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import enum import sys from typing import ( Any, Callable, Generic, 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 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) _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 # 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: ... 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: _ConverterType | Converter[Any, _T] | 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 | Converter[Any, _T] | 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 | Converter[Any, _T] | 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 | Converter[Any, _T] | 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) ;)
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