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