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CI: try free-threaded Python 3.14t (DRAFT — documenting failures) #15104

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CI: try free-threaded Python 3.14t (DRAFT — documenting failures) #15104

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d158e47
ci: switch default Python to free-threaded 3.14t
priya-sundaram-dev Aug 28, 2026
19702af
deps: bump pandas 2.2.3 -> 2.3.3 (first release with Python 3.14 + fr…
priya-sundaram-dev Aug 28, 2026
9f20d6a
ci(3.14t): gate opencv-python into optional 'cv' group + skip cv2 files
priya-sundaram-dev Aug 28, 2026
2725960
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Aug 28, 2026
87909f6
ci(3.14t): add --ignore-gil-enabled so sklearn/xgboost imports don't …
priya-sundaram-dev Aug 28, 2026
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18 changes: 16 additions & 2 deletions .github/workflows/build.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -17,14 +17,28 @@ jobs:
cache-dependency-glob: uv.lock
- uses: actions/setup-python@v7
with:
python-version-file: pyproject.toml
python-version: 3.14t

@cclauss cclauss Aug 28, 2026

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Let's make this change in all workflows that use actions/setup-python.

Suggested change
python-version: 3.14t
python-version-file: 'pyproject.toml'

This will make the diffs smaller in PRs like this one and:

allow-prereleases: true
- run: uv sync --group=test
- name: Run tests
# TODO: #8818 Re-enable quantum tests
# opencv-python is gated out on 3.14t (no cp314t wheel yet), so skip the
# files that import cv2. Pure-Python algorithms in computer_vision/ and
# data_compression/ still run; digital_image_processing/ is almost entirely
# cv2-based so it is skipped as a tree. Re-enable when a cp314t wheel ships.
# --ignore-gil-enabled: some compiled deps (sklearn, xgboost, ...) don't
# yet ship the Py_mod_gil slot, so importing them re-enables the GIL under
# 3.14t. That's an upstream-wheel gap, not our code; the flag lets the suite
# run anyway and pytest-run-parallel still reports which tests are not
# thread-safe. Drop the flag once the scientific stack ships free-threaded wheels.
run: uv run --with=pytest-run-parallel pytest
--iterations=8 --parallel-threads=auto
--iterations=8 --parallel-threads=auto --ignore-gil-enabled
--ignore=computer_vision/cnn_classification.py
--ignore=computer_vision/flip_augmentation.py
--ignore=computer_vision/harris_corner.py
--ignore=computer_vision/mosaic_augmentation.py
--ignore=data_compression/peak_signal_to_noise_ratio.py
--ignore=digital_image_processing/
--ignore=docs/conf.py
--ignore=dynamic_programming/k_means_clustering_tensorflow.py
--ignore=machine_learning/local_weighted_learning/local_weighted_learning.py
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2 changes: 1 addition & 1 deletion .github/workflows/directory_writer.yml
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Expand Up @@ -11,7 +11,7 @@ jobs:
fetch-depth: 0
- uses: actions/setup-python@v7
with:
python-version-file: pyproject.toml
python-version: 3.14t
allow-prereleases: true
- name: Write DIRECTORY.md
run: |
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4 changes: 2 additions & 2 deletions .github/workflows/project_euler.yml
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Expand Up @@ -25,7 +25,7 @@ jobs:
- uses: astral-sh/setup-uv@v7
- uses: actions/setup-python@v7
with:
python-version-file: pyproject.toml
python-version: 3.14t
allow-prereleases: true
- run: uv sync --group=euler-validate --group=test
- run: uv run pytest --doctest-modules --cov-report=term-missing:skip-covered --cov=project_euler/ project_euler/
Expand All @@ -43,7 +43,7 @@ jobs:
- uses: astral-sh/setup-uv@v7
- uses: actions/setup-python@v7
with:
python-version-file: pyproject.toml
python-version: 3.14t
allow-prereleases: true
- run: uv sync --group=euler-validate --group=test
- run: uv run pytest scripts/validate_solutions.py
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2 changes: 1 addition & 1 deletion .github/workflows/sphinx.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,7 @@ jobs:
- uses: astral-sh/setup-uv@v7
- uses: actions/setup-python@v7
with:
python-version-file: pyproject.toml
python-version: 3.14t
allow-prereleases: true
- run: uv sync --group=docs
- uses: actions/configure-pages@v6
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11 changes: 9 additions & 2 deletions pyproject.toml
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Expand Up @@ -18,8 +18,7 @@ dependencies = [
"lxml>=6",
"matplotlib>=3.9.3",
"numpy>=2.1.3",
"opencv-python>=4.10.0.84",
"pandas>=2.2.3",
"pandas>=2.3.3",
"pillow>=11.3",
"rich>=13.9.4",
"scikit-learn>=1.5.2",
Expand All @@ -42,6 +41,14 @@ docs = [
"sphinx-autoapi>=3.4",
"sphinx-pyproject>=0.3",
]
# opencv-python has no free-threaded (cp314t) wheel yet and fails to build from
# source under 3.14t (CMake), which blocks `uv sync` for every job. Keep it in an
# optional group so the free-threaded CI can install everything else and actually
# run pytest-run-parallel on the pure-Python algorithms. Re-fold into core deps
# once a cp314t wheel ships (upstream: opencv/opencv#27933).
cv = [
"opencv-python>=4.10.0.84",
]
euler-validate = [
"httpx>=0.28.1",
"numpy>=2.1.3",
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