kevinjqliu opened a new pull request, #3324:
URL: https://github.com/apache/iceberg-python/pull/3324
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# Rationale for this change
Closes #3322
**This is mostly autogenerated by Claude to test the feasibility of 3.14t**
Looks like there are still dependent libraries without 3.14t support (bodo /
ray / sql-postgres / hive-kerberos / datafusion)
Adds support for building and testing pyiceberg under free-threaded Python
(`3.14t`).
### Changes
**Cython extension (`decoder_fast.pyx`, `setup.py`, `pyproject.toml`)**
- Add `# cython: freethreading_compatible=True` directive to
`decoder_fast.pyx`
- Detect `Py_GIL_DISABLED` at build time and set `freethreading_compatible`
compiler directive in `setup.py`
- Bump Cython build requirement from `>=3.0.0` to `>=3.1.0` (required for
`freethreading_compatible`)
**Thread safety (`singleton.py`)**
- Add double-checked locking to the `Singleton` metaclass to prevent races
without the GIL
**Build system (`Makefile`)**
- Detect free-threaded Python via `PYTHON=3.14t` and automatically exclude
extras that lack free-threaded wheels (`bodo`, `ray`, `sql-postgres`,
`hive-kerberos`, `datafusion`)
- Skip corresponding test files (`test_datafusion.py`, `test_upsert.py`,
kerberos tests)
**CI workflows**
- Add `3.14t` to the `lint-and-unit-test` matrix in `python-ci.yml`
- Enable free-threaded wheel builds in `pypi-build-artifacts.yml` and
`svn-build-artifacts.yml` (`CIBW_FREE_THREADED_SUPPORT: "true"`, remove
`CIBW_SKIP: "cp3*t-*"`)
## Are these changes tested?
## Are there any user-facing changes?
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