Building Fast and Efficient Web APIs with FastAPI in Python

FastAPI is a modern, fast, and efficient web framework for building APIs in Python. It is built on top of the Starlette framework and Pydantic, leveraging the latest features of the Python programming language. FastAPI is easy to use and provides automatic validation, serialization, and documentation for your API, making it a powerful and developer-friendly choice for building web applications.

In this article, we’ll explore the basics of FastAPI, including how to set up a FastAPI project, define API endpoints, and use FastAPI’s powerful features such as dependency injection and validation.

Setting Up a FastAPI Project

To start using FastAPI, first, you need to install it. You can do this using pip:

pip install fastapi

You’ll also need an ASGI server such as uvicorn to run your FastAPI application. Install it with:

pip install uvicorn

Now, let’s create a simple FastAPI application. Create a new Python file called main.py, and add the following code:

from fastapi import FastAPI

app = FastAPI()

@app.get("/")
def read_root():
    return {"Hello": "World"}