labs.py

import flet as ft
def main(page: ft.Page):
    page.title = "Python Labs | Counter"
    input = ft.TextField(value='0', text_align=ft.TextAlign.CENTER, width=100)
    header = ft.Text("PYTHON LABs", size=40, weight=ft.FontWeight.BOLD)

    def minus_click(e):
        input.value = str(int(input.value) - 1)
        page.update()
    def plus_click(e):
        input.value = str(int(input.value) + 1)
        page.update()

    page.add(
        ft.Column(
            expand=True,
            controls=[
                ft.Row(
                    alignment=ft.MainAxisAlignment.CENTER,
                    controls=[header]
                ),
                ft.Row(
                    expand=True,
                    alignment=ft.MainAxisAlignment.CENTER,
                    vertical_alignment=ft.CrossAxisAlignment.CENTER,
                    controls=[
                        ft.IconButton(ft.Icons.REMOVE, on_click=minus_click),
                        input,
                        ft.IconButton(ft.Icons.ADD, on_click=plus_click)
                    ]
                )
            ]
        )
    )
ft.run(main, target="web")