rector 0.1.1

Regex generator that derives optimized patterns from example strings.

rector — Regex Generator

Rector generates optimized regular expressions from example strings, so you can quickly derive a compact pattern that matches your data. It follows the standard src/ layout, ships with a pyproject.toml, and is ready to publish to PyPI.

Features

• Generate a regex from multiple example strings with sensible character-class generalization
• Anchored patterns by default, with optional flags
• PyPI-ready packaging via hatchling and PEP 621 metadata
• BDD-ready pytest configuration plus a sample pytest-bdd feature
• src/ layout with type hints and minimal dependencies

Installation

pip install rector

For development (editable install plus tooling):

pip install -e .'[dev]'

Usage

from rector import RegexGenerator

generator = RegexGenerator()
pattern = generator.generate(["2025-11-28", "2024-01-01", "1999-12-31"])

assert pattern.fullmatch("2025-11-28")
assert not pattern.fullmatch("28/11/2025")

Development

• Run tests: pytest
• Focus on BDD scenarios: pytest tests/features
• Build a distribution: pip install hatchling && hatch build

Project layout

• pyproject.toml — packaging metadata and pytest config
• src/rector/ — package code
• tests/features/ — .feature files for BDD scenarios
• tests/steps/ — step definitions exercised by pytest-bdd