human
I wrote the below code

    from Tkinter import Menu, Text, Text
    from idlelib.EditorWindow import prepstr, get_accelerator
    from idlelib import Bindings
    from idlelib import WindowList
    from idlelib.MultiCall import MultiCallCreator
    menubar = Menu(root)
    root.configure(menu=menubar)
    menudict = {}
    menudict['windows'] = menu = Menu(menubar, name='windows')
    menubar.add_cascade(label='Window', menu=menu, underline=0)
    def postwindowsmenu(menu=menu):
        end = menu.index('end')
        if (end is None):
            end = (-1)
        if (end > 0):
            menu.delete(0, end)
        WindowList.add_windows_to_menu(menu)
    WindowList.register_callback(postwindowsmenu)
    def about_dialog(event=None):
        from idlelib import aboutDialog
        aboutDialog.AboutDialog(root, 'About    IDLE')
    def config_dialog(event=None):
        from idlelib import configDialog
        root.instance_dict = flist.inversedict
        configDialog.ConfigDialog(root, 'Settings')
    def help_dialog(event=None):
        from idlelib import textView
        fn = path.join(path.abspath(path.dirname(__file__)), 'help.txt')
        textView.view_file(root, 'Help', fn)
    root.bind('<<about-idle>>', about_dialog)
    root.bind('<<open-config-dialog>>', config_dialog)
    root.createcommand('::tk::mac::ShowPreferences', config_dialog)
    if flist:
        root.bind('<<close-all-windows>>', flist.close_all_callback)
        root.createcommand('exit', flist.close_all_callback)
    if isCarbonAquaTk(root):
        menudict['application'] = menu = Menu(menubar, name='apple')
        menubar.add_cascade(label='IDLE', menu=menu)
        Bindings.menudefs.insert(0, ('application', [('About    IDLE', '<<about-idle>>'), None]))
        tkversion = root.tk.eval('info    patchlevel')
        if (tuple(map(int, tkversion.split('.'))) < (8, 4, 14)):
            Bindings.menudefs[0][1].append(('_Preferences....', '<<open-config-dialog>>'))
    else:
        root.createcommand('tkAboutDialog', about_dialog)
       ...

What's a good function header?

=====
Here's a good function header?
assistant
#Here's a good function header.

def overrideRootMenu(root, flist):