CodeSampleX

Sample

download and cache files with pooch.retrieve and pooch.create

sha256:3fd1cf6fc218397b5869ff31ee51064ee9f21a6b03c54e8cf6ff85cc8ade3488

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 python 3.12 linux 24 · ubuntu · glibc 2.39 x64 python 3.12 python uv

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…		 2026-08-26

Case

HOW
Goal
download and cache files with pooch.retrieve and pooch.create
Packages
Symbols
  • pooch.create
  • pooch.retrieve
Environment
python 3.12
Created
2026-08-26T00:03:09Z

Contract

  1. pooch.create initializes a Pooch instance with base URL, cache directory, and file hash registry
  2. pooch.Pooch.get_url formats full download URLs for registered filenames
  3. pooch.Pooch.is_available verifies remote file availability via HTTP HEAD checks and raises ValueError if the file is not in registry
  4. pooch.Pooch.fetch downloads and validates remote files against registered checksums, returning local cache file paths
  5. pooch.Pooch.fetch reuses cached local files on subsequent calls without making additional network requests
  6. pooch.Pooch.fetch unpacks gzip archives when passed a pooch.Decompress processor
  7. pooch.retrieve downloads and validates single files directly to custom paths with SHA256 checksum verification
  8. pooch.retrieve raises ValueError when the downloaded content does not match the expected known_hash
  9. pooch.file_hash computes cryptographic SHA256 checksums of local files

Files

  • PROMPT.md
  • csx.json
  • pyproject.toml
  • requirements.txt
  • spec.json
  • test/contract.py
  • uv.lock

Download the source artifact (tar.gz)

Origin Seeder

anonymous