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Support Python 3.14 #235

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@robinvandernoord robinvandernoord commented Oct 31, 2025

I've updated the required dependencies (pyo3 and serde-pyobject) to versions that support Python 3.14.
This caused a compilation error when building, which I've fixed in src/python_bindings/mod.rs by adding a type hint.
Furthermore, I've added 3.14 as a build target in the build_wheels.yml github workflow.

Running make test still failed on 4 tests:

FAILED tests/test_kernels.py::test_interface_torch - RuntimeError: torch.compile is not supported on Python 3.14+
FAILED tests/test_kernels.py::test_interface_numpy - ImportError: To use the kernels in `outlines_core.kernels.numpy`, `numba` must be installed. You can install it with `pip install numba`
FAILED tests/test_kernels.py::test_torch_correctness - RuntimeError: torch.compile is not supported on Python 3.14+
FAILED tests/test_kernels.py::test_numpy_correctness - ImportError: To use the kernels in `outlines_core.kernels.numpy`, `numba` must be installed. You can install it with `pip install numba`

This is due to numba not supporting 3.14 and torch only partially supporting it.

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robinvandernoord commented Oct 31, 2025

Installing latest numba via (uv) pip install git+https://github.com/numba/numba.git reduces the amount of errors to 2:

FAILED tests/test_kernels.py::test_interface_torch - RuntimeError: torch.compile is not supported on Python 3.14+
FAILED tests/test_kernels.py::test_torch_correctness - RuntimeError: torch.compile is not supported on Python 3.14+

This error is still raised on the latest main branch of torch: https://github.com/pytorch/pytorch/blob/main/torch/_dynamo/eval_frame.py#L1306

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