What is Event Handler in FastAPI?

In FastAPI, an event handler is a Python function that is executed automatically when specific events occur during the execution of your application. These event handlers allow you to perform custom actions or modify the behavior of your FastAPI application at different stages of its lifecycle. Event handlers are often used to set up database connections, perform cleanup operations, or customize request and response behaviors.

Types of FastAPI Event Handlers

• Startup
• Shutdown

A Python framework that is used for building APIs is called FastAPI. There are some circumstances when the user needs to identify a certain event that happened in the API. This can be done using event handlers in FastAPI. In this article, we will study the various event handlers available in FastAPI.