A practical, no-nonsense guide to writing secure Python code in 2026 and beyond.
This open-source book covers Python Security Fundamentals with a strong focus on real-world practices, essential security tools, and actionable security recipes.
- Core security principles every Python developer should know
- How to secure common Python patterns and libraries
- Secure coding techniques
- Essential open-source security tools for Python
- Practical security recipes – step-by-step solutions to common security challenges
- Dependency management, supply chain security, and runtime protection
- Static Application Security Testing (SAST) and Software Composition Analysis (SCA)
- Fundamentals First – Clear explanations of specific Python weaknesses, vulnerabilities, and threats
- Secure Coding Guidelines - The best maintained collection of guidelines to create secure Python applications
- Practical Recipes – Ready-to-use, secure code patterns
- Tool Recommendations – Focused on using the best Free and Open Source (FOSS) tools
- Realistic Advice – Balanced between theory and production reality
- Regularly Updated – Keeping pace with the evolving Python and security landscape
- Python Code Audit – Best-in-class open-source Python SAST scanner
- Dependency scanners (pip-audit, Open Source Insights , etc.)
- And other essential security tools
You can read the book online at:
👉 https://nocomplexity.github.io/pythonsecurity/
Contributions are welcome! See CONTRIBUTING for details.
Simple ways to help:
- Star the repository
- Share with fellow Python developers
- Report issues or suggest improvements
- Submit pull requests for new recipes or corrections
This book is licensed under CC-BY 4.0 – you are free to share and adapt with attribution.
Made with ❤️ to Simplify Cyber Security Challenges
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