[issue29679] Add @contextlib.asynccontextmanager

[Jelle Zijlstra]

Jelle Zijlstra added the comment:

Thanks, I'll address your PR comments.

issue 29302 is asking for AsyncExitStack, but that can be an independent change. I haven't personally felt the need for AsyncExitStack.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29679>
_______________________________________