从python Gtk列表中选择一个选项并将其存储在变量中

liststore = Gtk.ListStore(str)
liststore.append(["选项1"])
liststore.append(["选项2"])
liststore.append(["选项3"])

combobox = Gtk.ComboBox.new_with_model(liststore)

cellrenderertext = Gtk.CellRendererText()
combobox.pack_start(cellrenderertext, True)
combobox.add_attribute(cellrenderertext, "text", 0)

combobox.set_active(0)  # 默认选中第一个选项

def on_combobox_changed(combobox):
    tree_iter = combobox.get_active_iter()
    if tree_iter is not None:
        model = combobox.get_model()
        option = model[tree_iter][0]
        selected_option = option

combobox.connect("changed", on_combobox_changed)