In a detailed guide, the process of creating a FastAPI application is outlined to help users manage and access upcoming events from their contacts using the Nylas Python SDK. The tutorial walks through setting up the required environment, installing dependencies, and building the application to list contacts and retrieve their upcoming events, which are defined as those that have not yet occurred. The application uses FastAPI due to its speed and simplicity, and the implementation involves setting up a basic folder structure, creating templates for displaying data, and using Python libraries like Pendulum and BeautifulSoup to handle dates and HTML content. Users are guided on running the application using Uvicorn, with the final application designed to run on port 8000, providing a user-friendly interface to manage and view contact events effectively. The guide also provides links to additional resources for further exploration of the Nylas Contacts and Calendar APIs.