Conflicting statements in docs about default support for asyncio subprocesses on Windows

[rob4226]

BPO	45896
Nosy	@asvetlov, @1st1, @miss-islington, @rob4226
PRs	bpo-45896: Fix docs default asyncio event loop on Windows #29857 [3.10] bpo-45896: Fix docs default asyncio event loop on Windows (GH-29857) #29877 [3.9] bpo-45896: Fix docs default asyncio event loop on Windows (GH-29857) #29878

^{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 2021-12-01.15:44:36.733>
created_at = <Date 2021-11-24.22:15:22.430>
labels = ['3.11', 'type-bug', '3.9', '3.10', 'docs']
title = 'Conflicting statements in docs about default support for asyncio subprocesses on Windows'
updated_at = <Date 2021-12-01.15:44:36.733>
user = 'https://github.com/rob4226'

bugs.python.org fields:

activity = <Date 2021-12-01.15:44:36.733>
actor = 'asvetlov'
assignee = 'docs@python'
closed = True
closed_date = <Date 2021-12-01.15:44:36.733>
closer = 'asvetlov'
components = ['Documentation']
creation = <Date 2021-11-24.22:15:22.430>
creator = 'Rob4226'
dependencies = []
files = []
hgrepos = []
issue_num = 45896
keywords = ['patch']
message_count = 6.0
messages = ['406967', '406975', '406976', '407449', '407460', '407462']
nosy_count = 5.0
nosy_names = ['asvetlov', 'docs@python', 'yselivanov', 'miss-islington', 'Rob4226']
pr_nums = ['29857', '29877', '29878']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue45896'
versions = ['Python 3.9', 'Python 3.10', 'Python 3.11']

[rob4226]

Hi,

In the docs for the asyncio event loop, it has a note on page:
https://docs.python.org/3/library/asyncio-eventloop.html#running-subprocesses

"Note The default asyncio event loop on Windows does not support subprocesses. See Subprocess Support on Windows for details."

Then following the link in that note to:
https://docs.python.org/3/library/asyncio-platforms.html#subprocess-support-on-windows
Says:
"On Windows, the default event loop ProactorEventLoop supports subprocesses, whereas SelectorEventLoop does not."

So the issue is, there are conflicting statements about default support for asyncio subprocesses on Windows. It seems the first statement listed above, is wrong or outdated since the default event loop on Windows is the ProactorEventLoop which does support subprocesses.

Thank you!

[asvetlov]

You are correct, the first statement is outdated.

Please feel free to make a pull request.

[rob4226]

Ok will do. Thanks for confirming.

[asvetlov]

New changeset f27bef3 by Rob in branch 'main':
bpo-45896: Fix docs default asyncio event loop on Windows (GH-29857)
f27bef3

[asvetlov]

New changeset 4203a5d by Miss Islington (bot) in branch '3.9':
bpo-45896: Fix docs default asyncio event loop on Windows (GH-29857) (GH-29878)
4203a5d

[asvetlov]

New changeset e99c5e0 by Miss Islington (bot) in branch '3.10':
bpo-45896: Fix docs default asyncio event loop on Windows (GH-29857) (GH-29877)
e99c5e0