classes.
+    Optionally recurse into other *attrs*-decorated classes.
 
-    :param inst: Instance of an ``attrs``-decorated class.
+    :param inst: Instance of an *attrs*-decorated class.
     :param bool recurse: Recurse into classes that are also
-        ``attrs``-decorated.
+        *attrs*-decorated.
     :param callable filter: A callable whose return code determines whether an
         attribute or element is included (``True``) or dropped (``False``).  Is
         called with the `attrs.Attribute` as the first argument and the
@@ -40,7 +41,7 @@ def asdict(
 
     :rtype: return type of *dict_factory*
 
-    :raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs``
+    :raise attrs.exceptions.NotAnAttrsClassError: If *cls* is not an *attrs*
         class.
 
     ..  versionadded:: 16.0.0 *dict_factory*
@@ -195,13 +196,13 @@ def astuple(
     retain_collection_types=False,
 ):
     """
-    Return the ``attrs`` attribute values of *inst* as a tuple.
+    Return the *attrs* attribute values of *inst* as a tuple.
 
-    Optionally recurse into other ``attrs``-decorated classes.
+    Optionally recurse into other *attrs*-decorated classes.
 
-    :param inst: Instance of an ``attrs``-decorated class.
+    :param inst: Instance of an *attrs*-decorated class.
     :param bool recurse: Recurse into classes that are also
-        ``attrs``-decorated.
+        *attrs*-decorated.
     :param callable filter: A callable whose return code determines whether an
         attribute or element is included (``True``) or dropped (``False``).  Is
         called with the `attrs.Attribute` as the first argument and the
@@ -215,7 +216,7 @@ def astuple(
 
     :rtype: return type of *tuple_factory*
 
-    :raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs``
+    :raise attrs.exceptions.NotAnAttrsClassError: If *cls* is not an *attrs*
         class.
 
     ..  versionadded:: 16.2.0
@@ -289,28 +290,48 @@ def astuple(
 
 def has(cls):
     """
-    Check whether *cls* is a class with ``attrs`` attributes.
+    Check whether *cls* is a class with *attrs* attributes.
 
     :param type cls: Class to introspect.
     :raise TypeError: If *cls* is not a class.
 
     :rtype: bool
     """
-    return getattr(cls, "__attrs_attrs__", None) is not None
+    attrs = getattr(cls, "__attrs_attrs__", None)
+    if attrs is not None:
+        return True
+
+    # No attrs, maybe it's a specialized generic (A[str])?
+    generic_base = get_generic_base(cls)
+    if generic_base is not None:
+        generic_attrs = getattr(generic_base, "__attrs_attrs__", None)
+        if generic_attrs is not None:
+            # Stick it on here for speed next time.
+            cls.__attrs_attrs__ = generic_attrs
+        return generic_attrs is not None
+    return False
 
 
 def assoc(inst, **changes):
     """
     Copy *inst* and apply *changes*.
 
-    :param inst: Instance of a class with ``attrs`` attributes.
+    This is different from `evolve` that applies the changes to the arguments
+    that create the new instance.
+
+    `evolve`'s behavior is preferable, but there are `edge cases`_ where it
+    doesn't work. Therefore `assoc` is deprecated, but will not be removed.
+
+    .. _`edge cases`: https://github.com/python-attrs/attrs/issues/251
+
+    :param inst: Instance of a class with *attrs* attributes.
     :param changes: Keyword changes in the new copy.
 
     :return: A copy of inst with *changes* incorporated.
 
-    :raise attr.exceptions.AttrsAttributeNotFoundError: If *attr_name* couldn't
+    :raise attrs.exceptions.AttrsAttributeNotFoundError: If *attr_name*
-        be found on *cls*.
+        couldn't be found on *cls*.
-    :raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs``
+    :raise attrs.exceptions.NotAnAttrsClassError: If *cls* is not an *attrs*
         class.
 
     ..  deprecated:: 17.1.0
@@ -318,13 +339,6 @@ def assoc(inst, **changes):
         This function will not be removed du to the slightly different approach
         compared to `attrs.evolve`.
     """
-    import warnings
-
-    warnings.warn(
-        "assoc is deprecated and will be removed after 2018/01.",
-        DeprecationWarning,
-        stacklevel=2,
-    )
     new = copy.copy(inst)
     attrs = fields(inst.__class__)
     for k, v in changes.items():
@@ -337,22 +351,55 @@ def assoc(inst, **changes):
     return new
 
 
-def evolve(inst, **changes):
+def evolve(*args, **changes):
     """
-    Create a new instance, based on *inst* with *changes* applied.
+    Create a new instance, based on the first positional argument with
+    *changes* applied.
 
-    :param inst: Instance of a class with ``attrs`` attributes.
+    :param inst: Instance of a class with *attrs* attributes.
     :param changes: Keyword changes in the new copy.
 
     :return: A copy of inst with *changes* incorporated.
 
     :raise TypeError: If *attr_name* couldn't be found in the class
         ``__init__``.
-    :raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs``
+    :raise attrs.exceptions.NotAnAttrsClassError: If *cls* is not an *attrs*
         class.
 
     .. versionadded:: 17.1.0
+    .. deprecated:: 23.1.0
+       It is now deprecated to pass the instance using the keyword argument
+       *inst*. It will raise a warning until at least April 2024, after which
+       it will become an error. Always pass the instance as a positional
+       argument.
     """
+    # Try to get instance by positional argument first.
+    # Use changes otherwise and warn it'll break.
+    if args:
+        try:
+            (inst,) = args
+        except ValueError:
+            raise TypeError(
+                f"evolve() takes 1 positional argument, but {len(args)} "
+                "were given"
+            ) from None
+    else:
+        try:
+            inst = changes.pop("inst")
+        except KeyError:
+            raise TypeError(
+                "evolve() missing 1 required positional argument: 'inst'"
+            ) from None
+
+        import warnings
+
+        warnings.warn(
+            "Passing the instance per keyword argument is deprecated and "
+            "will stop working in, or after, April 2024.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+
     cls = inst.__class__
     attrs = fields(cls)
     for a in attrs:
@@ -366,7 +413,9 @@ def evolve(inst, **changes):
     return cls(**changes)
 
 
-def resolve_types(cls, globalns=None, localns=None, attribs=None):
+def resolve_types(
+    cls, globalns=None, localns=None, attribs=None, include_extras=True
+):
     """
     Resolve any strings and forward annotations in type annotations.
 
@@ -385,10 +434,14 @@ def resolve_types(cls, globalns=None, localns=None, attribs=None):
     :param Optional[dict] localns: Dictionary containing local variables.
     :param Optional[list] attribs: List of attribs for the given class.
         This is necessary when calling from inside a ``field_transformer``
-        since *cls* is not an ``attrs`` class yet.
+        since *cls* is not an *attrs* class yet.
+    :param bool include_extras: Resolve more accurately, if possible.
+        Pass ``include_extras`` to ``typing.get_hints``, if supported by the
+        typing module. On supported Python versions (3.9+), this resolves the
+        types more accurately.
 
     :raise TypeError: If *cls* is not a class.
-    :raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs``
+    :raise attrs.exceptions.NotAnAttrsClassError: If *cls* is not an *attrs*
         class and you didn't pass any attribs.
     :raise NameError: If types cannot be resolved because of missing variables.
 
@@ -398,6 +451,7 @@ def resolve_types(cls, globalns=None, localns=None, attribs=None):
 
     ..  versionadded:: 20.1.0
     ..  versionadded:: 21.1.0 *attribs*
+    ..  versionadded:: 23.1.0 *include_extras*
 
     """
     # Since calling get_type_hints is expensive we cache whether we've
@@ -405,7 +459,12 @@ def resolve_types(cls, globalns=None, localns=None, attribs=None):
     if getattr(cls, "__attrs_types_resolved__", None) != cls:
         import typing
 
-        hints = typing.get_type_hints(cls, globalns=globalns, localns=localns)
+        kwargs = {"globalns": globalns, "localns": localns}
+
+        if PY_3_9_PLUS:
+            kwargs["include_extras"] = include_extras
+
+        hints = typing.get_type_hints(cls, **kwargs)
         for field in fields(cls) if attribs is None else attribs:
             if field.name in hints:
                 # Since fields have been frozen we must work around it.

lib/attr/_make.py

@@ -12,7 +12,12 @@ from operator import itemgetter
 # We need to import _compat itself in addition to the _compat members to avoid
 # having the thread-local in the globals here.
 from . import _compat, _config, setters
-from ._compat import PY310, PYPY, _AnnotationExtractor, set_closure_cell
+from ._compat import (
+    PY310,
+    _AnnotationExtractor,
+    get_generic_base,
+    set_closure_cell,
+)
 from .exceptions import (
     DefaultAlreadySetError,
     FrozenInstanceError,
@@ -109,9 +114,12 @@ def attrib(
     ..  warning::
 
         Does *not* do anything unless the class is also decorated with
-        `attr.s`!
+        `attr.s` / `attrs.define` / et cetera!
 
-    :param default: A value that is used if an ``attrs``-generated ``__init__``
+    Please consider using `attrs.field` in new code (``attr.ib`` will *never*
+    go away, though).
+
+    :param default: A value that is used if an *attrs*-generated ``__init__``
         is used and no value is passed while instantiating or the attribute is
         excluded using ``init=False``.
 
@@ -130,7 +138,7 @@ def attrib(
     :param callable factory: Syntactic sugar for
         ``default=attr.Factory(factory)``.
 
-    :param validator: `callable` that is called by ``attrs``-generated
+    :param validator: `callable` that is called by *attrs*-generated
         ``__init__`` methods after the instance has been initialized.  They
         receive the initialized instance, the :func:`~attrs.Attribute`, and the
         passed value.
@@ -142,7 +150,7 @@ def attrib(
         all pass.
 
         Validators can be globally disabled and re-enabled using
-        `get_run_validators`.
+        `attrs.validators.get_disabled` / `attrs.validators.set_disabled`.
 
         The validator can also be set using decorator notation as shown below.
 
@@ -184,7 +192,7 @@ def attrib(
         value.  In that case this attributed is unconditionally initialized
         with the specified default value or factory.
     :param callable converter: `callable` that is called by
-        ``attrs``-generated ``__init__`` methods to convert attribute's value
+        *attrs*-generated ``__init__`` methods to convert attribute's value
         to the desired format.  It is given the passed-in value, and the
         returned value will be used as the new value of the attribute.  The
         value is converted before being passed to the validator, if any.
@@ -197,7 +205,7 @@ def attrib(
         Regardless of the approach used, the type will be stored on
         ``Attribute.type``.
 
-        Please note that ``attrs`` doesn't do anything with this metadata by
+        Please note that *attrs* doesn't do anything with this metadata by
         itself. You can use it as part of your own code or for
         `static type checking <types>`.
     :param kw_only: Make this attribute keyword-only in the generated
@@ -582,29 +590,20 @@ def _transform_attrs(
     return _Attributes((AttrsClass(attrs), base_attrs, base_attr_map))
 
 
-if PYPY:
+def _frozen_setattrs(self, name, value):
-
-    def _frozen_setattrs(self, name, value):
     """
     Attached to frozen classes as __setattr__.
     """
     if isinstance(self, BaseException) and name in (
         "__cause__",
         "__context__",
+        "__traceback__",
     ):
         BaseException.__setattr__(self, name, value)
         return
 
     raise FrozenInstanceError()
 
-else:
-
-    def _frozen_setattrs(self, name, value):
-        """
-        Attached to frozen classes as __setattr__.
-        """
-        raise FrozenInstanceError()
-
 
 def _frozen_delattrs(self, name):
     """
@@ -940,6 +939,12 @@ class _ClassBuilder:
             Automatically created by attrs.
             """
             __bound_setattr = _obj_setattr.__get__(self)
+            if isinstance(state, tuple):
+                # Backward compatibility with attrs instances pickled with
+                # attrs versions before v22.2.0 which stored tuples.
+                for name, value in zip(state_attr_names, state):
+                    __bound_setattr(name, value)
+            else:
                 for name in state_attr_names:
                     if name in state:
                         __bound_setattr(name, state[name])
@@ -1220,12 +1225,15 @@ def attrs(
     A class decorator that adds :term:`dunder methods` according to the
     specified attributes using `attr.ib` or the *these* argument.
 
+    Please consider using `attrs.define` / `attrs.frozen` in new code
+    (``attr.s`` will *never* go away, though).
+
     :param these: A dictionary of name to `attr.ib` mappings.  This is
         useful to avoid the definition of your attributes within the class body
         because you can't (e.g. if you want to add ``__repr__`` methods to
         Django models) or don't want to.
 
-        If *these* is not ``None``, ``attrs`` will *not* search the class body
+        If *these* is not ``None``, *attrs* will *not* search the class body
         for attributes and will *not* remove any attributes from it.
 
         The order is deduced from the order of the attributes inside *these*.
@@ -1242,14 +1250,14 @@ def attrs(
         inherited from some base class).
 
         So for example by implementing ``__eq__`` on a class yourself,
-        ``attrs`` will deduce ``eq=False`` and will create *neither*
+        *attrs* will deduce ``eq=False`` and will create *neither*
         ``__eq__`` *nor* ``__ne__`` (but Python classes come with a sensible
         ``__ne__`` by default, so it *should* be enough to only implement
         ``__eq__`` in most cases).
 
         .. warning::
 
-           If you prevent ``attrs`` from creating the ordering methods for you
+           If you prevent *attrs* from creating the ordering methods for you
            (``order=False``, e.g. by implementing ``__le__``), it becomes
            *your* responsibility to make sure its ordering is sound. The best
            way is to use the `functools.total_ordering` decorator.
@@ -1259,14 +1267,14 @@ def attrs(
         *cmp*, or *hash* overrides whatever *auto_detect* would determine.
 
     :param bool repr: Create a ``__repr__`` method with a human readable
-        representation of ``attrs`` attributes..
+        representation of *attrs* attributes..
     :param bool str: Create a ``__str__`` method that is identical to
         ``__repr__``.  This is usually not necessary except for
         `Exception`\ s.
     :param Optional[bool] eq: If ``True`` or ``None`` (default), add ``__eq__``
         and ``__ne__`` methods that check two instances for equality.
 
-        They compare the instances as if they were tuples of their ``attrs``
+        They compare the instances as if they were tuples of their *attrs*
         attributes if and only if the types of both classes are *identical*!
     :param Optional[bool] order: If ``True``, add ``__lt__``, ``__le__``,
         ``__gt__``, and ``__ge__`` methods that behave like *eq* above and
@@ -1277,7 +1285,7 @@ def attrs(
     :param Optional[bool] unsafe_hash: If ``None`` (default), the ``__hash__``
         method is generated according how *eq* and *frozen* are set.
 
-        1. If *both* are True, ``attrs`` will generate a ``__hash__`` for you.
+        1. If *both* are True, *attrs* will generate a ``__hash__`` for you.
         2. If *eq* is True and *frozen* is False, ``__hash__`` will be set to
            None, marking it unhashable (which it is).
         3. If *eq* is False, ``__hash__`` will be left untouched meaning the
@@ -1285,7 +1293,7 @@ def attrs(
            ``object``, this means it will fall back to id-based hashing.).
 
         Although not recommended, you can decide for yourself and force
-        ``attrs`` to create one (e.g. if the class is immutable even though you
+        *attrs* to create one (e.g. if the class is immutable even though you
         didn't freeze it programmatically) by passing ``True`` or not.  Both of
         these cases are rather special and should be used carefully.
 
@@ -1296,7 +1304,7 @@ def attrs(
     :param Optional[bool] hash: Alias for *unsafe_hash*. *unsafe_hash* takes
         precedence.
     :param bool init: Create a ``__init__`` method that initializes the
-        ``attrs`` attributes. Leading underscores are stripped for the argument
+        *attrs* attributes. Leading underscores are stripped for the argument
         name. If a ``__attrs_pre_init__`` method exists on the class, it will
         be called before the class is initialized. If a ``__attrs_post_init__``
         method exists on the class, it will be called after the class is fully
@@ -1312,7 +1320,7 @@ def attrs(
         we encourage you to read the :term:`glossary entry <slotted classes>`.
     :param bool frozen: Make instances immutable after initialization.  If
         someone attempts to modify a frozen instance,
-        `attr.exceptions.FrozenInstanceError` is raised.
+        `attrs.exceptions.FrozenInstanceError` is raised.
 
         .. note::
 
@@ -1337,7 +1345,7 @@ def attrs(
     :param bool auto_attribs: If ``True``, collect :pep:`526`-annotated
         attributes from the class body.
 
-        In this case, you **must** annotate every field.  If ``attrs``
+        In this case, you **must** annotate every field.  If *attrs*
         encounters a field that is set to an `attr.ib` but lacks a type
         annotation, an `attr.exceptions.UnannotatedAttributeError` is
         raised.  Use ``field_name: typing.Any = attr.ib(...)`` if you don't
@@ -1353,9 +1361,9 @@ def attrs(
 
         .. warning::
            For features that use the attribute name to create decorators (e.g.
-           `validators <validators>`), you still *must* assign `attr.ib` to
+           :ref:`validators <validators>`), you still *must* assign `attr.ib`
-           them. Otherwise Python will either not find the name or try to use
+           to them. Otherwise Python will either not find the name or try to
-           the default value to call e.g. ``validator`` on it.
+           use the default value to call e.g. ``validator`` on it.
 
            These errors can be quite confusing and probably the most common bug
            report on our bug tracker.
@@ -1376,14 +1384,14 @@ def attrs(
         class:
 
         - the values for *eq*, *order*, and *hash* are ignored and the
-          instances compare and hash by the instance's ids (N.B. ``attrs`` will
+          instances compare and hash by the instance's ids (N.B. *attrs* will
           *not* remove existing implementations of ``__hash__`` or the equality
           methods. It just won't add own ones.),
         - all attributes that are either passed into ``__init__`` or have a
           default value are additionally available as a tuple in the ``args``
           attribute,
         - the value of *str* is ignored leaving ``__str__`` to base classes.
-    :param bool collect_by_mro: Setting this to `True` fixes the way ``attrs``
+    :param bool collect_by_mro: Setting this to `True` fixes the way *attrs*
        collects attributes from base classes.  The default behavior is
        incorrect in certain cases of multiple inheritance.  It should be on by
        default but is kept off for backward-compatibility.
@@ -1422,7 +1430,7 @@ def attrs(
 
     :param Optional[callable] field_transformer:
         A function that is called with the original class object and all
-        fields right before ``attrs`` finalizes the class.  You can use
+        fields right before *attrs* finalizes the class.  You can use
         this, e.g., to automatically add converters or validators to
         fields based on their types.  See `transform-fields` for more details.
 
@@ -1900,7 +1908,7 @@ def _add_repr(cls, ns=None, attrs=None):
 
 def fields(cls):
     """
-    Return the tuple of ``attrs`` attributes for a class.
+    Return the tuple of *attrs* attributes for a class.
 
     The tuple also allows accessing the fields by their names (see below for
     examples).
@@ -1908,31 +1916,45 @@ def fields(cls):
     :param type cls: Class to introspect.
 
     :raise TypeError: If *cls* is not a class.
-    :raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs``
+    :raise attrs.exceptions.NotAnAttrsClassError: If *cls* is not an *attrs*
         class.
 
     :rtype: tuple (with name accessors) of `attrs.Attribute`
 
     .. versionchanged:: 16.2.0 Returned tuple allows accessing the fields
        by name.
+    .. versionchanged:: 23.1.0 Add support for generic classes.
     """
-    if not isinstance(cls, type):
+    generic_base = get_generic_base(cls)
+
+    if generic_base is None and not isinstance(cls, type):
         raise TypeError("Passed object must be a class.")
+
     attrs = getattr(cls, "__attrs_attrs__", None)
+
     if attrs is None:
+        if generic_base is not None:
+            attrs = getattr(generic_base, "__attrs_attrs__", None)
+            if attrs is not None:
+                # Even though this is global state, stick it on here to speed
+                # it up. We rely on `cls` being cached for this to be
+                # efficient.
+                cls.__attrs_attrs__ = attrs
+                return attrs
         raise NotAnAttrsClassError(f"{cls!r} is not an attrs-decorated class.")
+
     return attrs
 
 
 def fields_dict(cls):
     """
-    Return an ordered dictionary of ``attrs`` attributes for a class, whose
+    Return an ordered dictionary of *attrs* attributes for a class, whose
     keys are the attribute names.
 
     :param type cls: Class to introspect.
 
     :raise TypeError: If *cls* is not a class.
-    :raise attr.exceptions.NotAnAttrsClassError: If *cls* is not an ``attrs``
+    :raise attrs.exceptions.NotAnAttrsClassError: If *cls* is not an *attrs*
         class.
 
     :rtype: dict
@@ -1953,7 +1975,7 @@ def validate(inst):
 
     Leaves all exceptions through.
 
-    :param inst: Instance of a class with ``attrs`` attributes.
+    :param inst: Instance of a class with *attrs* attributes.
     """
     if _config._run_validators is False:
         return
@@ -2391,6 +2413,10 @@ class Attribute:
     """
     *Read-only* representation of an attribute.
 
+    .. warning::
+
+       You should never instantiate this class yourself.
+
     The class has *all* arguments of `attr.ib` (except for ``factory``
     which is only syntactic sugar for ``default=Factory(...)`` plus the
     following:
@@ -2536,13 +2562,13 @@ class Attribute:
             **inst_dict,
         )
 
-    # Don't use attr.evolve since fields(Attribute) doesn't work
+    # Don't use attrs.evolve since fields(Attribute) doesn't work
     def evolve(self, **changes):
         """
         Copy *self* and apply *changes*.
 
-        This works similarly to `attr.evolve` but that function does not work
+        This works similarly to `attrs.evolve` but that function does not work
-        with ``Attribute``.
+        with `Attribute`.
 
         It is mainly meant to be used for `transform-fields`.
 
@@ -2777,10 +2803,6 @@ class Factory:
     __slots__ = ("factory", "takes_self")
 
     def __init__(self, factory, takes_self=False):
-        """
-        `Factory` is part of the default machinery so if we want a default
-        value here, we have to implement it ourselves.
-        """
         self.factory = factory
         self.takes_self = takes_self
 
@@ -2818,13 +2840,13 @@ Factory = _add_hash(_add_eq(_add_repr(Factory, attrs=_f), attrs=_f), attrs=_f)
 
 
 def make_class(name, attrs, bases=(object,), **attributes_arguments):
-    """
+    r"""
     A quick way to create a new class called *name* with *attrs*.
 
     :param str name: The name for the new class.
 
     :param attrs: A list of names or a dictionary of mappings of names to
-        attributes.
+        `attr.ib`\ s / `attrs.field`\ s.
 
         The order is deduced from the order of the names or attributes inside
         *attrs*.  Otherwise the order of the definition of the attributes is

lib/attr/_next_gen.py

@@ -46,7 +46,7 @@ def define(
     match_args=True,
 ):
     r"""
-    Define an ``attrs`` class.
+    Define an *attrs* class.
 
     Differences to the classic `attr.s` that it uses underneath:
 
@@ -167,6 +167,7 @@ def field(
     hash=None,
     init=True,
     metadata=None,
+    type=None,
     converter=None,
     factory=None,
     kw_only=False,
@@ -179,6 +180,10 @@ def field(
     Identical to `attr.ib`, except keyword-only and with some arguments
     removed.
 
+    .. versionadded:: 22.3.0
+       The *type* parameter has been re-added; mostly for
+       {func}`attrs.make_class`. Please note that type checkers ignore this
+       metadata.
     .. versionadded:: 20.1.0
     """
     return attrib(
@@ -188,6 +193,7 @@ def field(
         hash=hash,
         init=init,
         metadata=metadata,
+        type=type,
         converter=converter,
         factory=factory,
         kw_only=kw_only,

lib/attr/exceptions.py

@@ -34,7 +34,7 @@ class FrozenAttributeError(FrozenError):
 
 class AttrsAttributeNotFoundError(ValueError):
     """
-    An ``attrs`` function couldn't find an attribute that the user asked for.
+    An *attrs* function couldn't find an attribute that the user asked for.
 
     .. versionadded:: 16.2.0
     """
@@ -42,7 +42,7 @@ class AttrsAttributeNotFoundError(ValueError):
 
 class NotAnAttrsClassError(ValueError):
     """
-    A non-``attrs`` class has been passed into an ``attrs`` function.
+    A non-*attrs* class has been passed into an *attrs* function.
 
     .. versionadded:: 16.2.0
     """
@@ -50,7 +50,7 @@ class NotAnAttrsClassError(ValueError):
 
 class DefaultAlreadySetError(RuntimeError):
     """
-    A default has been set using ``attr.ib()`` and is attempted to be reset
+    A default has been set when defining the field and is attempted to be reset
     using the decorator.
 
     .. versionadded:: 17.1.0
@@ -59,8 +59,7 @@ class DefaultAlreadySetError(RuntimeError):
 
 class UnannotatedAttributeError(RuntimeError):
     """
-    A class with ``auto_attribs=True`` has an ``attr.ib()`` without a type
+    A class with ``auto_attribs=True`` has a field without a type annotation.
-    annotation.
 
     .. versionadded:: 17.3.0
     """
@@ -68,7 +67,7 @@ class UnannotatedAttributeError(RuntimeError):
 
 class PythonTooOldError(RuntimeError):
     """
-    It was attempted to use an ``attrs`` feature that requires a newer Python
+    It was attempted to use an *attrs* feature that requires a newer Python
     version.
 
     .. versionadded:: 18.2.0
@@ -77,8 +76,8 @@ class PythonTooOldError(RuntimeError):
 
 class NotCallableError(TypeError):
     """
-    A ``attr.ib()`` requiring a callable has been set with a value
+    A field requiring a callable has been set with a value that is not
-    that is not callable.
+    callable.
 
     .. versionadded:: 19.2.0
     """

lib/attr/validators.py

@@ -9,6 +9,7 @@ import operator
 import re
 
 from contextlib import contextmanager
+from re import Pattern
 
 from ._config import get_run_validators, set_run_validators
 from ._make import _AndValidator, and_, attrib, attrs
@@ -16,12 +17,6 @@ from .converters import default_if_none
 from .exceptions import NotCallableError
 
 
-try:
-    Pattern = re.Pattern
-except AttributeError:  # Python <3.7 lacks a Pattern type.
-    Pattern = type(re.compile(""))
-
-
 __all__ = [
     "and_",
     "deep_iterable",
@@ -249,7 +244,17 @@ def provides(interface):
     :raises TypeError: With a human readable error message, the attribute
         (of type `attrs.Attribute`), the expected interface, and the
         value it got.
+
+    .. deprecated:: 23.1.0
     """
+    import warnings
+
+    warnings.warn(
+        "attrs's zope-interface support is deprecated and will be removed in, "
+        "or after, April 2024.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
     return _ProvidesValidator(interface)
 
 
@@ -275,15 +280,16 @@ def optional(validator):
     which can be set to ``None`` in addition to satisfying the requirements of
     the sub-validator.
 
-    :param validator: A validator (or a list of validators) that is used for
+    :param Callable | tuple[Callable] | list[Callable] validator: A validator
-        non-``None`` values.
+        (or validators) that is used for non-``None`` values.
-    :type validator: callable or `list` of callables.
 
     .. versionadded:: 15.1.0
     .. versionchanged:: 17.1.0 *validator* can be a list of validators.
+    .. versionchanged:: 23.1.0 *validator* can also be a tuple of validators.
     """
-    if isinstance(validator, list):
+    if isinstance(validator, (list, tuple)):
         return _OptionalValidator(_AndValidator(validator))
+
     return _OptionalValidator(validator)
 
 
@@ -359,13 +365,13 @@ class _IsCallableValidator:
 
 def is_callable():
     """
-    A validator that raises a `attr.exceptions.NotCallableError` if the
+    A validator that raises a `attrs.exceptions.NotCallableError` if the
     initializer is called with a value for this particular attribute
     that is not callable.
 
     .. versionadded:: 19.1.0
 
-    :raises `attr.exceptions.NotCallableError`: With a human readable error
+    :raises attrs.exceptions.NotCallableError: With a human readable error
         message containing the attribute (`attrs.Attribute`) name,
         and the value it got.
     """

lib/attr/validators.pyi

@@ -51,7 +51,9 @@ def instance_of(
 def instance_of(type: Tuple[type, ...]) -> _ValidatorType[Any]: ...
 def provides(interface: Any) -> _ValidatorType[Any]: ...
 def optional(
-    validator: Union[_ValidatorType[_T], List[_ValidatorType[_T]]]
+    validator: Union[
+        _ValidatorType[_T], List[_ValidatorType[_T]], Tuple[_ValidatorType[_T]]
+    ]
 ) -> _ValidatorType[Optional[_T]]: ...
 def in_(options: Container[_T]) -> _ValidatorType[_T]: ...
 def and_(*validators: _ValidatorType[_T]) -> _ValidatorType[_T]: ...
@@ -82,5 +84,5 @@ def not_(
     validator: _ValidatorType[_T],
     *,
     msg: Optional[str] = None,
-    exc_types: Union[Type[Exception], Iterable[Type[Exception]]] = ...
+    exc_types: Union[Type[Exception], Iterable[Type[Exception]]] = ...,
 ) -> _ValidatorType[_T]: ...