How to Create a Python Library: A Step-by-Step Guide

Introduction

Creating a Python library is an essential skill for any Python programmer. It allows you to package your code for reuse in various projects or share it with the community. This guide will walk you through the process of creating a basic Python library, from planning to publishing.

Section 1: Planning Your Library

Before diving into coding, it’s crucial to plan your library. Define its purpose and the problems it aims to solve. A well-thought-out plan ensures your library remains focused and useful.

conceptual structure of a Python library

Section 2: Setting Up Your Development Environment

A proper development environment isolates your library development from other Python projects. Use venv to create a virtual environment code

python -m venv my_library_venv
source my_library_venv/bin/activate  # On Windows, use my_library_venv\Scripts\activate

Further Reading: Python Virtual Environments: A Primer

Section 3: Writing Your First Function

Start by writing a simple function. For instance, a function that adds two numbers:

def add(a, b):
    return a + b