Welcome to Day 4! Today is all about clean architecture, dependency isolation, and modern Python tooling. You will learn how to structure your files, control execution flows, use modern tools like uv to manage virtual environments at lightning speed, and organize a codebase like a professional software engineer. 🚀
1. Modules & Packages 📦
Module: A single .py file containing variables, functions, or classes you want to reuse.
Package: A directory of modules.
__init__.py: Runs automatically when a package is imported, allowing you to expose a clean top-level API and hide internal folder nesting.
