change text of a Tkinter Button by clicking it

[Sean McIlroy]

hello

(how) can you change the text of a Tkinter Button by clicking it?
something like

def click(index): return lambda: buttons[index].text = 'hello'
buttons = [Button(root,command=click(index)) for index in
range(numbuttons)]

only with an attribute that Buttons actually have. sorry to have to
ask such a see-spot-run question. thanks if you can help.

peace
stm