AVRO-4232: [Python] Backport uv/ruff tooling to branch-1.12 - #3922
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RyanSkraba merged 2 commits intoAug 6, 2026
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Backports the Python tooling modernization (AVRO-4232, apache#3658) so that the Java interop workflow's 'uv sync --frozen' step works on branch-1.12. The workflow change was previously backported without the accompanying lang/py migration, leaving no uv.lock or [project] table, which caused 'uv sync --frozen' to fail. - Migrate lang/py from tox/setuptools to uv + ruff - Add uv.lock and [project]/[dependency-groups] to pyproject.toml - Remove tox.ini and setup.cfg - Update build.sh (ruff/coverage/mypy targets) - Convert test-lang-py.yml to uv (drops py3.9 CI, adds 3.14) - Exclude lang/py/uv.lock from RAT license check Version pinned to 1.12.2 and packages.find restricted to avro* to fix flat-layout package discovery.
uvx fetches the latest ruff, whose stricter default lint rules flag 252 pre-existing issues in the (not-yet-modernized) branch-1.12 source. Use 'uv run ruff' to run the version pinned in uv.lock (0.15.1), matching main and keeping lint reproducible.
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What
Backports the Python tooling modernization from AVRO-4232 (#3658) to
branch-1.12.Why
The Java interop workflow (
test-lang-java.yml) onbranch-1.12runsuv sync --frozeninlang/py, but that workflow change was previously backported without the accompanyinglang/pymigration. There was nouv.lockand no[project]table inpyproject.toml, souv sync --frozenfailed immediately and the workflow was red.Changes
lang/pyfrom tox/setuptools to uv + rufflang/py/uv.lockand[project]/[dependency-groups]topyproject.tomltox.iniandsetup.cfgbuild.sh(ruff / coverage / mypy targets)test-lang-py.ymlto uv (drops Python 3.9 from CI, adds 3.14 — matchesmain)lang/py/uv.lockfrom the RAT license check (pom.xml)branch-1.12 specifics
pyproject.tomlversion pinned to 1.12.2 (matchesshare/VERSION.txt)[tool.setuptools.packages.find] include = ["avro*"]to fix flat-layout "multiple top-level packages" discovery errorVerification (local)
uv sync --frozen✅ruff check/ruff format --diff✅mypy avro/— no issues ✅./build.sh coverage— 561 tests pass (1 skipped) ✅./build.sh interop-data-generate— produces null/deflate/bzip2/snappy/zstandard variants ✅Note
This drops Python 3.9 from CI (
requires-python = ">=3.10"), consistent withmain.