Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/anyio/abc/_resources.py: 83%

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, and calls 

15 :meth:`aclose` on exit. 

16 """ 

17 

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

19 return self 

20 

21 async def __aexit__( 

22 self, 

23 exc_type: type[BaseException] | None, 

24 exc_val: BaseException | None, 

25 exc_tb: TracebackType | None, 

26 ) -> None: 

27 await self.aclose() 

28 

29 @abstractmethod 

30 async def aclose(self) -> None: 

31 """Close the resource."""