feat: Python 3.12 #8811

jennifer-richards · 2025-04-17T18:15:25Z

Updates Python to 3.12. Fixes #7929.

Draft while WIP.

Outstanding issues:

Coverage is outrageously slow, currently disabled
- Context: the old version of coverage that we use (4.5.4, ca 2019) is falling back from its fast CTracer module to its very slow PyTracer when used on Python 3.12. It's not clear exactly why, but it's almost 3x slower.
- The situation may be better if we can update to a current version of coverage, but see Poor performance in Python 3.12 nedbat/coveragepy#1665 for more info.
Should at least skim major requirements to confirm actual Python 3.12 compatibility (tests do pass, aside from coverage issues)
Need to decide if we want to move from :latest to a versioned tag (e.g., :bookworm-py312) to avoid pulling the rug out from under users' dev environments

The test has been working, but in a broken way, for as long as it has existed. The smtpd-based test_smtpserver was masking an exception that did not interfere with the test's effectiveness.

Removed a few suppressions that were OBE based on running the tests and checking versions of the dependencies that were causing them. Reordered kwargs to make it more readable (to me anyway).

See the comment in settings.py for details. tl;dr coverage is unusably slow under python 3.12 as we're using it

# Conflicts: # dev/build/Dockerfile # dev/build/TARGET_BASE

# Conflicts: # dev/build/Dockerfile # dev/build/TARGET_BASE # ietf/doc/tests_review.py # ietf/review/mailarch.py

jennifer-richards and others added 16 commits April 16, 2025 17:46

refactor: smtpd -> aiosmtpd

ccce36d

test: set mock return value for EmailOnFailureCommandTests

025878a

The test has been working, but in a broken way, for as long as it has existed. The smtpd-based test_smtpserver was masking an exception that did not interfere with the test's effectiveness.

test: increase SMTP.line_length_limit

5bb3700

Merge branch 'main' into refactor-test-smtpserver

aae841b

chore: suppress known deprecation warnings

a0440de

refactor: utcfromtimestamp->fromtimestamp

00d35e0

refactor: it's now spelled "datetime.UTC"

94d291c

feat: python 3.12

17eb703

chore: suppress deprecation warning

b1466ab

fix: utcnow() -> now(datetime.UTC)

16daa76

chore: suppress deprecation warning

b43d2f8

chore: more deprecation warnings

2cc94a0

ci: update base image target version to 20250417T1507

3752410

chore: reorg / clean up deprecation ignore list

ebbd341

Removed a few suppressions that were OBE based on running the tests and checking versions of the dependencies that were causing them. Reordered kwargs to make it more readable (to me anyway).

chore: disable coverage test for now

41bf537

See the comment in settings.py for details. tl;dr coverage is unusably slow under python 3.12 as we're using it

Merge remote-tracking branch 'upstream/main' into feat/py312

fc151d8

# Conflicts: # dev/build/Dockerfile # dev/build/TARGET_BASE

jennifer-richards changed the base branch from main to feat/blobstage April 22, 2025 15:00

jennifer-richards changed the base branch from feat/blobstage to main April 22, 2025 15:00

jennifer-richards and others added 3 commits April 22, 2025 15:11

ci: update base image target version to 20250422T1458

0af6e1c

Merge branch 'main' into feat/py312

d541129

# Conflicts: # dev/build/Dockerfile # dev/build/TARGET_BASE # ietf/doc/tests_review.py # ietf/review/mailarch.py

ci: update base image target version to 20250604T2012

c77d76a

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jennifer-richards commented Apr 17, 2025 •

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