FastAPI

FastAPI is a modern, high-performance web framework for Python that's specifically designed for building APIs. It is based on Python 3.6+, and built using Starlette (for the web parts) and Pydantic (for data validation and serialization).

Key Features of FastAPI:

✅ Fast – One of the fastest Python frameworks available, with performance close to Node.js and Go (thanks to uvicorn and Starlette).

✅ Automatic Documentation – Generates interactive API docs automatically using Swagger UI and ReDoc.

✅ Type Safety – Leverages Python type hints to validate inputs and generate documentation automatically.

✅ Asynchronous Support – Full support for async/await, making it great for I/O-heavy tasks like database access or API calls.

✅ Easy to Use – Simple to learn and use, especially for developers familiar with Python and type annotations.

Simple Example:

from fastapi import FastAPI

app = FastAPI()

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

If you run this (e.g., with uvicorn main:app --reload), it starts a web server and gives you automatic interactive docs at http://localhost:8000/docs.