Day 1/100: Building Your First FastAPI REST API - A Complete Beginner's Guide

Day 1/100: Building Your First FastAPI REST API - A Complete Beginner's Guide Part of my 100 Days of Code journey. Follow along as I build production-ready Python skills. Introduction Welcome to Day 1 of my 100 Days of Code challenge! Today, I'm diving into FastAPI, a modern Python web framework that's taking the backend world by storm. If you've been using Flask or Django and wondering what all the FastAPI hype is about, this post is for you. By the end of this tutorial, you'll understand how to build a complete REST API from scratch, including proper validation, error handling, and auto-generated documentation. Why FastAPI? Before we dive into code, let's talk about why FastAPI matters: Fast : As the name suggests, it's one of the fastest Python frameworks available (comparable to Node.js and Go) Modern : Built on modern Python features like type hints and async/await Auto-validation : Pydantic models validate requests automatically Auto-docs : Interactive API documentation generated