Flet is a Python framework for building web, desktop, and mobile applications. It requires no prior frontend development experience.

Platform Support

Getting Started

Installation

pip install 'flet[all]'

Creating and Running an App

import flet as ft
def main(page: ft.Page):
    page.title = "Flet counter example"
    page.vertical_alignment = ft.MainAxisAlignment.CENTER
    input = ft.TextField(value="0", text_align=ft.TextAlign.RIGHT, width=100)
    def minus_click(e):
        input.value = str(int(input.value) - 1)
        page.update() # Added for clarity, though not in original
    def plus_click(e):
        input.value = str(int(input.value) + 1)
        page.update() # Added for clarity, though not in original
    page.add(
        ft.Row(
            alignment=ft.MainAxisAlignment.CENTER,
            controls=[
                ft.IconButton(ft.Icons.REMOVE, on_click=minus_click),
                input,
                ft.IconButton(ft.Icons.ADD, on_click=plus_click),
            ],
        )
    )
ft.run(main)

To run:

flet run counter.py

To run as web app:

flet run --web counter.py

Further Resources