How do I set up environment and first app?

# Prerequisites - Python 3.7+ - Create virtual env: `python -m venv venv`, activate it # Install ```bash pip install "fastapi[standard]" ``` # Create `main.py` ```python from fastapi import FastAPI app = FastAPI() @app.get("/") def root(): return {"message": "Hello World"} ``` # Run ```bash fastapi dev main.py ``` Visit `http://127.0.0.1:8000/docs` for interactive docs.

How do I add path and query parameters?

## Update `main.py` ```python @app.get("/items/{item_id}") def read_item(item_id: int, q: str | None = None): return {"item_id": item_id, "q": q} ``` - Path param: `{item_id}` typed as `int` (auto-validates) - Query param: `q` optional Test in `/docs`: `/items/5?q=test`

How do I handle request bodies with pydantic?

## Add Pydantic model ```python from pydantic import BaseModel class Item(BaseModel): name: str price: float is_offer: bool | None = None @app.post("/items/") def create_item(item: Item): return item ``` - POST to `/items/` with JSON body - Auto-validates and docs schema

How do I integrate sql database?

## Install ```bash pip install sqlmodel ``` ## Key code (SQLite example) ```python from sqlmodel import SQLModel, Field, Session, create_engine, select class Hero(SQLModel, table=True): id: int | None = Field(default=None, primary_key=True) name: str secret_name: str sqlite_url = "sqlite:///./database.db" engine = create_engine(sqlite_url, connect_args={"check_same_thread": False}) SQLModel.metadata.create_all(engine) def get_session(): with Session(engine) as session: yield session @app.post("/heroes/") def create_hero(hero: Hero, session: Session = Depends(get_session)): session.add(hero) session.commit() session.refresh(hero) return hero ``` Run and test CRUD in docs.

How do I test, secure, and deploy?

## Testing ```python from fastapi.testclient import TestClient client = TestClient(app) def test_read_item(): response = client.get("/items/5?q=test") assert response.status_code == 200 ``` Run `pytest`. ## Deploy (Uvicorn production) ```bash pip install uvicorn uvicorn main:app --host 0.0.0.0 --port 80 ``` ## Docker See https://fastapi.tiangolo.com/deployment/docker/ Explore dependencies for auth: https://fastapi.tiangolo.com/tutorial/dependencies/

Master FastAPI: Build APIs Fast in 5 Steps

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Instant Toolkit

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Step-by-Step Guide

1

Prerequisites

Python 3.7+
Create virtual env: python -m venv venv, activate it

Install

pip install "fastapi[standard]"

Create `main.py`

from fastapi import FastAPI

app = FastAPI()

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

Run

fastapi dev main.py

Visit http://127.0.0.1:8000/docs for interactive docs.

Why this step matters:

-Establishes core setup for rapid iteration
-Enables immediate testing with auto-generated UI

30-60 minutes

Python 3.7+, pip, VS Code, Browser

$0

Definition of Done

•Server runs without errors
•Access /docs and test root endpoint
•Understand auto-docs generation

Common Mistakes to Avoid

❌ Missing quotes in pip install

→Use pip install "fastapi[standard]"

❌ Not activating virtual env

→Source venv/bin/activate or venv\Scripts\activate

2

Following along, or just reading? 👀

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🎥
Suggested Videos

Python FastAPI Tutorial (Part 1): Getting Started

FastAPI Tutorial for Beginners – Full Course

FastAPI Crash Course - Modern Python API Development

📚
Learning Resources

📖 Online Courses

FastAPI - The Complete Course 2026

beginner

Paid

Udemy

Introduction to FastAPI framework (Short Course)

beginner

Coursera

FastAPI Fundamentals

intermediate

Paid

Pluralsight

📖 Recommended Books

FastAPI: Modern Python Web Development

beginner

by Bill Lubanovic

Building Python Web APIs with FastAPI

intermediate

by Abdulazeez Abdulazeez Adeshina, Kennedy Dahal

🌐 Helpful Websites

FastAPI Official Documentation

documentation

Interactive tutorial and user guide

FastAPI GitHub

repository

Source code, examples, latest version 0.134.0

🛠️ Useful Tools

Uvicorn

Server

Lightning-fast ASGI server for production

Postman

Testing

API testing client

SQLModel

Database

SQLAlchemy + Pydantic for DB models

Master FastAPI: Build APIs Fast in 5 Steps