AlenkaF commented on code in PR #47313:
URL: https://github.com/apache/arrow/pull/47313#discussion_r2272533883
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ci/docker/linux-apt-python-313-freethreading.dockerfile:
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@@ -32,13 +32,18 @@ COPY python/requirements-build.txt \
ENV ARROW_PYTHON_VENV /arrow-dev
RUN python3.13t -m venv ${ARROW_PYTHON_VENV}
+
+# Free-threaded CPython 3.13 needs pinned cffi version
+RUN sed '/^cffi/d' /arrow/python/requirements-test.txt >
/arrow/python/requirements-patched.txt && \
+ echo "cffi<2.0.0" >> /arrow/python/requirements-patched.txt
Review Comment:
Unfortunately, `python_version` doesn't support detailed versions like
`3.13t` — it only handles the `major.minor` format:
```
Ignoring cffi: markers 'python_version == "3.13t"' don't match your
environment
```
See:
https://github.com/ursacomputing/crossbow/actions/runs/16930331373/job/47974180274#step:6:722
Other markers listed in [PEP
508](https://peps.python.org/pep-0508/#environment-markers) don't help either.
Using something like `os.environ.get("PYTHON_GIL")` in a requirements file
is also ignored by pip, since arbitrary Python expressions aren’t supported in
markers.
Not sure about other options — will keep investigating.
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