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

Setting up our test environment

In the previous section, we learned the basics of testing as well as what fixtures are. We will now test the endpoints for CRUD operations as well as user authentication. To test our asynchronous APIs, we’ll be making use of httpx and installing the pytest-asyncio library to enable us to test our asynchronous API.

Install the additional libraries:

(venv)$ pip install httpx pytest-asyncio

Next, we’ll create a configuration file called pytest.ini. Add the following code to it:

asyncio_mode = True

The configuration file is read when pytest is run. This automatically makes pytest run all tests in asynchronous mode.

With the configuration file in place, let’s create the umbrella test file,, which will be responsible for creating an instance of our application required by the test files. In the tests folder, create the conftest file:

(venv)$ touch tests/

We’ll start by importing...