Browse by Topic
Curated entry points for the tools and tasks at the heart of modern Python development. Each topic gathers tutorials, how-tos, explanations, and reference pages from across the handbook into a single guide.
uv
Python's fastest package and project manager
Ruff
Fast linting and formatting
ty
Astral's new type checker
Testing
Pytest, fixtures, parallel runs, and CI
Packaging
Build wheels, lock dependencies, publish to PyPI
Security
Supply chain, attestations, vulnerability scans
Scientific Python
NumPy, CUDA, conda, pixi, ML stacks
AI Assistants
Claude Code, Cursor, Codex, GitHub Copilot
Type Checking
mypy, ty, Pyright, gradual typing, strict mode
Virtual Environments
pyenv, venv, virtualenv, isolation, system Python
Coming from Another Language
Python tooling for Go, Rust, TypeScript, Java, and C# developers
Performance & Profiling
Profile CPU and memory, read flame graphs, benchmark Python code