Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/anyio/abc/_resources.py: 82%

1from abc import ABCMeta, abstractmethod 

2from types import TracebackType 

3from typing import Optional, Type, TypeVar 

4 

5T = TypeVar("T") 

6 

7 

8class AsyncResource(metaclass=ABCMeta): 

9 """ 

10 Abstract base class for all closeable asynchronous resources. 

11 

12 Works as an asynchronous context manager which returns the instance itself on enter, and calls 

13 :meth:`aclose` on exit. 

14 """ 

15 

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

17 return self 

18 

19 async def __aexit__( 

20 self, 

21 exc_type: Optional[Type[BaseException]], 

22 exc_val: Optional[BaseException], 

23 exc_tb: Optional[TracebackType], 

24 ) -> None: 

25 await self.aclose() 

26 

27 @abstractmethod 

28 async def aclose(self) -> None: 

29 """Close the resource."""