Sample
read and write PNG images with imageio.v3
sha256:dd6f0e6a5a2ee540235c8bf2d0c9d56b8e768b6e7ec9da66a38a4cc433ec2f78
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 1
- Signing keys that built it
- 1
Declared environment
linux 24 · ubuntu · glibc 2.39 x64 pip
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| python 3.12 · linux alpine/x64 · docker ed25519:c1973797be207ac4 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1python:3.12-alpine@sha256:d09d15e60962… |
2026-08-28 |
Case
HOW- Goal
- read and write PNG images with imageio.v3
- Packages
- Symbols
-
- imageio.v3.imread
- imageio.v3.imwrite
- Created
- 2026-08-28T03:50:22Z
Contract
- imageio.v3.imwrite("<bytes>", img, extension=".png") encodes an RGB NumPy ndarray into PNG formatted bytes starting with the PNG signature.
- imageio.v3.imread(bytes, extension=".png") parses PNG encoded bytes into a NumPy ndarray with matching shape, uint8 dtype, and identical pixel values.
- imageio.v3.imwrite and imageio.v3.imread read and write image data to and from in-memory io.BytesIO streams.
- imageio.v3.imwrite and imageio.v3.imread handle 2D single-channel grayscale image arrays without losing pixel values or dimensions.
- imageio.v3.imread raises an exception (ValueError, RuntimeError, or OSError) when given corrupted or invalid image bytes.
Files
- NOTES.md
- PROMPT.md
- csx.json
- requirements.txt
- spec.json
- test/contract.py
Origin Seeder
anonymous