How to write and publish a Python package to PyPI

Short summary

A step-by-step tutorial on using uv, a modern Python toolchain written in Rust, to create and publish reusable packages to PyPI. The guide walks through project scaffolding, dependency management with uv.lock, and packaging a realistic Scrapy download handler example. Your completed package becomes instantly installable via pip or uv add across all projects with automatic updates.

• •uv simplifies Python packaging, replacing pip, virtualenv, twine, and build tools in a single unified CLI
• •Step-by-step walkthrough from project scaffolding to publishing a production-ready Scrapy handler package
• •Published packages become instantly shareable and updateable across all your projects without manual file copying

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