Chapter 9 Overview: Modules and Packages

Introduction

As your Python projects grow in size, keeping your code organized and reusable becomes essential. That’s where modules and packages come in. This chapter introduces you to these key concepts that allow code reuse, maintainability, and better project structure.

Topics Covered

• Modules: Learn how to break your Python code into smaller, manageable pieces and reuse them using modules.
• Namespaces: Understand the concept of variable and function naming scopes and how Python resolves them.
• Packages: Discover how to structure folders and files as importable libraries using packages.

Why Modules and Packages?

Using modules and packages offers several benefits:

• Improves code organization and separation of concerns
• Makes large codebases easier to navigate and debug
• Promotes reuse of code across multiple projects
• Enables teamwork by separating functionality into logical units

Real-World Use

Popular libraries like NumPy, Pandas, Flask, and Django are all built using packages and modules. Understanding this concept is essential for professional Python development.