Book Image

Modular Programming with Python

By : Erik Westra
Book Image

Modular Programming with Python

By: Erik Westra

Overview of this book

Python has evolved over the years and has become the primary choice of developers in various fields. The purpose of this book is to help readers develop readable, reliable, and maintainable programs in Python. Starting with an introduction to the concept of modules and packages, this book shows how you can use these building blocks to organize a complex program into logical parts and make sure those parts are working correctly together. Using clearly written, real-world examples, this book demonstrates how you can use modular techniques to build better programs. A number of common modular programming patterns are covered, including divide-and-conquer, abstraction, encapsulation, wrappers and extensibility. You will also learn how to test your modules and packages, how to prepare your code for sharing with other people, and how to publish your modules and packages on GitHub and the Python Package Index so that other people can use them. Finally, you will learn how to use modular design techniques to be a more effective programmer.
Table of Contents (16 chapters)
Modular Programming with Python
About the Author
About the Reviewer

Implementing the inventory control system

Now that we have a good idea of the overall structure for our system, what our various modules will be, and what functionality they will provide, it's time for us to start implementing the system. Let's start with the data storage module.

Implementing the data storage module

Create a directory somewhere convenient where you can store the source code for the inventory control system. You might want to call this directory inventoryControl or something similar.

Inside this directory, we will place our various modules and files. Start by creating a new, empty Python source file named This Python source file will hold our data storage module.


When selecting the name for our modules, we are following the Python convention of using all lowercase letters. You might find this a bit awkward at first, but it soon becomes easy to read. Please refer to for more information about...