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Lesson 34 of 40 Advanced Python Expert ⏱ 35 min

Metaprogramming — __dunder__, slots & meta

Go deep into Python's object model — metaclasses, __init_subclass__, __class_getitem__, descriptors, and runtime class manipulation.

Part 1: Introduction to Metaprogramming — __dunder__, slots & meta

Go deep into Python's object model — metaclasses, __init_subclass__, __class_getitem__, descriptors, and runtime class manipulation.


This lesson uses Python 3.13 features and follows best practices for development in Visual Studio 2026 with Copilot assistance.

Part 2: Core Concepts & Code Examples

# Metaprogramming — __dunder__, slots & meta — Python 3.13 Example
from typing import Any

def main() -> None:
    """Entry point demonstrating lesson 34 concepts."""
    print(f"Lesson 34: Metaprogramming — __dunder__, slots & meta")

if __name__ == "__main__":
    main()

Part 3: Best Practices & Patterns

Apply the patterns from this lesson consistently across your projects. Visual Studio 2026's Python IntelliSense, type checking integration, and GitHub Copilot will guide you toward idiomatic, production-ready Python 3.13 code.

  • Use type hints for all function signatures
  • Write docstrings with Args/Returns sections
  • Run ruff for linting, mypy for type checking
  • Test every function with at least one pytest test

Part 4: Next Steps

Practice these concepts hands-on, then continue to Lesson 35. Return to Python Tutorial Home to see the full curriculum, or visit VisualStudioTutor.com for Visual Studio 2026 guides.

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