Modern web APIs with FastAPI

FastAPI turns your type hints into validation, serialisation and documentation for free. We start from a single endpoint and grow it into a complete, tested application with a database, authentication and real time, ready for production.

Duration: 3 days · Level: intermediate

For: Python developers who want to build modern, fast web APIs.

Prerequisites: solid Python; some notions of asynchronous programming are a plus.

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Day 1 — Web APIs with FastAPI

FastAPI vs Flask vs Django
Installation and a first project
ASGI architecture and performance
Route decorators and HTTP methods
Path parameters and validation
Typed query parameters
Request bodies with Pydantic
Pydantic models: schemas, nesting and custom types
Serialisation and deserialisation
Status codes, response models, headers and cookies
HTTPException and custom exception handlers
Automatic documentation

Day 2 — Database and auth

SQLAlchemy with FastAPI: async configuration
Models and schemas
Sessions as dependencies
Transactions
SQLModel, by the creator of FastAPI
Async queries, relations and joins
Migrations with Alembic
Authentication with tokens vs cookies
Rate limiting
CORS configuration
CSRF protection for forms

Day 3 — Complete apps, production

WebSockets: real-time connections
Broadcasting, rooms and channels
Example: a chat application
HTML applications with Jinja2 templates
HTML forms
Task queues
Unit and integration tests
Static files
Going to production

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