Pdf | Fastapi Tutorial

python -m venv venvsource venv/bin/activate # On Windows use venv\Scripts\activate

This tutorial serves as a comprehensive guide for those looking to master FastAPI, whether you are reading this online or saving it as a PDF for offline study. Introduction to FastAPI

Query Parameters: Used to filter or modify the request. In the read_item function, q is an optional query parameter because it has a default value of None. Request Body and Pydantic Models fastapi tutorial pdf

When you need to send data from a client to your API, you use a request body. FastAPI uses Pydantic models to define the structure of the data you expect. from pydantic import BaseModel

FastAPI is built on top of Starlette for the web parts and Pydantic for the data parts. It is designed to be easy to use for developers while providing production-grade performance. Key features include: python -m venv venvsource venv/bin/activate # On Windows

def common_parameters(q: str = None, skip: int = 0, limit: int = 10):return {"q": q, "skip": skip, "limit": limit}

One of the most powerful features of FastAPI is its automatic interactive API documentation. Once your server is running, you can visit: Request Body and Pydantic Models When you need

class Item(BaseModel):name: strdescription: str = Noneprice: floattax: float = None @app.post("/items/")def create_item(item: Item):return item

Standards-based: Fully compatible with OpenAPI and JSON Schema. Setting Up Your Environment

FastAPI is a robust framework that simplifies the process of building modern APIs. Its reliance on standard Python types makes it intuitive, while its performance keeps it competitive for high-traffic applications.