Why use FastAPI
FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints. It’s gaining more and more popularity these days, and it's arguably one of the best and most efficient web frameworks for Python.
High Performance
FastAPI is one of the fastest Python frameworks available. It is comparable to NodeJS and Go in terms of speed, and much faster than traditional Python frameworks like Flask and Django when used with an ASGI server.
Easy to Use
FastAPI is designed to be easy and intuitive to use, while also enabling high levels of extensibility and customization. It has a layered architecture, allowing you to choose the level of abstraction that you prefer, without losing functionality.
Robust Input Validation
FastAPI uses Pydantic for request body validation, which means you get robust and comprehensive input validation out of the box. This can catch errors early and make debugging easier.
Interactive API docs
FastAPI automatically generates interactive API documentation for your application. This makes it easier for your APIs to be understood and used by others, and can save you time and effort in maintaining separate API documentation.
Support for ASGI
FastAPI is built on Starlette, which means it has first-class support for the ASGI standard. ASGI support means you can use FastAPI with an ASGI server, such as Uvicorn or Hypercorn, to take advantage of the performance benefits of asynchronous programming.
Modern Python Features
FastAPI leverages modern Python features like async and await, type hints, and decorators. This makes it a joy to write highly efficient, asynchronous code in a modern Python style.
Support for OAuth2
FastAPI has built-in support for OAuth2, making it easy to build secure APIs with user authentication.
Data Serialization
FastAPI makes it easy to serialize and deserialize data using Python's built-in data types. This means you can easily convert between Python objects and JSON, and vice versa.
Exception Handling
FastAPI provides built-in exception handling, allowing you to handle expected and unexpected errors in a clean, consistent way.
In conclusion, FastAPI is a powerful and efficient tool for building APIs. Its performance, ease of use, and out-of-the-box features make it a great choice for both beginners and experienced developers alike. If you're looking to build APIs in Python, you should definitely consider FastAPI.