other variation of pygtk window creation

window.py

import gtk



class Podcaster(gtk.Window):

    

    def __init__(self):
        super(Podcaster, self).__init__()
        self.set_position(gtk.WIN_POS_CENTER)
        self.connect("destroy", gtk.main_quit)
        
        self.set_title("Podcaster")
        self.connect("destroy", self.destroy)
        self.set_default_size(300,300)
        
        self.button = gtk.Button("Hello World")
        self.button.connect("clicked", self.hello, None)
        
        self.add(self.button)
        
        
        self.show_all()

    def hello(self, widget, data=None):
        
        md = gtk.MessageDialog(self, 
            gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_INFO, 
            gtk.BUTTONS_CLOSE, "Download completed")
        md.run()
        md.destroy()
        
        
if __name__ == "__main__":
    Podcaster()
    gtk.main()