Building Python documentation with doctest logs a ResourceWarning in Doc/library/nntplib.rst

[vstinner]

BPO	45300
Nosy	@vstinner

^{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 = None
created_at = <Date 2021-09-27.13:29:57.191>
labels = ['3.11', 'docs']
title = 'Building Python documentation with doctest logs a ResourceWarning in Doc/library/nntplib.rst'
updated_at = <Date 2021-09-27.13:29:57.191>
user = 'https://github.com/vstinner'

bugs.python.org fields:

activity = <Date 2021-09-27.13:29:57.191>
actor = 'vstinner'
assignee = 'docs@python'
closed = False
closed_date = None
closer = None
components = ['Documentation']
creation = <Date 2021-09-27.13:29:57.191>
creator = 'vstinner'
dependencies = []
files = []
hgrepos = []
issue_num = 45300
keywords = []
message_count = 1.0
messages = ['402709']
nosy_count = 2.0
nosy_names = ['vstinner', 'docs@python']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue45300'
versions = ['Python 3.11']

[vstinner]

Build Python documentatioin with:

make -C Doc/ PYTHON=../python venv
LANG= PYTHONTRACEMALLOC=10 make -C Doc/ PYTHON=../python SPHINXOPTS="-q -W -j10" doctest 2>&1|tee log

See the logs:

/home/vstinner/python/main/Lib/socket.py:776: ResourceWarning: unclosed <socket.socket fd=9, family=AF_INET, type=SOCK_STREAM, proto=6, laddr=('192.168.1.6', 42216), raddr=('116.202.254.214', 119)>
self._sock = None
Object allocated at (most recent call last):
File "/home/vstinner/python/main/Doc/venv/lib/python3.11/site-packages/sphinx/builders/init.py", lineno 361
self.write(docnames, list(updated_docnames), method)
File "/home/vstinner/python/main/Doc/venv/lib/python3.11/site-packages/sphinx/ext/doctest.py", lineno 366
self.test_doc(docname, doctree)
File "/home/vstinner/python/main/Doc/venv/lib/python3.11/site-packages/sphinx/ext/doctest.py", lineno 470
self.test_group(group)
File "/home/vstinner/python/main/Doc/venv/lib/python3.11/site-packages/sphinx/ext/doctest.py", lineno 554
self.test_runner.run(test, out=self._warn_out, clear_globs=False)
File "/home/vstinner/python/main/Lib/doctest.py", lineno 1495
return self.__run(test, compileflags, out)
File "/home/vstinner/python/main/Lib/doctest.py", lineno 1348
exec(compile(example.source, filename, "single",
File "<doctest default[0]>", lineno 1
File "/home/vstinner/python/main/Lib/nntplib.py", lineno 334
self.sock = self._create_socket(timeout)
File "/home/vstinner/python/main/Lib/nntplib.py", lineno 399
return socket.create_connection((self.host, self.port), timeout)
File "/home/vstinner/python/main/Lib/socket.py", lineno 828
sock = socket(af, socktype, proto)

[hugovk]

Note the nntplib module is deprecated in 3.11 and set for removal in 3.13.

See PEP 594 – Removing dead batteries from the standard library and #91217.

[AA-Turner]

Closing per Hugo's comment.

A