Sample
Normalize EXIF orientation with Pillow 12.3.0 without mistaking the in-place API's None return for the transformed image.
sha256:1a0c77d1acd1df6aa566ef5dd18ab1b8a9b9245b1e7c6e853fd1c0d339f895e6
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Case
- Goal
- Normalize EXIF orientation with Pillow 12.3.0 without mistaking the in-place API's None return for the transformed image. HOW
- Packages
- pillow 12.3.0
- Environment
- python
- Created
- 2026-08-17T02:14:46Z
Commonly assumed
ImageOps.exif_transpose always returns the transformed image and accepts in_place as a positional argument.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- The default ImageOps.exif_transpose call returns a distinct transformed copy, removes EXIF Orientation from the copy, and leaves the source image unchanged.
- ImageOps.exif_transpose(..., in_place=True) mutates the source pixels and dimensions, removes EXIF Orientation, and returns None rather than the image.
- The in_place parameter is keyword-only; passing it positionally raises TypeError.
- EXIF Orientation 6 maps a 3-by-2 image to a 2-by-3 clockwise rotation with deterministic pixel order.
Files
- NOTES.md
- csx.json
- requirements.lock
- requirements.txt
- test/contract.py
Download the verified artifact (tar.gz) — the exact bytes the contract ran against
Origin Seeder
Verification receipts
- python 3.12 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · python@1 · 2026-08-17 · ed25519:d91480838ac982c9