pyrewire 1.0.2

Python wrapper for wirelog - declarative dataflow analysis

PyreWire

The ci workflow runs the full lint gate (black, isort, flake8, mypy) and the test matrix; docs builds and publishes the documentation site.

A Python wrapper for wirelog - a declarative dataflow analysis engine.

Overview

PyreWire provides a Pythonic interface to wirelog, enabling you to write datalog programs and perform analysis programmatically from Python.

Installation

pip install pyrewire

Requirements: CPython 3.11, 3.12, 3.13, or 3.14.

See the support matrix for v1.0 wheel targets and source-install requirements, including supported OS/architecture combinations and libwirelog handling. The API stability policy defines the v1.0 stable public import boundary and deprecation policy.

Quick Start

PyreWire programs are written in wirelog's datalog dialect and driven through one of the high-level surfaces below.

One-shot evaluation with BatchProgram

Use BatchProgram to parse a program, optimize it, and compute the full IDB closure in a single pass:

from pyrewire import BatchProgram

# A tiny reachability program: two edges plus a transitive-closure rule.
src = """
.decl edge(x: int32, y: int32)
.decl reach(x: int32, y: int32)
edge(1, 2). edge(2, 3).
reach(X, Y) :- edge(X, Y).
reach(X, Z) :- reach(X, Y), edge(Y, Z).
"""

with BatchProgram.from_string(src) as program:
    program.optimize()
    result = program.evaluate()
    try:
        print(result.cardinality("reach"))   # 3
        print(result.relation("reach"))      # [(1, 2), (2, 3), (1, 3)]
    finally:
        result.close()

Incremental work with EasySession

EasySession interns strings automatically and lets you insert / remove facts, then either snapshot a relation's full contents or step the engine for incremental deltas. A session commits to a single mode the first time you query it, so use a fresh session per mode:

from pyrewire import EasySession

SRC = """
.decl friend(a: symbol, b: symbol)
.decl mutual(a: symbol, b: symbol)
mutual(A, B) :- friend(A, B), friend(B, A).
"""

# snapshot(): read a relation's full IDB contents.
with EasySession(SRC) as s:
    s.insert("friend", ["alice", "bob"])
    s.insert("friend", ["bob", "alice"])
    print(s.snapshot("mutual"))   # [('alice', 'bob'), ('bob', 'alice')]

# step(): drive one fixpoint step and read the incremental deltas.
with EasySession(SRC) as s:
    s.insert("friend", ["alice", "bob"])
    s.insert("friend", ["bob", "alice"])
    for relation, row, diff in s.step():
        print(relation, row, diff)   # e.g. mutual ('alice', 'bob') 1

For caller-owned programs, backend selection, and NumPy zero-copy inserts, see Session; for asyncio integration see AsyncEasySession, AsyncSession, and AsyncBatchProgram. The Quickstart walks through each surface.

Features

• Pythonic API over wirelog's declarative dataflow engine
• Batch closure (BatchProgram) and incremental sessions (EasySession, Session)
• NumPy zero-copy batched inserts on the advanced Session API
• asyncio wrappers that satisfy wirelog's single-threaded call invariant

Development

Setup

git clone https://github.com/semantic-reasoning/PyreWire
cd PyreWire
pip install -e ".[dev]"

Running Tests

pytest

Code Quality

black .
isort .
flake8 .
mypy .

Community & Contributing

We appreciate your interest in contributing to PyreWire!

• Contributing Guide: Learn how to set up development, run tests, and submit pull requests
• Code of Conduct: Read our community standards and expected behavior
• Security Policy: Report security vulnerabilities responsibly

License

PyreWire (Python Wrapper): dual-licensed under either of

• Apache License, Version 2.0
• GNU General Public License, version 3 or (at your option) any later version

at your option.

wirelog (Core Engine): LGPL-3.0 / Commercial Dual License

Note: PyreWire links to the wirelog core engine. Use of the core engine is subject to its respective license terms.

Contributing

Contributions are welcome! Please open an issue or submit a pull request.