[Amias]

why?Code below doesnot work, however gtk-test.py works normally

Spoiler:

#!/usr/bin/env python

import pygtk
import gtk
pygtk.require('2.0')

class PyApp(gtk.Window):

def __init__(self):
super(PyApp, self).__init__()
self.set_title("Check Button")
self.set_default_size(250, 200)

vbox = gtk.VBox()
self.btn1 = gtk.CheckButton("Button 1")
self.btn1.connect("toggled", self.on_checked)
self.btn2 = gtk.CheckButton("Button 2")
self.btn2.connect("toggled", self.on_checked)
self.lbl = gtk.Label()
quitBtn = gtk.Button("quit the test.")
quitBtn.connect("clicked", lambda w: gtk.main_quit())

vbox.add(quitBtn)
vbox.add(self.btn1)
vbox.add(self.btn2)
vbox.add(self.lbl)

self.add(vbox)
self.connect("destroy", gtk.main_quit)
self.show_all()

def on_checked(self, widget, data = None):
state = "Button1 : "+str(self.btn1.get_active())+"Button2 : "+str(self.btn2.get_active())
self.lbl.set_text(state)

if __name__ =="__main__":
PyApp()
gtk.main()