FastAPI: Fast & Modern API Development

A demo presentation on Python FastAPI, for Fast and Modern API Development.

This is a presentation that demonstrates:

- Basic API Endpoints: GET and POST requests.
- Dependency Injection: Cleaner and modular code.
- Background Tasks: Non-blocking operations for improved performance.

Show the advantages of FastAPI:

- Fast and Efficient: Leverages FastAPI’s asynchronous capabilities.
- Automatic Documentation: Swagger UI and ReDoc are generated automatically.
- Type-Checked Validation: Uses Pydantic models for data validation.
- Modular Design: Easily extendable for larger projects.

Author Information:

- LinkedIn: https://www.linkedin.com/in/wallaceespindola/
- GitHub: https://github.com/wallaceespindola
- E-mail: wallace.espindola@gmail.com
- Twitter: https://x.com/wsespindola
- Gravatar: https://gravatar.com/wallacese
- Dev Community Articles: https://dev.to/wallaceespindola
- DZone Articles: https://dzone.com/users/1254611/wallacese.html
- Pulse Articles: https://www.linkedin.com/in/wallaceespindola/recent-activity/articles/
- Website: https://www.wtechitsolutions.com/

Transcript

1. FastAPI: Fast & Modern API Development Wallace Espindola Software Engineer & Architect
2. • What is FastAPI • Advantages and disadvantages • Where are the good things • Being compact and simple • Top technologies used • What market says • How to start • Tricks and threats Schedule
3. Main learning takeaways 1) Discover FastAPI as technology for APIs; 2) Step-by-step on how to start, implement and run it; 3) Advantages and disadvantages; 4) Tips and tricks.
4. About me • Brazilian from Rio de Janeiro • 20+ years in IT career • Living in Belgium since 2017 • Profile: SW development & architecture • Stack: Back-end / Java / Python / APIs / Web • Speaks: English, Portuguese, French and basic Spanish • Experience in many industries: Government, Oil&Gas, Banking, Telecom, Defense, Education, MedTech.
5. Introduction to FastAPI • Modern framework built for quick & efficient API development • Uses async/await for non-blocking I/O • Auto-generated interactive docs (Swagger UI & ReDoc) • Built on Starlette & Pydantic • Born in Dec, 2018 • License MIT
6. Key Components of FastAPI • Pydantic: Data validation library that uses Python type hints for schema validation and serialization. • Starlette: Lightweight ASGI framework enabling async functionality in Python. • Uvicorn: Minimal ASGI server with a multi-process model for handling HTTP requests. • OpenAPI Integration: Auto-generates interactive API docs (Swagger UI & ReDoc) for real-time endpoint exploration and testing.
7. FastAPI in Action – A Basic API Example • Define endpoints with minimal code • Use Pydantic for data models and validation • May be run asynchronously • Auto-documented APIs with /docs or /redoc • Simple, compact and fast
8. Code Breakdown – What’s Happening? • Route Definitions: ◦ / : Welcome message, hello word! (isAlive endpoint) ◦ /items/{item_id} : Handles path & query parameters ◦ /items/ : POST endpoint with JSON body validation • Key Benefits: ◦ Reduced boilerplate code ◦ Built-in error handling via data validation
9. Dependency Injection Reusable logic with dependency injection:
10. Background Tasks Run tasks in the background without delaying responses:
11. Getting Started Installation*: Run: Explore interactive docs at: *Creating a virtual environment is always recommended.
12. Why Choosing FastAPI? Benefits: • Clean, intuitive syntax • High performance & scalability • Built-in data validation • Ideal for microservices, ML APIs, & real-time apps
13. Why in Python? Top programming language, great ascension: Reference: https://www.tiobe.com/tiobe-index/
14. Why in Python? Top programming language, great ascension: Reference: https://github.blog/news-insights/octoverse/octoverse-2024/
15. Yes, demo time!
16. If something went wrong, we have a workaround ;)
17. If something went wrong, we have a workaround ;)
18. The auto documentation endpoints
19. References https://www.tiobe.com/tiobe-index/ https://github.blog/news-insights/octoverse/octoverse-2024/ https://fastapi.tiangolo.com/ https://github.com/fastapi/fastapi https://github.com/Redocly/redoc https://github.com/swagger-api/swagger-ui https://docs.pydantic.dev/latest/ https://github.com/pydantic/pydantic https://www.starlette.io/ https://www.python.org/ https://en.wikipedia.org/wiki/FastAPI
20. Questions, insights, ideas Q&A / Discussion
21. How to find me LinkedIn: https://www.linkedin.com/in/wallaceespindola/ GitHub: https://github.com/wallaceespindola E-mail: wallace.espindola@gmail.com Twitter: @wsespindola Gravatar: https://gravatar.com/wallacese Dev Community Articles: https://dev.to/wallaceespindola Articles DZone Articles: https://dzone.com/users/1254611/wallacese.html Pulse Articles: https://www.linkedin.com/in/wallaceespindola/recent-activity/articles/ My company: https://www.wtechitsolutions.com/ Slides: https://speakerdeck.com/wallacese Thank you!!!