Add asyncio.BufferQueue

[lig]

BPO	40616
Nosy	@asvetlov, @1st1, @lig
PRs	bpo-40616: Add asyncio.BufferQueue #20071

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2020-09-14.14:16:00.974>
created_at = <Date 2020-05-13.16:50:03.289>
labels = ['expert-asyncio']
title = 'Add `asyncio.BufferQueue`'
updated_at = <Date 2020-09-14.14:16:00.973>
user = 'https://github.com/lig'

bugs.python.org fields:

activity = <Date 2020-09-14.14:16:00.973>
actor = 'lig'
assignee = 'none'
closed = True
closed_date = <Date 2020-09-14.14:16:00.974>
closer = 'lig'
components = ['asyncio']
creation = <Date 2020-05-13.16:50:03.289>
creator = 'lig'
dependencies = []
files = []
hgrepos = []
issue_num = 40616
keywords = []
message_count = 1.0
messages = ['368788']
nosy_count = 3.0
nosy_names = ['asvetlov', 'yselivanov', 'lig']
pr_nums = ['20071']
priority = 'normal'
resolution = None
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue40616'
versions = []

Linked PRs

• gh-84976: Add back UTC to datetime.__all__ #104920

[lig]

It looks handy to be able to leverage collections.deque ability to be sized it asyncio.Queue.

This could provide the ability to implement backpressure in the queue or just use it as a buffer in messaging systems.

The implementation provided in the linked PR.