Book Image

Building Python Web APIs with FastAPI

By : Abdulazeez Abdulazeez Adeshina
Book Image

Building Python Web APIs with FastAPI

By: Abdulazeez Abdulazeez Adeshina

Overview of this book

RESTful web services are commonly used to create APIs for web-based applications owing to their light weight and high scalability. This book will show you how FastAPI, a high-performance web framework for building RESTful APIs in Python, allows you to build robust web APIs that are simple and intuitive and makes it easy to build quickly with very little boilerplate code. This book will help you set up a FastAPI application in no time and show you how to use FastAPI to build a REST API that receives and responds to user requests. You’ll go on to learn how to handle routing and authentication while working with databases in a FastAPI application. The book walks you through the four key areas: building and using routes for create, read, update, and delete (CRUD) operations; connecting the application to SQL and NoSQL databases; securing the application built; and deploying your application locally or to a cloud environment. By the end of this book, you’ll have developed a solid understanding of the FastAPI framework and be able to build and deploy robust REST APIs.
Table of Contents (14 chapters)
Part 1: An Introduction to FastAPI
Part 2: Building and Securing FastAPI Applications
Part 3: Testing And Deploying FastAPI Applications

Understanding Jinja

Jinja is a templating engine written in Python designed to help the rendering process of API responses. In every templating language, there are variables that get replaced with the actual values passed to them when the template is rendered, and there are tags that control the logic of the template.

The Jinja templating engine makes use of curly brackets { } to distinguish its expressions and syntax from regular HTML, text and any other variable in the template file.

The {{ }} syntax is called a variable block. The {% %} syntax houses control structures such as if/else, loops, and macros.

The three common syntax blocks used in the Jinja templating language include the following:

  • {% … %} – This syntax is used for statements such as control structures.
  • {{ todo.item }} – This syntax is used to print out the values of the expressions passed to it.
  • {# This is a great API book! #} – This syntax is used when writing comments...