Button not defined, why?

[metulburr]

buttons.append(Button(etc))

in his example buttons is a list of tkinter.Button objects.

list = ['btn1', 'btn2', etc]

If your listing out wishing the variables names to be btn1 and btn2...whats the point? you might as well stick them in a list and identify them by index anyways. buttons[0] will be the first and so on.

If you actually want to make custom names, just use a dictionary
buttons['exit'] and so on.