List Focus for SO

import Tkinter, ttk

class tv(ttk.Treeview):
    #----------------------------------------------------------------------
    def __init__(self, master, *args, **kwargs):
        """"""
        ttk.Treeview.__init__(self, master, *args, **kwargs)

        print 'root got focus?', master.focus_get()
        self.items = [ self.insert( '', 'end',
                                text = str( i ) ) for i in range( 10 ) ]

        self['takefocus']= True

        self.selection_set(self.items[5])
        self.pack( fill = Tkinter.BOTH, expand = 1 )

        self.after(3000, self.focus_set)
        print 'just set focus', self.focus_set()
        print 'Treeview Focus set focus set? :', self.focus_get()
        print 'focus displayof', self.focus_displayof()

        #print 'selfs id', self.info()

        master.focus_set()
        print 'root got focus?', master.focus_get()

        self.bind('<Key>', self.callback)

    def callback(self, e):

        self.selection_set(self.items[2])
        print 'The TreeView Widget caught the key'

root = Tkinter.Tk()
root.config(takefocus=1)

def callback(e):
    print 'root caught key'

root.bind('<Key>', callback)

root.focus_set()
root.focus()

list2 = tv(root)

root.mainloop()