[issue38846] async: Return context manager from open(_unix)_connection

[Sebastian Rittau]

New submission from Sebastian Rittau <srittau at rittau.biz>:

As a convenience it would be useful if async.open_connection() and open_unix_connection() would return a context manager that closes the writer on exit:

    with await open_unix_connection(...) as (reader, writer):
        ...

This could be achieved by using a custom sub-class of tuple:

    class _ConnectionContext(tuple):
        def __enter__(self):
            return self
        def __exit__(self, *args):
            self[1].close()

I can submit a PR if wanted.

----------
components: asyncio
messages: 356962
nosy: asvetlov, srittau, yselivanov
priority: normal
severity: normal
status: open
title: async: Return context manager from open(_unix)_connection
versions: Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38846>
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