PyRefactor

A Python refactoring and optimization linter that uses AST analysis to identify performance issues, complexity problems, and code improvements.

Features

• Multi-threaded Analysis: Fast parallel file processing
• Configurable Detectors: Enable/disable specific detectors
• Severity Levels: Issues categorized as INFO, LOW, MEDIUM, or HIGH
• Flexible Output: Group by file or severity
• Cross-platform: Works on Windows, macOS, and Linux

Detectors

• Complexity: High cyclomatic complexity functions
• Performance: String concatenation in loops, uncached calls, inefficient operations
• Boolean Logic: Overcomplicated boolean expressions
• Loops: Nested loops, invariant code, comprehension opportunities
• Duplication: Duplicate code blocks
• Context Manager: Missing with statements for resource operations
• Control Flow: Unnecessary else after return/raise/break/continue
• Dictionary Operations: Non-idiomatic dict patterns, missing .get(), unnecessary .keys()
• Comparisons: Chained comparisons, singleton checks, type() vs isinstance()

Installation

Recommended: Via pip

pip install pyrefactor

Standalone Executable

Download the latest release from the Releases section. No Python installation required.

From Source

git clone https://github.com/tboy1337/PyRefactor.git
cd PyRefactor
pip install -e .

Requirements: Python 3.9+

Usage

# Analyze a file or directory
pyrefactor myfile.py
pyrefactor src/

# Show only medium/high severity issues
pyrefactor --min-severity medium src/

# Group by severity level
pyrefactor --group-by severity src/

# Use more workers for faster analysis
pyrefactor --jobs 8 src/

# Custom configuration file
pyrefactor --config custom.toml src/

Options

• -c, --config: Configuration file path (default: pyproject.toml)
• -g, --group-by: Group by file or severity (default: file)
• --min-severity: Minimum severity to report: info, low, medium, high (default: info)
• -j, --jobs: Number of parallel workers (default: 4)
• -v, --verbose: Enable verbose logging
• --version: Show version

Exit Codes

• 0 - No issues or only INFO/LOW severity
• 1 - MEDIUM/HIGH severity issues found
• 2 - Analysis error (syntax errors, invalid paths)

Configuration

Configure via TOML file (e.g., pyproject.toml):

[tool.pyrefactor]
exclude_patterns = ["__pycache__", ".venv", "build", "dist"]

[tool.pyrefactor.complexity]
max_complexity = 10

[tool.pyrefactor.performance]
enabled = true
min_concatenations = 3
min_duplicate_calls = 3

[tool.pyrefactor.boolean_logic]
enabled = true
min_depth = 3

[tool.pyrefactor.loops]
enabled = true
max_nesting = 3

[tool.pyrefactor.duplication]
enabled = true
min_lines = 5
similarity_threshold = 0.8

[tool.pyrefactor.context_manager]
enabled = true

[tool.pyrefactor.control_flow]
enabled = true

[tool.pyrefactor.dict_operations]
enabled = true

[tool.pyrefactor.comparisons]
enabled = true

Configuration is searched in: --config → pyproject.toml → pyrefactor.ini → defaults

CI/CD Integration

Pre-commit Hook

repos:
  - repo: local
    hooks:
      - id: pyrefactor
        name: PyRefactor
        entry: pyrefactor
        language: system
        types: [python]
        args: [--min-severity=medium]

GitHub Actions

name: Code Quality
on: [push, pull_request]

jobs:
  pyrefactor:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-python@v4
        with:
          python-version: '3.9'
      - run: pip install pyrefactor
      - run: pyrefactor --min-severity medium src/

Contributing

Contributions are welcome! This project is under a Commercial Restricted License (CRL). For commercial use, contact the copyright holder.

1. Follow existing code style (Black, isort)
2. Add tests for new features (>95% coverage)
3. Run type checking and linting

License

Licensed under the CRL license - see LICENSE.md for details.