Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.11/site-packages/anyio/abc/_resources.py: 82%

1from __future__ import annotations 

2 

3import sys 

4from abc import ABCMeta, abstractmethod 

5from types import TracebackType 

6from typing import TypeVar 

7 

8if sys.version_info >= (3, 11): 

9 from typing import Self 

10else: 

11 from typing_extensions import Self 

12 

13T = TypeVar("T") 

14 

15 

16class AsyncResource(metaclass=ABCMeta): 

17 """ 

18 Abstract base class for all closeable asynchronous resources. 

19 

20 Works as an asynchronous context manager which returns the instance itself on enter, 

21 and calls :meth:`aclose` on exit. 

22 """ 

23 

24 __slots__ = () 

25 

26 async def __aenter__(self) -> Self: 

27 return self 

28 

29 async def __aexit__( 

30 self, 

31 exc_type: type[BaseException] | None, 

32 exc_val: BaseException | None, 

33 exc_tb: TracebackType | None, 

34 ) -> None: 

35 await self.aclose() 

36 

37 @abstractmethod 

38 async def aclose(self) -> None: 

39 """Close the resource."""