Python TKinter Gui: Toplevel window
#from pp3e Chapter 9.3
#############################################################################
# popup three new window, with style
# destroy() kills one window, quit() kills all windows and app; top-level
# windows have title, icon, iconify/deiconify and protocol for wm events;
# there always is an app root window, whether by default or created as an
# explicit Tk() object; all top-level windows are containers, but never
# packed/gridded; Toplevel is like frame, but new window, and can have menu;
#############################################################################
from Tkinter import *
root = Tk() # explicit root
trees = [('The Larch!', 'light blue'),
('The Pine!', 'light green'),
('The Giant Redwood!', 'red')]
for (tree, color) in trees:
win = Toplevel(root) # new window
win.title('Sing...') # set border
win.protocol('WM_
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