#3401 Bump Python version to 3.13 Pull request opened by ndonyapour Tracking issue Closes flyteorg/flyte#6993 Why are the changes needed? Python 3.13 was released in October 2024, and flytekit should support it. The previous

requires-python

constraint was

>=3.10,<3.13

, which explicitly excluded Python 3.13. Several issues needed to be addressed: 1. The

requires-python

constraint needed to be updated from

>=3.10,<3.13

to

>=3.10,<3.14

to allow Python 3.13 2. Python 3.13 was missing from the project classifiers in

pyproject.toml

3. The

PythonVersion

enum didn't include Python 3.13, causing

ValueError: (3, 13) is not a valid PythonVersion

errors when running tests 4. CI workflows didn't test Python 3.13 5. Plugin default images didn't support Python 3.13 6. Tests for tensorflow/pytorch were failing on Python 3.13 because these libraries don't support Python 3.12+ yet What changes were proposed in this pull request? Core Changes • pyproject.toml: • Updated

requires-python

from

">=3.10,<3.13"

to

">=3.10,<3.14"

to allow Python 3.13 • Added

"Programming Language :: Python :: 3.13"

to project classifiers • flytekit/configuration/default_images.py: • Added

PYTHON_3_13 = (3, 13)

to

PythonVersion

enum • Added Python 3.13 default image prefix:

"cr.flyte.org/flyteorg/flytekit:py3.13-"

Plugin Updates • plugins/flytekit-sqlalchemy/flytekitplugins/sqlalchemy/task.py: Added Python 3.13 to

SQLAlchemyDefaultImages._DEFAULT_IMAGE_PREFIXES

• plugins/flytekit-openai/flytekitplugins/openai/batch/task.py: Added Python 3.13 to

OpenAIBatchDefaultImages._DEFAULT_IMAGE_PREFIXES

Test Updates Added

pytest.importorskip()

and

pytestmark = pytest.mark.skipif(sys.version_info >= (3, 12), ...)

to skip tensorflow/pytorch tests on Python 3.12+: •

tests/flytekit/unit/extras/pytorch/test_checkpoint.py

•

tests/flytekit/unit/extras/pytorch/test_native.py

•

tests/flytekit/unit/extras/pytorch/test_transformations.py

•

tests/flytekit/unit/extras/tensorflow/record/test_transformations.py

•

tests/flytekit/unit/extras/tensorflow/record/test_record.py

•

tests/flytekit/unit/extras/tensorflow/model/test_model.py

•

tests/flytekit/unit/extras/tensorflow/model/test_transformations.py

These tests are automatically skipped on Python 3.12+ because tensorflow and pytorch don't support these Python versions yet. CI/CD Updates • .github/workflows/pythonbuild.yml: • Added Python 3.13 to scheduled test runs:

["3.10","3.11","3.12","3.13"]

• Updated extras test skip condition:

if: ${{ matrix.python-version != '3.12' && matrix.python-version != '3.13' }}

• Added Python 3.13 exclusions for incompatible plugins (airflow, mlflow, modin, vaex, ray, kf-pytorch, onnx-pytorch) • Added Python 3.13 exclusion for pandas<2.0.0 test matrix • .github/workflows/pythonpublish.yml: • Added Python 3.13 to Docker image build matrix:

["3.10","3.11","3.12","3.13"]

• .github/workflows/build_image.yml: • Already includes Python 3.13 (no changes needed) Documentation • dev-requirements.in: Updated comments to reflect that tensorflow/torch don't support Python 3.12+ yet How was this patch tested? Setup process 1. Created a Python 3.13 uv environment: uv venv --python 3.13 source .venv/bin/activate # or

.venv\Scripts\activate

on Windows 2. Installed dependencies and dev requirements: uv pip install -r dev-requirements.in

3. Verified Python 3.13 enum works correctly:
```bash
python -c "from flytekit.configuration.default_images import PythonVersion; print(PythonVersion((3, 13)))"
# Output: PythonVersion.PYTHON_3_13

1. Ran unit tests using make commands: make unit_test 2. Verified tensorflow/pytorch tests are properly skipped: make unit_test_extras Test Results • ✅ Python 3.13 enum correctly recognizes

(3, 13)

• ✅ Core unit tests pass on Python 3.13 • ✅ Tensorflow/pytorch tests are automatically skipped on Python 3.13 • ✅ CI workflows updated to test Python 3.13 in scheduled runs • ✅ Docker images will be built for Python 3.13 on releases Screenshots N/A (code changes only) Check all the applicable boxes • I updated the documentation accordingly. • All new and existing tests passed. • All commits are signed-off. Related PRs N/A Docs link N/A (no documentation changes required) --- Note: Some plugins are excluded from Python 3.13 CI runs due to dependency incompatibilities (documented in workflow exclusions). These will be re-enabled as dependencies add Python 3.13 support. flyteorg/flytekit