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import sys
from collections.abc import Callable, Iterator, Mapping
from typing import Any, ClassVar, Generic, TypeVar, final, overload
from typing_extensions import ParamSpec
if sys.version_info >= (3, 9):
from types import GenericAlias
_T = TypeVar("_T")
_D = TypeVar("_D")
_P = ParamSpec("_P")
@final
class ContextVar(Generic[_T]):
@overload
def __init__(self, name: str) -> None: ...
@overload
def __init__(self, name: str, *, default: _T) -> None: ...
def __hash__(self) -> int: ...
@property
def name(self) -> str: ...
@overload
def get(self) -> _T: ...
@overload
def get(self, default: _T, /) -> _T: ...
@overload
def get(self, default: _D, /) -> _D | _T: ...
def set(self, value: _T, /) -> Token[_T]: ...
def reset(self, token: Token[_T], /) -> None: ...
if sys.version_info >= (3, 9):
def __class_getitem__(cls, item: Any, /) -> GenericAlias: ...
@final
class Token(Generic[_T]):
@property
def var(self) -> ContextVar[_T]: ...
@property
def old_value(self) -> Any: ... # returns either _T or MISSING, but that's hard to express
MISSING: ClassVar[object]
if sys.version_info >= (3, 9):
def __class_getitem__(cls, item: Any, /) -> GenericAlias: ...
def copy_context() -> Context: ...
# It doesn't make sense to make this generic, because for most Contexts each ContextVar will have
# a different value.
@final
class Context(Mapping[ContextVar[Any], Any]):
def __init__(self) -> None: ...
@overload
def get(self, key: ContextVar[_T], default: None = None, /) -> _T | None: ...
@overload
def get(self, key: ContextVar[_T], default: _T, /) -> _T: ...
@overload
def get(self, key: ContextVar[_T], default: _D, /) -> _T | _D: ...
def run(self, callable: Callable[_P, _T], *args: _P.args, **kwargs: _P.kwargs) -> _T: ...
def copy(self) -> Context: ...
def __getitem__(self, key: ContextVar[_T], /) -> _T: ...
def __iter__(self) -> Iterator[ContextVar[Any]]: ...
def __len__(self) -> int: ...
def __eq__(self, value: object, /) -> bool: ...
|
