Flet is an open-source Python library for developing graphical user interfaces (GUIs) that run as desktop, web, or mobile apps. It supports rapid development with a modern, cross-platform API and a rich set of widgets, layouts, and advanced features. In this article, you'll learn how to use Flet to build GUI desktop applications. Getting started with a new GUI framework can feel daunting.

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Flet is a cross-platform Python GUI framework built on Flutter that enables developers to create desktop, web, and mobile applications using pure Python without HTML, CSS, or JavaScript. The tutorial covers installation via pip, creating a first app with the Page object, exploring various control categories (buttons, input fields, navigation bars, dialogs), implementing layouts using Column and Row containers, and handling user interactions through event callbacks. Code examples demonstrate practical implementations of text fields, dropdowns, checkboxes, sliders, navigation bars, alert dialogs, and responsive layouts.

First Steps With the Flet Library for Desktop and Web GUI Development