feat: Adds Python 3.13 support #319

chalmerlowe · 2025-10-22T17:56:08Z

This PR introduces support for Python 3.13 and makes several updates to the CI and testing configuration:

Python 3.13 Support:

Adds Python 3.13 to the classifiers in setup.py.
A constraints-3.13.txt file was already present.

CI/Testing Updates:

Updates the default Python version for linting in .github/workflows/lint.yml from 3.8 to 3.10 to mirror other defaults in the nox sessions for system tests, etc.
Sets the NOX_SESSION environment variable in .kokoro/presubmit/presubmit.cfg to "system blacken format" to control which nox sessions run during presubmit
Changes DEFAULT_PYTHON_VERSION in noxfile.py from 3.8 to 3.10.
Updates SYSTEM_TEST_PYTHON_VERSIONS in noxfile.py from 3.8 to 3.10.

Owlbot Configuration:

Adds s.replace calls in owlbot.py to persist the changes in lint.yml, presubmit.cfg, and noxfile.py after owlbot post-processing. This ensures that the CI environment and test configurations use Python 3.10 by default and that the presubmit runs a specific set of nox sessions.

These changes ensure that Python 3.13 is supported and that the CI environment defaults to Python 3.10 for system tests and linting, working around known issues with older Python versions (3.7 and 3.8) in the Kokoro Docker python-multi image.

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

setup.py

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

.kokoro/presubmit/presubmit.cfg

owlbot.py

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

owlbot.py

setup.py

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

…python-dns into feat/add-python-3.13

setup.py

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

…python-dns into feat/add-python-3.13

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

…python-dns into feat/add-python-3.13

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

…python-dns into feat/add-python-3.13

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

gkevinzheng · 2025-10-23T15:10:53Z

.kokoro/presubmit/presubmit.cfg

+
+env_vars: {
+    key: "NOX_SESSION"
+    value: "system blacken format"


Shouldn't this also have all the unit-<version> from 3.9 to 3.13?

@gkevinzheng

We are running unit tests in github actions so we do not need to duplicate those tests here in the kokoro session.

Our multi-python docker image does not have python 3.8 and 3.7 wheels due to an issue. We are able to run those unit tests under 3.7 and 3.8 in GitHub (as well as all the others up to 3.14) until we finally ditch 3.7 and 3.8 completely from all the split repos.

gkevinzheng · 2025-10-23T15:14:49Z

owlbot.py

+s.replace(
+    "noxfile.py",
+    'DEFAULT_PYTHON_VERSION = "3.8"',
+    'DEFAULT_PYTHON_VERSION = "3.10"'
+)
+
+s.replace(
+    "noxfile.py",
+    r'SYSTEM_TEST_PYTHON_VERSIONS: List\[str\] = \["3.8"\]',
+    'SYSTEM_TEST_PYTHON_VERSIONS: List[str] = ["3.10"]'
+)
+
+


This can all be done with the following additional parameters in the common.py_library call:

default_python_version="3.10", system_test_python_versions=["3.10"],

…brary

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

🤖 I have created a release *beep* *boop* --- ## [0.36.0](v0.35.1...v0.36.0) (2025-11-05) ### Features * Add support for Python 3.14 ([#321](#321)) ([99c0adb](99c0adb)) * Adds Python 3.13 support ([#319](#319)) ([ea851ce](ea851ce)) --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please). Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com> Co-authored-by: Anthonios Partheniou <partheniou@google.com>

🤖 I have created a release *beep* *boop* --- ## [0.36.0](googleapis/python-dns@v0.35.1...v0.36.0) (2025-11-05) ### Features * Add support for Python 3.14 ([#321](googleapis/python-dns#321)) ([99c0adb](googleapis/python-dns@99c0adb)) * Adds Python 3.13 support ([#319](googleapis/python-dns#319)) ([ea851ce](googleapis/python-dns@ea851ce)) --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please). Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com> Co-authored-by: Anthonios Partheniou <partheniou@google.com>

feat: Adds Python 3.13 support

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chalmerlowe requested a review from a team as a code owner October 22, 2025 17:56

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fix(kokoro): Preserve NOX_SESSION in presubmit.cfg

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Merge branch 'feat/add-python-3.13' of https://github.com/googleapis/…

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…python-dns into feat/add-python-3.13

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updates lint version to match default of 3.10

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updates system test version to match default of 3.10

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…python-dns into feat/add-python-3.13

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…python-dns into feat/add-python-3.13

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…python-dns into feat/add-python-3.13

updates lint version to match default of 3.10 redux

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chore(main): release 0.36.0 #320

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feat: Adds Python 3.13 support #319

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chalmerlowe commented Oct 22, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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Python 3.13 Support:

CI/Testing Updates:

Owlbot Configuration:

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