Cookbook: Using Layers

[ariG23498]

CC: @stevhliu @danieldk @sayakpaul

[github-actions]

Hi @ariG23498, thanks for your interest in contributing!

This project requires that pull request authors are vouched, and you are not in the list of vouched users.

This PR will be closed automatically. See https://github.com/huggingface/kernels/blob/main/CONTRIBUTING.md for more details.

[github-actions]

Coverage report — kernels/

Measured on: Python 3.10 / Torch 2.13.0.
Other CI configurations are not included in this number.
Hardware-gated code paths (ROCm/XPU/NPU/Darwin/Windows) are excluded or unreachable on the Linux+CUDA runner.

Total coverage: 87.5% — threshold: 80% — ✅

Per-file breakdown

Name	Stmts	Miss	Cover	Missing
src/kernels/__init__.py	14	0	100%
src/kernels/_system.py	6	1	83%	10
src/kernels/_versions.py	130	14	89%	53, 59-60, 63-64, 102, 165-170, 199, 219
src/kernels/archs.py	56	1	98%	94
src/kernels/backends.py	214	62	71%	42, 46, 50-53, 70, 92, 110, 119, 123, 127-129, 150, 159, 163, 167-169, 190, 201, 203, 210-213, 222, 226, 230-250, 258, 281-301
src/kernels/compat.py	9	1	89%	5
src/kernels/deps.py	70	1	99%	56
src/kernels/hf_hub.py	63	2	97%	21, 23
src/kernels/importer.py	44	5	89%	80, 84, 87, 101-102
src/kernels/install.py	21	7	67%	76-100
src/kernels/layer/__init__.py	6	0	100%
src/kernels/layer/_interval_tree.py	103	4	96%	23, 52, 147, 150
src/kernels/layer/device.py	48	14	71%	42, 47-49, 91, 96-98, 101, 149, 152, 155-157
src/kernels/layer/func.py	85	6	93%	90, 115, 191, 311, 338, 368
src/kernels/layer/globals.py	5	0	100%
src/kernels/layer/kernelize.py	82	8	90%	259, 297, 305-306, 312, 316, 332-334
src/kernels/layer/layer.py	309	22	93%	211, 258, 285, 416, 437, 444-447, 453-454, 556-557, 578, 586, 597, 637, 641, 654, 708, 738, 813
src/kernels/layer/mode.py	14	0	100%
src/kernels/layer/repos.py	144	42	71%	27, 33, 36-43, 63-64, 70, 73-76, 90, 94, 103-104, 110, 113-116, 123-124, 130, 133-136, 143-144, 150, 153-156, 163-164, 170, 173-176, 257
src/kernels/load.py	71	2	97%	338, 378
src/kernels/locking.py	89	64	28%	35-83, 91-98, 102-125, 137, 152-159, 165-175, 179-186
src/kernels/python_deps.py	58	6	90%	59-60, 64-65, 101, 104
src/kernels/resolver.py	158	1	99%	231
src/kernels/status.py	50	2	96%	25, 79
src/kernels/validate.py	88	5	94%	9, 100, 167, 190-191
src/kernels/variants.py	278	17	94%	65, 96, 117, 147, 256-257, 299-302, 304, 388-394, 400-406, 455-461
src/kernels/verify.py	127	6	95%	46, 202-204, 318-319
TOTAL	2342	293	87%

Updated by the Test kernels workflow on commit f23566c9afb8986d8479bc37f5f7199c28a06185.

[sayakpaul]

Since both @danieldk and I have extensively reviewed the content, requesting a review from @stevhliu and also to determine how to make it visible from our docs :)