Learn FASTAPI with Real Code Examples

Install Python 3.9+

Create a virtual environment (`python -m venv venv`)

Install FastAPI via `pip install fastapi`

Install an ASGI server like Uvicorn (`pip install uvicorn`)

Run server with `uvicorn main:app --reload`

Install Python 3.9+

Create and activate virtual environment

Install FastAPI and Uvicorn

Configure IDE/editor for async Python

Verify server runs and docs are accessible

main.py - entry point

routers/ - route modules

models/ - Pydantic models

dependencies/ - reusable dependencies

services/ - business logic

python -m venv venv -> create virtual environment

pip install fastapi uvicorn -> install FastAPI + server

uvicorn main:app --reload -> run development server

pip install pytest -> add testing framework

pip install pydantic -> ensure data validation

Use third-party libraries for i18n

Supports UTF-8 encoded responses

Serve locale-specific content

Integrates with translation utilities

Suitable for multilingual APIs

Supports CORS via middleware

Accessible through HTTP clients

Supports all ASGI-compatible platforms

Middleware ensures security headers

Framework-agnostic for clients

Not handled - backend framework only

Serve JSON APIs for frontend consumption

Can serve templates with Jinja2 if needed

Integrate with frontend SPA frameworks

Dynamic pages possible via template rendering

Stateless by default

Persistent state via database connections

Session management with JWT or cookies

Background tasks for async state updates

Caching for frequently accessed data

Validate and serialize using Pydantic models

Parse JSON requests automatically

Connect to SQL/NoSQL databases

Cache data using Redis or in-memory stores

Log requests and responses for monitoring