feat(python): support N-D nk.scale - #376
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August 8, 2026 06:26
Accept shape-preserving HWC and NHWC buffers without flattening them in Python.
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Summary
nk.scaleto accept shape-preserving N-D buffers through the existing stride walker.out=, in-placeout=input, and strided HWC inputs.out=C-contiguous and same-dtype, consistent with the existing vector contract.Why
Callers can now scale images and batches directly, without flattening an input buffer and reshaping the result in Python. This is an API and readability improvement; it intentionally preserves the existing native kernel and has no performance claim.
Benchmark
Apple arm64, NumKong 7.8.0, NumPy 2.4.4, median of 151 interleaved samples:
(1080, 1920, 3)(1080, 1920, 3)out=(4, 512, 512, 3)(4, 512, 512, 3)out=Validation
PYTHONPATH=python python -m pytest test/test_each.py -q— 46,696 passed.Closes #327.