python-pro

Replace pip workflows with uv by generating a lockfile via uv lock and installing with uv sync, which is significantly faster than pip. The skill guides updating pyproject.toml, CI pipelines, and virtual environment setup to match uv conventions.

Ruff is a single Rust-based tool that replaces flake8, black, and isort with much faster execution and unified configuration in pyproject.toml. It implements most flake8 rules and supports autofixing many violations.

Define endpoints with async def and use async libraries such as aiohttp, async SQLAlchemy 2.0 sessions, and asyncio for concurrency. Avoid blocking calls inside async handlers, since they stall the event loop and degrade throughput.

Structural pattern matching with match statements handles complex destructuring of mappings, sequences, and classes more readably than long if-elif chains. It is best for discriminating on data shape, not simple value comparisons.

Use asyncio for I/O-bound work like network calls and database queries, and multiprocessing or concurrent.futures for CPU-bound tasks that are limited by the GIL. Choosing the wrong model wastes resources without improving latency.