conditional import scipy_fft

[vtavana]

In this PR, mkl_fft.interface is modified to only import scipy_fft if scipy is installed.

[Copilot]

Pull Request Overview

This PR makes the SciPy FFT interface optional by only importing scipy_fft when SciPy is installed, and adapts packaging, tests, and documentation accordingly.

• Introduce a new optional dependency group for SciPy in pyproject.toml and update test requirements.
• Conditionally import scipy_fft in the interface module.
• Modify tests to skip SciPy‐related tests when SciPy is absent and unify version checks.
• Update conda recipes and README to reflect the optional SciPy dependency.

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
pyproject.toml	Added scipy_interface extras, tightened test group to SciPy ≥1.10
mkl_fft/interfaces/init.py	Wrapped SciPy FFT import in a try/except
mkl_fft/tests/third_party/scipy/*.py	Added module-level skips, replaced hard imports and version checks
mkl_fft/tests/test_interfaces.py	Dynamic interface list and pytest.importorskip for SciPy tests
conda-recipe/meta.yaml	Updated SciPy test requirement to ≥1.10
conda-recipe-cf/meta.yaml	Updated SciPy test requirement to ≥1.10
README.md	Added optional SciPy install steps

Comments suppressed due to low confidence (3)

conda-recipe/meta.yaml:36

• Conda tests require SciPy >=1.10, but test_basic.py skips <1.12; update this to scipy >=1.12 for consistency.

-      - scipy >=1.10

conda-recipe-cf/meta.yaml:35

• Conda-CF tests require SciPy >=1.10, but other tests skip <1.12; consider bumping to scipy >=1.12.

-      - scipy >=1.10

README.md:96

• [nitpick] The README suggests installing SciPy without a version; consider specifying pip install scipy>=1.12 to match test requirements.

-  - `pip install scipy` (optional: for using `mkl_fft.interface.scipy_fft` module)

[ndgrigorian]

LGTM!