[issue44318] Asyncio classes missing __slots__

[Bluenix]

New submission from Bluenix <bluenixdev at gmail.com>:

Most of asyncio's classes are missing a __slots__ attribute - for example Lock, Event, Condition, Semaphore, BoundedSemaphore all from locks.py; or Future, FlowControlMixin, Queue, BaseSubprocessTransport from various other parts of asyncio.

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components: asyncio
messages: 395165
nosy: Bluenix2, asvetlov, yselivanov
priority: normal
severity: normal
status: open
title: Asyncio classes missing __slots__
versions: Python 3.10

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44318>
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