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+import enum
+import sys
+
+from typing import (
+ Any,
+ Callable,
+ Generic,
+ Literal,
+ Mapping,
+ Protocol,
+ Sequence,
+ TypeVar,
+ overload,
+)
+
+# `import X as X` is required to make these public
+from . import converters as converters
+from . import exceptions as exceptions
+from . import filters as filters
+from . import setters as setters
+from . import validators as validators
+from ._cmp import cmp_using as cmp_using
+from ._typing_compat import AttrsInstance_
+from ._version_info import VersionInfo
+from attrs import (
+ define as define,
+ field as field,
+ mutable as mutable,
+ frozen as frozen,
+ _EqOrderType,
+ _ValidatorType,
+ _ConverterType,
+ _ReprArgType,
+ _OnSetAttrType,
+ _OnSetAttrArgType,
+ _FieldTransformer,
+ _ValidatorArgType,
+)
+
+if sys.version_info >= (3, 10):
+ from typing import TypeGuard, TypeAlias
+else:
+ from typing_extensions import TypeGuard, TypeAlias
+
+if sys.version_info >= (3, 11):
+ from typing import dataclass_transform
+else:
+ from typing_extensions import dataclass_transform
+
+__version__: str
+__version_info__: VersionInfo
+__title__: str
+__description__: str
+__url__: str
+__uri__: str
+__author__: str
+__email__: str
+__license__: str
+__copyright__: str
+
+_T = TypeVar("_T")
+_C = TypeVar("_C", bound=type)
+
+_FilterType = Callable[["Attribute[_T]", _T], bool]
+
+# We subclass this here to keep the protocol's qualified name clean.
+class AttrsInstance(AttrsInstance_, Protocol):
+ pass
+
+_A = TypeVar("_A", bound=type[AttrsInstance])
+
+class _Nothing(enum.Enum):
+ NOTHING = enum.auto()
+
+NOTHING = _Nothing.NOTHING
+NothingType: TypeAlias = Literal[_Nothing.NOTHING]
+
+# NOTE: Factory lies about its return type to make this possible:
+# `x: List[int] # = Factory(list)`
+# Work around mypy issue #4554 in the common case by using an overload.
+
+@overload
+def Factory(factory: Callable[[], _T]) -> _T: ...
+@overload
+def Factory(
+ factory: Callable[[Any], _T],
+ takes_self: Literal[True],
+) -> _T: ...
+@overload
+def Factory(
+ factory: Callable[[], _T],
+ takes_self: Literal[False],
+) -> _T: ...
+
+In = TypeVar("In")
+Out = TypeVar("Out")
+
+class Converter(Generic[In, Out]):
+ @overload
+ def __init__(self, converter: Callable[[In], Out]) -> None: ...
+ @overload
+ def __init__(
+ self,
+ converter: Callable[[In, AttrsInstance, Attribute], Out],
+ *,
+ takes_self: Literal[True],
+ takes_field: Literal[True],
+ ) -> None: ...
+ @overload
+ def __init__(
+ self,
+ converter: Callable[[In, Attribute], Out],
+ *,
+ takes_field: Literal[True],
+ ) -> None: ...
+ @overload
+ def __init__(
+ self,
+ converter: Callable[[In, AttrsInstance], Out],
+ *,
+ takes_self: Literal[True],
+ ) -> None: ...
+
+class Attribute(Generic[_T]):
+ name: str
+ default: _T | None
+ validator: _ValidatorType[_T] | None
+ repr: _ReprArgType
+ cmp: _EqOrderType
+ eq: _EqOrderType
+ order: _EqOrderType
+ hash: bool | None
+ init: bool
+ converter: Converter | None
+ metadata: dict[Any, Any]
+ type: type[_T] | None
+ kw_only: bool
+ on_setattr: _OnSetAttrType
+ alias: str | None
+
+ def evolve(self, **changes: Any) -> "Attribute[Any]": ...
+
+# NOTE: We had several choices for the annotation to use for type arg:
+# 1) Type[_T]
+# - Pros: Handles simple cases correctly
+# - Cons: Might produce less informative errors in the case of conflicting
+# TypeVars e.g. `attr.ib(default='bad', type=int)`
+# 2) Callable[..., _T]
+# - Pros: Better error messages than #1 for conflicting TypeVars
+# - Cons: Terrible error messages for validator checks.
+# e.g. attr.ib(type=int, validator=validate_str)
+# -> error: Cannot infer function type argument
+# 3) type (and do all of the work in the mypy plugin)
+# - Pros: Simple here, and we could customize the plugin with our own errors.
+# - Cons: Would need to write mypy plugin code to handle all the cases.
+# We chose option #1.
+
+# `attr` lies about its return type to make the following possible:
+# attr() -> Any
+# attr(8) -> int
+# attr(validator=<some callable>) -> Whatever the callable expects.
+# This makes this type of assignments possible:
+# x: int = attr(8)
+#
+# This form catches explicit None or no default but with no other arguments
+# returns Any.
+@overload
+def attrib(
+ default: None = ...,
+ validator: None = ...,
+ repr: _ReprArgType = ...,
+ cmp: _EqOrderType | None = ...,
+ hash: bool | None = ...,
+ init: bool = ...,
+ metadata: Mapping[Any, Any] | None = ...,
+ type: None = ...,
+ converter: None = ...,
+ factory: None = ...,
+ kw_only: bool = ...,
+ eq: _EqOrderType | None = ...,
+ order: _EqOrderType | None = ...,
+ on_setattr: _OnSetAttrArgType | None = ...,
+ alias: str | None = ...,
+) -> Any: ...
+
+# This form catches an explicit None or no default and infers the type from the
+# other arguments.
+@overload
+def attrib(
+ default: None = ...,
+ validator: _ValidatorArgType[_T] | None = ...,
+ repr: _ReprArgType = ...,
+ cmp: _EqOrderType | None = ...,
+ hash: bool | None = ...,
+ init: bool = ...,
+ metadata: Mapping[Any, Any] | None = ...,
+ type: type[_T] | None = ...,
+ converter: _ConverterType
+ | list[_ConverterType]
+ | tuple[_ConverterType]
+ | None = ...,
+ factory: Callable[[], _T] | None = ...,
+ kw_only: bool = ...,
+ eq: _EqOrderType | None = ...,
+ order: _EqOrderType | None = ...,
+ on_setattr: _OnSetAttrArgType | None = ...,
+ alias: str | None = ...,
+) -> _T: ...
+
+# This form catches an explicit default argument.
+@overload
+def attrib(
+ default: _T,
+ validator: _ValidatorArgType[_T] | None = ...,
+ repr: _ReprArgType = ...,
+ cmp: _EqOrderType | None = ...,
+ hash: bool | None = ...,
+ init: bool = ...,
+ metadata: Mapping[Any, Any] | None = ...,
+ type: type[_T] | None = ...,
+ converter: _ConverterType
+ | list[_ConverterType]
+ | tuple[_ConverterType]
+ | None = ...,
+ factory: Callable[[], _T] | None = ...,
+ kw_only: bool = ...,
+ eq: _EqOrderType | None = ...,
+ order: _EqOrderType | None = ...,
+ on_setattr: _OnSetAttrArgType | None = ...,
+ alias: str | None = ...,
+) -> _T: ...
+
+# This form covers type=non-Type: e.g. forward references (str), Any
+@overload
+def attrib(
+ default: _T | None = ...,
+ validator: _ValidatorArgType[_T] | None = ...,
+ repr: _ReprArgType = ...,
+ cmp: _EqOrderType | None = ...,
+ hash: bool | None = ...,
+ init: bool = ...,
+ metadata: Mapping[Any, Any] | None = ...,
+ type: object = ...,
+ converter: _ConverterType
+ | list[_ConverterType]
+ | tuple[_ConverterType]
+ | None = ...,
+ factory: Callable[[], _T] | None = ...,
+ kw_only: bool = ...,
+ eq: _EqOrderType | None = ...,
+ order: _EqOrderType | None = ...,
+ on_setattr: _OnSetAttrArgType | None = ...,
+ alias: str | None = ...,
+) -> Any: ...
+@overload
+@dataclass_transform(order_default=True, field_specifiers=(attrib, field))
+def attrs(
+ maybe_cls: _C,
+ these: dict[str, Any] | None = ...,
+ repr_ns: str | None = ...,
+ repr: bool = ...,
+ cmp: _EqOrderType | None = ...,
+ hash: bool | None = ...,
+ init: bool = ...,
+ slots: bool = ...,
+ frozen: bool = ...,
+ weakref_slot: bool = ...,
+ str: bool = ...,
+ auto_attribs: bool = ...,
+ kw_only: bool = ...,
+ cache_hash: bool = ...,
+ auto_exc: bool = ...,
+ eq: _EqOrderType | None = ...,
+ order: _EqOrderType | None = ...,
+ auto_detect: bool = ...,
+ collect_by_mro: bool = ...,
+ getstate_setstate: bool | None = ...,
+ on_setattr: _OnSetAttrArgType | None = ...,
+ field_transformer: _FieldTransformer | None = ...,
+ match_args: bool = ...,
+ unsafe_hash: bool | None = ...,
+) -> _C: ...
+@overload
+@dataclass_transform(order_default=True, field_specifiers=(attrib, field))
+def attrs(
+ maybe_cls: None = ...,
+ these: dict[str, Any] | None = ...,
+ repr_ns: str | None = ...,
+ repr: bool = ...,
+ cmp: _EqOrderType | None = ...,
+ hash: bool | None = ...,
+ init: bool = ...,
+ slots: bool = ...,
+ frozen: bool = ...,
+ weakref_slot: bool = ...,
+ str: bool = ...,
+ auto_attribs: bool = ...,
+ kw_only: bool = ...,
+ cache_hash: bool = ...,
+ auto_exc: bool = ...,
+ eq: _EqOrderType | None = ...,
+ order: _EqOrderType | None = ...,
+ auto_detect: bool = ...,
+ collect_by_mro: bool = ...,
+ getstate_setstate: bool | None = ...,
+ on_setattr: _OnSetAttrArgType | None = ...,
+ field_transformer: _FieldTransformer | None = ...,
+ match_args: bool = ...,
+ unsafe_hash: bool | None = ...,
+) -> 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: _A,
+ globalns: dict[str, Any] | None = ...,
+ localns: dict[str, Any] | None = ...,
+ attribs: list[Attribute[Any]] | None = ...,
+ 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',
+# [attr.ib()])` is valid
+def make_class(
+ name: str,
+ attrs: list[str] | tuple[str, ...] | dict[str, Any],
+ bases: tuple[type, ...] = ...,
+ class_body: dict[str, Any] | None = ...,
+ repr_ns: str | None = ...,
+ repr: bool = ...,
+ cmp: _EqOrderType | None = ...,
+ hash: bool | None = ...,
+ init: bool = ...,
+ slots: bool = ...,
+ frozen: bool = ...,
+ weakref_slot: bool = ...,
+ str: bool = ...,
+ auto_attribs: bool = ...,
+ kw_only: bool = ...,
+ cache_hash: bool = ...,
+ auto_exc: bool = ...,
+ eq: _EqOrderType | None = ...,
+ order: _EqOrderType | None = ...,
+ collect_by_mro: bool = ...,
+ on_setattr: _OnSetAttrArgType | None = ...,
+ field_transformer: _FieldTransformer | None = ...,
+) -> type: ...
+
+# _funcs --
+
+# TODO: add support for returning TypedDict from the mypy plugin
+# FIXME: asdict/astuple do not honor their factory args. Waiting on one of
+# these:
+# https://github.com/python/mypy/issues/4236
+# https://github.com/python/typing/issues/253
+# XXX: remember to fix attrs.asdict/astuple too!
+def asdict(
+ inst: AttrsInstance,
+ recurse: bool = ...,
+ filter: _FilterType[Any] | None = ...,
+ dict_factory: type[Mapping[Any, Any]] = ...,
+ retain_collection_types: bool = ...,
+ value_serializer: Callable[[type, Attribute[Any], Any], Any] | None = ...,
+ tuple_keys: bool | None = ...,
+) -> dict[str, Any]: ...
+
+# TODO: add support for returning NamedTuple from the mypy plugin
+def astuple(
+ inst: AttrsInstance,
+ recurse: bool = ...,
+ filter: _FilterType[Any] | None = ...,
+ tuple_factory: type[Sequence[Any]] = ...,
+ retain_collection_types: bool = ...,
+) -> tuple[Any, ...]: ...
+def has(cls: type) -> TypeGuard[type[AttrsInstance]]: ...
+def assoc(inst: _T, **changes: Any) -> _T: ...
+def evolve(inst: _T, **changes: Any) -> _T: ...
+
+# _config --
+
+def set_run_validators(run: bool) -> None: ...
+def get_run_validators() -> bool: ...
+
+# aliases --
+
+s = attributes = attrs
+ib = attr = attrib
+dataclass = attrs # Technically, partial(attrs, auto_attribs=True) ;)