Python Patterns

This is a decision-making framework for Python development in 2025, not a pattern library to copy from. It walks you through choosing between FastAPI, Django, and Flask based on what you're actually building, explains when async makes sense versus when it's overkill, and covers project structure that scales with complexity. The philosophy is solid: ask about context, don't default to the same stack every time, understand I/O-bound versus CPU-bound work. Good for teams that keep bikeshedding architecture decisions or juniors who cargo-cult async everywhere. The type hints and testing sections are practical without being prescriptive.