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Mini Shell
import sys
from typing import (
Any,
Callable,
Dict,
Generic,
List,
Mapping,
Optional,
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 ._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)
_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]]]
# _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.
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: ...
# Static type inference support via __dataclass_transform__ implemented as per:
# https://github.com/microsoft/pyright/blob/1.1.135/specs/dataclass_transforms.md
# This annotation must be applied to all overloads of "define" and "attrs"
#
# NOTE: This is a typing construct and does not exist at runtime. Extensions
# wrapping attrs decorators should declare a separate __dataclass_transform__
# signature in the extension module using the specification linked above to
# provide pyright support.
def __dataclass_transform__(
*,
eq_default: bool = True,
order_default: bool = False,
kw_only_default: bool = False,
field_descriptors: Tuple[Union[type, Callable[..., Any]], ...] = (()),
) -> Callable[[_T], _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
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] = ...,
) -> 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] = ...,
) -> _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] = ...,
) -> _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] = ...,
) -> 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] = ...,
) -> 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] = ...,
) -> _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] = ...,
) -> _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] = ...,
) -> Any: ...
@overload
@__dataclass_transform__(order_default=True, field_descriptors=(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] = ...,
) -> _C: ...
@overload
@__dataclass_transform__(order_default=True, field_descriptors=(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] = ...,
) -> Callable[[_C], _C]: ...
@overload
@__dataclass_transform__(field_descriptors=(attrib, field))
def define(
maybe_cls: _C,
*,
these: Optional[Dict[str, Any]] = ...,
repr: 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] = ...,
) -> _C: ...
@overload
@__dataclass_transform__(field_descriptors=(attrib, field))
def define(
maybe_cls: None = ...,
*,
these: Optional[Dict[str, Any]] = ...,
repr: 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] = ...,
) -> Callable[[_C], _C]: ...
mutable = define
frozen = define # they differ only in their defaults
# 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: ...
def resolve_types(
cls: _C,
globalns: Optional[Dict[str, Any]] = ...,
localns: Optional[Dict[str, Any]] = ...,
attribs: Optional[List[Attribute[Any]]] = ...,
) -> _C: ...
# 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[_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
def asdict(
inst: Any,
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]] = ...,
) -> 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) ;)
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