pychd-pyfuzz 0.1.0

Random syntactically-valid Python source generator — produces never-published code for contamination-free decompiler benchmarking

pychd-pyfuzz

Random, syntactically-valid Python source generator. Built to feed contamination-free benchmarks for pychd (the Python .pyc decompiler) and any other decompiler that wants the same.

Every sample is constructed directly from ast.AST nodes (not text templates), so it is — by construction — a code path that has never appeared anywhere on the internet and cannot be in any LLM's training data. Pair with pychd-pyobf (which strips identifiers + constants from compiled .pyc) for the strongest available contamination guarantee.

See the main pychd README for the broader story.

Install

pip install pychd-pyfuzz

Use

# 100 samples targeting Python 3.14:
pychd-pyfuzz generate --target 3.14 --count 100 --seed 0 --out /tmp/fuzz/

Each emitted .py file is accompanied by a sidecar .tags.json with the syntactic-feature tags the sample actually exercised (match, try_star, walrus, fstring, type_params, …) so downstream benchmarks can break recovery rates out by feature.

Status

Pre-release. API and CLI are still evolving with the parent project.