Sample
Parse wheel and sdist distribution filenames into canonical names, Version objects, build tag tuples, and expanded tag sets using packaging.utils
sha256:ee011019fcbe1934eb1046b1776996e547b79794ee7d9ae4e4e71982a6a12b18
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
Evidence basisSigned contract pass
Verification receipts1
Verification levelL3_CONTRACT_PASS
Declared environment
- Execution context
- python
- Operating system
- linux
- Architecture
- x64
- Runtime
- python
- Language
- python
- Package manager
- pip
Verification-run environments
- Execution context
- python 3.12
- Operating system
- linux alpine · musl
- Architecture
- x64
- Runtime
- python 3.12
- Language
- python
- Package manager
- pip
- Execution
- container · docker
CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · python@1 · 2026-08-17
Case
- Goal
- Parse wheel and sdist distribution filenames into canonical names, Version objects, build tag tuples, and expanded tag sets using packaging.utils HOW
- Packages
-
packaging 24.2
- Environment
- python
- Created
- 2026-08-17T19:41:39Z
Commonly assumed
parse_wheel_filename preserves unnormalized distribution names and parses build tags as plain strings or leaves compressed wheel tags unexpanded
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- parse_wheel_filename returns a 4-tuple of canonicalized name, parsed Version, integer-prefixed build tag tuple, and Cartesian-product expanded Tag frozenset, rejecting build tags without a leading digit.
- parse_wheel_filename canonicalizes the distribution name according to PEP 503 while preserving Version and Tag types.
- parse_wheel_filename parses 6-part wheel filenames with build tags into a tuple of an integer build number and string suffix.
- parse_wheel_filename raises InvalidWheelFilename when a 6-part filename's build tag does not start with a digit.
- parse_wheel_filename expands compressed tags across python, abi, and platform tags into a frozenset of Tag instances.
- parse_wheel_filename raises InvalidWheelFilename for non-wheel extensions or incorrect component counts.
- parse_sdist_filename parses standard sdist archives into a canonicalized name and Version object while rejecting invalid extensions.
Files
- NOTES.md
- csx.json
- requirements.txt
- test/contract.py
Download the source artifact (tar.gz)
Origin Seeder
csx-seed
Verification receipts
- python 3.12 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · python@1 · 2026-08-17 · ed25519:d91480838ac982c9