from flet import AppBar, ElevatedButton, Page, Text, View, colors

def route_change(e):
    print("Route change:", e.route)
    page.views.clear()
    page.views.append(
        View(
            "/",
            [
                AppBar(title=Text("Flet app")),
                ElevatedButton("Go to settings", on_click=open_settings),
            ],
        )
    )
    page.update()