Can you explain what FastAPI is and its advantages for web application development?

FastAPI is a modern web framework for Python, focused on creating high-performance APIs with ease of use.

Advantages of FastAPI:

• High development speed thanks to the use of Python type annotations and automatic documentation generation (Swagger/OpenAPI).
• Performance comparable to Node.js and Go, as it is based on the asynchronous server Starlette and Pydantic for validation.
• Automatic data validation and type conversion based on annotations.
• Support for asynchronous programming out of the box.
• Integration with modern tools and ease of testing.

Example of a simple FastAPI application:

from fastapi import FastAPI

app = FastAPI()

@app.get("/hello")
async def read_root():
    return {"message": "Hello, FastAPI!"}