from gi.repository import Gtk class MyAssistant(Gtk.Assistant): def __init__(self): Gtk.Assistant.__init__(self) self.set_title("My Wizard") page1 = Gtk.Box() label1 = Gtk.Label("This is page 1") page1.pack_start(label1, True, True, 0) self.append_page(page1) self.set_page_title(page1, "Page 1") self.set_page_complete(page1, True) page2 = Gtk.Box() label2 = Gtk.Label("This is page 2") page2.pack_start(label2, True, True, 0) self.append_page(page2) self.set_page_title(page2, "Page 2") self.set_page_complete(page2, True) self.connect("cancel", Gtk.main_quit) self.connect("close", Gtk.main_quit) win = MyAssistant() win.show_all() Gtk.main()In this example, we create an instance of the `MyAssistant` class, which inherits from `Gtk.Assistant`. We add two pages to the wizard using `append_page`, set the titles of the pages using `set_page_title`, and mark them as complete using `set_page_complete`. We also connect the "cancel" and "close" signals to quit the application. Finally, we show the wizard and start the Gtk main loop. This code example uses the `Gtk` package library, which is part of the `python3-gi` package.