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5 Advanced Features of FastAPI You Should Try

Mounting applications, API routers, Jinja templates & much more

10 min readJan 17, 2022

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Photo by Chander R on Unsplash

Introduction

FastAPI is a modern web framework developed in Python. It has gained a lot of attraction in recent times. Its development structure is very much similar to Flask, which was the de-facto option for anyone starting with web development using Python. FastAPI is easy to use, its documentation is well written and easy to follow along.

FastAPI offers all the standard features of an API building tool but it is not limited to this. It comes with a lot of flexibility such as backward WSGI mounting support which, most of the users, are not aware of.

In this article, I will introduce some of the advanced features of FastAPI which I have been using for my recent projects. Also, the following use cases assume that you have a basic knowledge of FastAPI.

1. Include Flask, Django, Dash, or any other WSGI

FastAPI is an ASGI web framework. What this means is that different requests don’t have to wait for the others before them to finish doing their tasks. Different requests can do their task completion in no particular order. On the other hand, the WSGI frameworks process request in a sequential…

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Kaustubh Gupta
Kaustubh Gupta

Written by Kaustubh Gupta

Analytics Engineer building AI-powered data systems. Writing practical deep-dives on Analytics Engineering, GenAI workflows, and scalable data platforms.