How can I build an API using FastAPI and async features?

How can I build an API using FastAPI and async features?

You can start by installing FastAPI and an ASGI server like Uvicorn. Would you like a code example?

Yes, please provide a simple example of an async API.

Here's a basic example:

from fastapi import FastAPI

app = FastAPI()

@app.get("/items/{item_id}")
async def read_item(item_id: int):
    return {"item_id": item_id}

This creates an endpoint that returns the item ID asynchronously.

How do I run this FastAPI app?

You can run it using Uvicorn with the command: uvicorn your_file_name:app --reload. This will start the server.

What are some best practices for building APIs with FastAPI?

Some best practices include using Pydantic for data validation, organizing your code into routers, and writing tests.