[Python] How can I add a menu before the first in Python tkInter?

I’m writing some code to add a menu to a tkInter application. Here is a working sample:

import tkinter

main = tkinter.Tk()
main.title('Menu Test')

menubar = tkinter.Menu(main)
main['menu'] = menubar

m = tkinter.Menu()
menubar.add_cascade(menu=m, label='First')
m.add_command(label='Thing', command=lambda: print('thing'))

m = tkinter.Menu()
menubar.add_cascade(menu=m, label='Second')
m.add_command(label='Whatever', command=lambda: print('whatever'))

# How to add another menu before 'First' ?

main.mainloop()


Is it possible to add another menu before the first menu (First) ?

Obviously, in this simple case, I can simply define it first, but I want to write a routine which populates a menu from a dictionary.

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