Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/anyio/abc/_resources.py: 85%

1from __future__ import annotations 

2 

3from abc import ABCMeta, abstractmethod 

4from types import TracebackType 

5from typing import TypeVar 

6 

7T = TypeVar("T") 

8 

9 

10class AsyncResource(metaclass=ABCMeta): 

11 """ 

12 Abstract base class for all closeable asynchronous resources. 

13 

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

15 and calls :meth:`aclose` on exit. 

16 """ 

17 

18 __slots__ = () 

19 

20 async def __aenter__(self: T) -> T: 

21 return self 

22 

23 async def __aexit__( 

24 self, 

25 exc_type: type[BaseException] | None, 

26 exc_val: BaseException | None, 

27 exc_tb: TracebackType | None, 

28 ) -> None: 

29 await self.aclose() 

30 

31 @abstractmethod 

32 async def aclose(self) -> None: 

33 """Close the resource."""