This worked very well for me:
>>> import Tkinter >>> root = Tkinter.Tk() >>> root.overrideredirect(True) >>> root.geometry("{0}x{1}+0+0".format(root.winfo_screenwidth(), root.winfo_screenheight()))
I use OS X - the title bar and the top-level menu bar remained, but the window closed the dock. Let me know if you need more.
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