Python 3.12 Readiness tracker

[miketheman]

Python 3.12 is going to have a release candidate soon, so we might as well test it out.
https://peps.python.org/pep-0693/

Apply a patch locally to test it out yourself.

diff --git a/Dockerfile b/Dockerfile
index 0dd6db183..0ccc54548 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -36,7 +36,7 @@ RUN NODE_ENV=production npm run build


 # We'll build a light-weight layer along the way with just docs stuff
-FROM python:3.11.5-slim-bookworm as docs
+FROM python:3.12-rc-slim-bookworm as docs

 # By default, Docker has special steps to avoid keeping APT caches in the layers, which
 # is good, but in our case, we're going to mount a special cache volume (kept between
@@ -105,7 +105,7 @@ USER docs

 # Now we're going to build our actual application, but not the actual production
 # image that it gets deployed into.
-FROM python:3.11.5-slim-bookworm as build
+FROM python:3.12-rc-slim-bookworm as build

 # Define whether we're building a production or a development image. This will
 # generally be used to control whether or not we install our development and
@@ -184,7 +184,7 @@ RUN --mount=type=cache,target=/root/.cache/pip \

 # Now we're going to build our actual application image, which will eventually
 # pull in the static files that were built above.
-FROM python:3.11.5-slim-bookworm
+FROM python:3.12-rc-slim-bookworm

 # Setup some basic environment variables that are ~never going to change.
 ENV PYTHONUNBUFFERED 1

Notables:

• need orjson to release a 3.12 wheel, or we end up installing gcc/rust toolchains in build phase. They've already begun testing.
  Released in 3.8.10 and we're already up to 3.9.1
• need lxml to release 4.9.3 with 3.12 support - lxml/lxml@da0c433
• forcediphttpsadapter - Resolve DeprecationWarning: distutils Roadmaster/forcediphttpsadapter#14
• need grpcio to add 3.12 support - Python 3.12 Support grpc/grpc#33063 - [Python 3.12] Support Python 3.12 grpc/grpc#34398
• greenlet
  • add 3.12 support - Fix #323: Support Python 3.12 python-greenlet/greenlet#327
  • Release version 3.0.0 that includes 3.12 support, or wait until SQLAlchemy 2.1 makes it more optional. If they do, we should update our main.in to remove [asyncio] extras, since we don't use asyncio
• need venusian to release a new version that doesn't use find_module Please release 3.1.1 / 3.2.0 Pylons/venusian#85
• passlib is using pkg_resources - https://foss.heptapod.net/python-libs/passlib/-/issues/185 (and may be unmaintained?) Not a blocker, but opened a tracking issue for this.
• update kombu to 5.3.2 or newer - Python3.12: fix imports in kombu/utils/objects.py celery/kombu#1756 Last time we tried, had a rough time, so might need to revisit once this is solved. Also now seeing Kombu may rely on locking in functools.cached_property that will be removed in Python 3.12 celery/kombu#1668

As of 2023-09-29, these packages are being built into wheels:

grpcio,
hiredis,
paginate,
psycopg-c,
pycurl,
pyqrcode,
zxcvbn,
psutil,
pyyaml,
restructuredtext-lint

I expect psycopg-c to always be built, since that's what we've opted into with this package, but the others should probably get built as wheels soon.