PyGTK RadioButton Exemplo

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import gtk

class Application(object):
    def __init__(self):
        self.w = gtk.Window()
        self.w.set_title('Foo')
        self.w.set_position(gtk.WIN_POS_CENTER)

        self.w.connect('destroy', gtk.main_quit)

        self.vbox = gtk.VBox(False, 10)

        self.label = gtk.Label('Escolha o que comer:')

        self.op1 = gtk.RadioButton(label='Pipoca')
        self.op1.connect('released', self.on_radio_released)
        self.op2 = gtk.RadioButton(self.op1, 'Batata Frita')
        self.op2.connect('released', self.on_radio_released)
        self.op3 = gtk.RadioButton(self.op1, 'Sanduiche')
        self.op3.connect('released', self.on_radio_released)

        self.button = gtk.Button('Pronto!')
        self.button.connect('clicked', self.on_enter_button)

        self.vbox.pack_start(self.label)
        self.vbox.pack_start(self.op1)
        self.vbox.pack_start(self.op2)
        self.vbox.pack_start(self.op3)
        self.vbox.pack_start(self.button)

        self.active_radio = None

        self.w.add(self.vbox)

        self.w.show_all()

    def on_radio_released(self, widget):
        print widget.get_label(), 'selecionada.'
        print 'Ativos:'
        print 'self.op1:', self.op1.get_active()
        print 'self.op2:', self.op2.get_active()
        print 'self.op3:', self.op3.get_active()

    def on_enter_button(self, widget):
        label_str = ''
        if self.op1.get_active():
            label_str = self.op1.get_label()
        elif self.op2.get_active():
            label_str = self.op2.get_label()
        elif self.op3.get_active():
            label_str = self.op3.get_label()
        else:
            label_str = 'Nada ainda!'

        print 'Comendo:', label_str

    def on_application_quit(self, widget):
        gtk.main_quit()
        return False

Application()
gtk.main()