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import enum import sys from typing import ( Any, Callable, Dict, Generic, List, Mapping, Optional, Protocol, Sequence, Tuple, Type, TypeVar, Union, 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 if sys.version_info >= (3, 10): from typing import TypeGuard else: from typing_extensions import TypeGuard 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) _EqOrderType = Union[bool, Callable[[Any], Any]] _ValidatorType = Callable[[Any, "Attribute[_T]", _T], Any] _ConverterType = Callable[[Any], Any] _FilterType = Callable[["Attribute[_T]", _T], bool] _ReprType = Callable[[Any], str] _ReprArgType = Union[bool, _ReprType] _OnSetAttrType = Callable[[Any, "Attribute[Any]", Any], Any] _OnSetAttrArgType = Union[ _OnSetAttrType, List[_OnSetAttrType], setters._NoOpType ] _FieldTransformer = Callable[ [type, List["Attribute[Any]"]], List["Attribute[Any]"] ] # FIXME: in reality, if multiple validators are passed they must be in a list # or tuple, but those are invariant and so would prevent subtypes of # _ValidatorType from working when passed in a list or tuple. _ValidatorArgType = Union[_ValidatorType[_T], Sequence[_ValidatorType[_T]]] # 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 # 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. if sys.version_info >= (3, 8): from typing import Literal @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: ... else: @overload def Factory(factory: Callable[[], _T]) -> _T: ... @overload def Factory( factory: Union[Callable[[Any], _T], Callable[[], _T]], takes_self: bool = ..., ) -> _T: ... class Attribute(Generic[_T]): name: str default: Optional[_T] validator: Optional[_ValidatorType[_T]] repr: _ReprArgType cmp: _EqOrderType eq: _EqOrderType order: _EqOrderType hash: Optional[bool] init: bool converter: Optional[_ConverterType] metadata: Dict[Any, Any] type: Optional[Type[_T]] kw_only: bool on_setattr: _OnSetAttrType alias: Optional[str] 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: Optional[_EqOrderType] = ..., hash: Optional[bool] = ..., init: bool = ..., metadata: Optional[Mapping[Any, Any]] = ..., type: None = ..., converter: None = ..., factory: None = ..., kw_only: bool = ..., eq: Optional[_EqOrderType] = ..., order: Optional[_EqOrderType] = ..., on_setattr: Optional[_OnSetAttrArgType] = ..., alias: Optional[str] = ..., ) -> Any: ... # This form catches an explicit None or no default and infers the type from the # other arguments. @overload def attrib( default: None = ..., validator: Optional[_ValidatorArgType[_T]] = ..., repr: _ReprArgType = ..., cmp: Optional[_EqOrderType] = ..., hash: Optional[bool] = ..., init: bool = ..., metadata: Optional[Mapping[Any, Any]] = ..., type: Optional[Type[_T]] = ..., converter: Optional[_ConverterType] = ..., factory: Optional[Callable[[], _T]] = ..., kw_only: bool = ..., eq: Optional[_EqOrderType] = ..., order: Optional[_EqOrderType] = ..., on_setattr: Optional[_OnSetAttrArgType] = ..., alias: Optional[str] = ..., ) -> _T: ... # This form catches an explicit default argument. @overload def attrib( default: _T, validator: Optional[_ValidatorArgType[_T]] = ..., repr: _ReprArgType = ..., cmp: Optional[_EqOrderType] = ..., hash: Optional[bool] = ..., init: bool = ..., metadata: Optional[Mapping[Any, Any]] = ..., type: Optional[Type[_T]] = ..., converter: Optional[_ConverterType] = ..., factory: Optional[Callable[[], _T]] = ..., kw_only: bool = ..., eq: Optional[_EqOrderType] = ..., order: Optional[_EqOrderType] = ..., on_setattr: Optional[_OnSetAttrArgType] = ..., alias: Optional[str] = ..., ) -> _T: ... # This form covers type=non-Type: e.g. forward references (str), Any @overload def attrib( default: Optional[_T] = ..., validator: Optional[_ValidatorArgType[_T]] = ..., repr: _ReprArgType = ..., cmp: Optional[_EqOrderType] = ..., hash: Optional[bool] = ..., init: bool = ..., metadata: Optional[Mapping[Any, Any]] = ..., type: object = ..., converter: Optional[_ConverterType] = ..., factory: Optional[Callable[[], _T]] = ..., kw_only: bool = ..., eq: Optional[_EqOrderType] = ..., order: Optional[_EqOrderType] = ..., on_setattr: Optional[_OnSetAttrArgType] = ..., alias: Optional[str] = ..., ) -> Any: ... @overload def field( *, default: None = ..., validator: None = ..., repr: _ReprArgType = ..., hash: Optional[bool] = ..., init: bool = ..., metadata: Optional[Mapping[Any, Any]] = ..., converter: None = ..., factory: None = ..., kw_only: bool = ..., eq: Optional[bool] = ..., 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 # other arguments. @overload def field( *, default: None = ..., validator: Optional[_ValidatorArgType[_T]] = ..., repr: _ReprArgType = ..., hash: Optional[bool] = ..., init: bool = ..., metadata: Optional[Mapping[Any, Any]] = ..., converter: Optional[_ConverterType] = ..., factory: Optional[Callable[[], _T]] = ..., kw_only: bool = ..., eq: Optional[_EqOrderType] = ..., order: Optional[_EqOrderType] = ..., on_setattr: Optional[_OnSetAttrArgType] = ..., alias: Optional[str] = ..., type: Optional[type] = ..., ) -> _T: ... # This form catches an explicit default argument. @overload def field( *, default: _T, validator: Optional[_ValidatorArgType[_T]] = ..., repr: _ReprArgType = ..., hash: Optional[bool] = ..., init: bool = ..., metadata: Optional[Mapping[Any, Any]] = ..., converter: Optional[_ConverterType] = ..., factory: Optional[Callable[[], _T]] = ..., kw_only: bool = ..., eq: Optional[_EqOrderType] = ..., 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 @overload def field( *, default: Optional[_T] = ..., validator: Optional[_ValidatorArgType[_T]] = ..., repr: _ReprArgType = ..., hash: Optional[bool] = ..., init: bool = ..., metadata: Optional[Mapping[Any, Any]] = ..., converter: Optional[_ConverterType] = ..., factory: Optional[Callable[[], _T]] = ..., kw_only: bool = ..., eq: Optional[_EqOrderType] = ..., order: Optional[_EqOrderType] = ..., on_setattr: Optional[_OnSetAttrArgType] = ..., alias: Optional[str] = ..., type: Optional[type] = ..., ) -> Any: ... @overload @dataclass_transform(order_default=True, field_specifiers=(attrib, field)) def attrs( maybe_cls: _C, these: Optional[Dict[str, Any]] = ..., repr_ns: Optional[str] = ..., repr: bool = ..., cmp: Optional[_EqOrderType] = ..., 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[_EqOrderType] = ..., order: Optional[_EqOrderType] = ..., auto_detect: bool = ..., collect_by_mro: bool = ..., getstate_setstate: Optional[bool] = ..., on_setattr: Optional[_OnSetAttrArgType] = ..., field_transformer: Optional[_FieldTransformer] = ..., match_args: bool = ..., unsafe_hash: Optional[bool] = ..., ) -> _C: ... @overload @dataclass_transform(order_default=True, field_specifiers=(attrib, field)) def attrs( maybe_cls: None = ..., these: Optional[Dict[str, Any]] = ..., repr_ns: Optional[str] = ..., repr: bool = ..., cmp: Optional[_EqOrderType] = ..., 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[_EqOrderType] = ..., order: Optional[_EqOrderType] = ..., auto_detect: bool = ..., collect_by_mro: bool = ..., getstate_setstate: Optional[bool] = ..., on_setattr: Optional[_OnSetAttrArgType] = ..., field_transformer: Optional[_FieldTransformer] = ..., match_args: bool = ..., unsafe_hash: Optional[bool] = ..., ) -> Callable[[_C], _C]: ... @overload @dataclass_transform(field_specifiers=(attrib, field)) def define( 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(field_specifiers=(attrib, field)) def define( 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]: ... mutable = define @overload @dataclass_transform(frozen_default=True, field_specifiers=(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_specifiers=(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: _A, globalns: Optional[Dict[str, Any]] = ..., localns: Optional[Dict[str, Any]] = ..., attribs: Optional[List[Attribute[Any]]] = ..., 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: Union[List[str], Tuple[str, ...], Dict[str, Any]], bases: Tuple[type, ...] = ..., class_body: Optional[Dict[str, Any]] = ..., repr_ns: Optional[str] = ..., repr: bool = ..., cmp: Optional[_EqOrderType] = ..., 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[_EqOrderType] = ..., order: Optional[_EqOrderType] = ..., collect_by_mro: bool = ..., on_setattr: Optional[_OnSetAttrArgType] = ..., field_transformer: Optional[_FieldTransformer] = ..., ) -> 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: Optional[_FilterType[Any]] = ..., dict_factory: Type[Mapping[Any, Any]] = ..., retain_collection_types: bool = ..., value_serializer: Optional[ Callable[[type, Attribute[Any], Any], Any] ] = ..., tuple_keys: Optional[bool] = ..., ) -> Dict[str, Any]: ... # TODO: add support for returning NamedTuple from the mypy plugin def astuple( inst: AttrsInstance, recurse: bool = ..., filter: Optional[_FilterType[Any]] = ..., 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) ;)