Fastapi Tutorial Pdf Apr 2026

FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.7+ based on standard Python type hints. In this tutorial, we'll explore the basics of FastAPI and build a simple API to demonstrate its capabilities.

from fastapi import FastAPI

You can download a PDF version of this tutorial [here](insert link to PDF). fastapi tutorial pdf

# PUT endpoint to update an existing item @app.put("/items/{item_id}") def update_item(item_id: int, item: Item): for existing_item in items: if existing_item["id"] == item_id: existing_item["name"] = item.name existing_item["description"] = item.description return existing_item return {"error": "Item not found"} FastAPI is a modern, fast (high-performance), web framework

app = FastAPI()

# GET endpoint to retrieve all items @app.get("/items/") def read_items(): return items FastAPI is a modern

pip install fastapi