Description: This code demonstrates how to create a simple window using Gtk Builder. The main window is defined in an XML file called "mywindow.glade". The interface is loaded into the builder, and the "main_window" object is retrieved and added to the Gtk application. Example 2: Adding buttons to the window using Gtk Builderpython import gi gi.require_version('Gtk', '3.0') from gi.repository import Gtk class MyWindow(Gtk.ApplicationWindow): def __init__(self, app): Gtk.Window.__init__(self, title="Hello World", application=app) self.set_default_size(200, 200) self.set_border_width(10) builder = Gtk.Builder() builder.add_from_file("mywindow.glade") self.add(builder.get_object("main_window")) self.button1 = builder.get_object("button1") self.button2 = builder.get_object("button2") self.button1.connect("clicked", self.on_button1_clicked) self.button2.connect("clicked", self.on_button2_clicked) def on_button1_clicked(self, widget): print("Button 1 clicked") def on_button2_clicked(self, widget): print("Button 2 clicked") app = Gtk.Application() window = MyWindow(app) window.show_all() app.run() ``` Description: This code demonstrates how to add two buttons to the interface using Gtk Builder. The buttons are defined in the XML file and are retrieved from the builder using their ID. The "clicked" signal is connected to functions that print a message when each button is clicked.