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`import X as X` is required to make these public from . import exceptions as exceptions from . import filters as filters from . import converters as converters from . import validators as validators from ._version_info import VersionInfo __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) _ValidatorType = Callable[[Any, Attribute[_T], _T], Any] _ConverterType = Callable[[Any], _T] _FilterType = Callable[[Attribute[_T], _T], bool] _ReprType = Callable[[Any], str] _ReprArgType = Union[bool, _ReprType] # 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]]] # _make -- NOTHING: object # 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: 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: bool eq: bool order: bool hash: Optional[bool] init: bool converter: Optional[_ConverterType[_T]] metadata: Dict[Any, Any] type: Optional[Type[_T]] kw_only: bool # 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=) -> 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[bool] = ..., hash: Optional[bool] = ..., init: bool = ..., metadata: Optional[Mapping[Any, Any]] = ..., type: None = ..., converter: None = ..., factory: None = ..., kw_only: bool = ..., eq: Optional[bool] = ..., order: Optional[bool] = ..., ) -> 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[bool] = ..., hash: Optional[bool] = ..., init: bool = ..., metadata: Optional[Mapping[Any, Any]] = ..., type: Optional[Type[_T]] = ..., converter: Optional[_ConverterType[_T]] = ..., factory: Optional[Callable[[], _T]] = ..., kw_only: bool = ..., eq: Optional[bool] = ..., order: Optional[bool] = ..., ) -> _T: ... # This form catches an explicit default argument. @overload def attrib( default: _T, validator: Optional[_ValidatorArgType[_T]] = ..., repr: _ReprArgType = ..., cmp: Optional[bool] = ..., hash: Optional[bool] = ..., init: bool = ..., metadata: Optional[Mapping[Any, Any]] = ..., type: Optional[Type[_T]] = ..., converter: Optional[_ConverterType[_T]] = ..., factory: Optional[Callable[[], _T]] = ..., kw_only: bool = ..., eq: Optional[bool] = ..., order: Optional[bool] = ..., ) -> _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[bool] = ..., hash: Optional[bool] = ..., init: bool = ..., metadata: Optional[Mapping[Any, Any]] = ..., type: object = ..., converter: Optional[_ConverterType[_T]] = ..., factory: Optional[Callable[[], _T]] = ..., kw_only: bool = ..., eq: Optional[bool] = ..., order: Optional[bool] = ..., ) -> Any: ... @overload def attrs( maybe_cls: _C, these: Optional[Dict[str, Any]] = ..., repr_ns: Optional[str] = ..., repr: bool = ..., cmp: 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] = ..., ) -> _C: ... @overload def attrs( maybe_cls: None = ..., these: Optional[Dict[str, Any]] = ..., repr_ns: Optional[str] = ..., repr: bool = ..., cmp: 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] = ..., ) -> Callable[[_C], _C]: ... # TODO: add support for returning NamedTuple from the mypy plugin class _Fields(Tuple[Attribute[Any], ...]): def __getattr__(self, name: str) -> Attribute[Any]: ... def fields(cls: type) -> _Fields: ... def fields_dict(cls: type) -> Dict[str, Attribute[Any]]: ... def validate(inst: Any) -> None: ... # 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, ...] = ..., repr_ns: Optional[str] = ..., repr: bool = ..., cmp: 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] = ..., ) -> 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 def asdict( inst: Any, recurse: bool = ..., filter: Optional[_FilterType[Any]] = ..., dict_factory: Type[Mapping[Any, Any]] = ..., retain_collection_types: bool = ..., ) -> Dict[str, Any]: ... # TODO: add support for returning NamedTuple from the mypy plugin def astuple( inst: Any, recurse: bool = ..., filter: Optional[_FilterType[Any]] = ..., tuple_factory: Type[Sequence[Any]] = ..., retain_collection_types: bool = ..., ) -> Tuple[Any, ...]: ... def has(cls: type) -> bool: ... 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) ;)