Switch to Python 3.12

Require Python 3.12 as the minimum version, update GitHub Actions
accordingly, and remove an old workaround for Python 3.10.

.github/workflows/ci.yaml

@@ -58,7 +58,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: "3.11"
+          python-version: "3.12"
 
       # This has to happen after installing Node modules because we run
       # eslint and it wants react to be already installed.  We therefore
@@ -89,7 +89,7 @@ jobs:
     strategy:
       matrix:
         python:
-          - "3.11"
+          - "3.12"
 
     steps:
       - uses: actions/checkout@v4
@@ -137,7 +137,7 @@ jobs:
 
       - uses: lsst-sqre/run-tox@v1
         with:
-          python-version: "3.11"
+          python-version: "3.12"
           tox-envs: "docs"
           cache-key-prefix: "docs"
 
@@ -172,7 +172,7 @@ jobs:
       - name: Check links
         uses: lsst-sqre/run-tox@v1
         with:
-          python-version: "3.11"
+          python-version: "3.12"
           tox-envs: "docs-linkcheck"
 
   build:

.github/workflows/dependencies.yaml

@@ -15,7 +15,7 @@ jobs:
 
       - uses: lsst-sqre/run-neophile@v1
         with:
-          python-version: "3.11"
+          python-version: "3.12"
           mode: pr
           types: pre-commit
           app-id: ${{ secrets.NEOPHILE_APP_ID }}

.github/workflows/periodic-ci.yaml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       matrix:
         python:
-          - "3.11"
+          - "3.12"
 
     steps:
       - uses: actions/checkout@v4
@@ -27,7 +27,7 @@ jobs:
       # how dependencies should later be updated.
       - uses: lsst-sqre/run-neophile@v1
         with:
-          python-version: "3.11"
+          python-version: "3.12"
           mode: update
 
       - name: Set up Node

pyproject.toml

@@ -14,12 +14,12 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Natural Language :: English",
     "Operating System :: POSIX",
     "Typing :: Typed",
 ]
-requires-python = ">=3.11"
+requires-python = ">=3.12"
 dependencies = []
 dynamic = ["version"]
 
@@ -114,6 +114,10 @@ filterwarnings = [
     # Google modules call a deprecated pkg_resources API.
     "ignore:pkg_resources is deprecated as an API:DeprecationWarning",
     "ignore:.*pkg_resources\\.declare_namespace:DeprecationWarning",
+    # Google modules use PyType_Spec in a deprecated way.
+    "ignore:Type google\\..*metaclass.* custom tp_new:DeprecationWarning",
+    # dateutil uses a deprecated datetime function.
+    "ignore:datetime.datetime.utcfromtimestamp:DeprecationWarning:dateutil.*",
     # Bug in kopf
     "ignore:.*require all values to be sortable:DeprecationWarning:kopf.*",
 ]

requirements/dev.txt

@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile with Python 3.11
+# This file is autogenerated by pip-compile with Python 3.12
 # by the following command:
 #
 #    pip-compile --allow-unsafe --generate-hashes --output-file=requirements/dev.txt requirements/dev.in

requirements/main.txt

@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile with Python 3.11
+# This file is autogenerated by pip-compile with Python 3.12
 # by the following command:
 #
 #    pip-compile --allow-unsafe --generate-hashes --output-file=requirements/main.txt requirements/main.in
@@ -99,10 +99,6 @@ anyio==4.2.0 \
     #   httpx
     #   starlette
     #   watchfiles
-async-timeout==4.0.3 \
-    --hash=sha256:4640d96be84d82d02ed59ea2b7105a0f7b33abe8703703cd0ab0bf87c427522f \
-    --hash=sha256:7405140ff1230c310e51dc27b3145b9092d659ce68ff733fb0cefe3ee42be028
-    # via asyncpg
 asyncpg==0.29.0 \
     --hash=sha256:0009a300cae37b8c525e5b449233d59cd9868fd35431abc470a3e364d2b85cb9 \
     --hash=sha256:000c996c53c04770798053e1730d34e30cb645ad95a63265aec82da9093d88e7 \

tests/support/kubernetes.py

@@ -184,11 +184,7 @@ async def assert_custom_resource_status_is(
     }
     transition_str = seen["status"]["create"]["lastTransitionTime"]
     assert transition_str.endswith("Z")
-
-    # Python 3.11 can parse the string as-is, but Python 3.10 and earlier
-    # doesn't like the Z.
-    transition = datetime.fromisoformat(transition_str.replace("Z", "+00:00"))
-
+    transition = datetime.fromisoformat(transition_str)
     now = current_datetime()
     assert now - timedelta(seconds=30) <= transition <= now