Adding a sub menu to a ttk.OptionMrnue ?

[Robo]

Hi,
Thanks for the response but it's not quite what I wanted.

This is how I create my main drop down menu which works fine, I hope it helps.
I wanted to add a submenu to Item6, which are: sub1 and sub2


Var1 = tk.StringVar(Fbtn1)
list=[' Item1 ) ',' Item2 ',' Item3 ',' Item4 ',' Item5 ',' Item6 ) ']

Mbtn1 = ttk.OptionMenu(Fbtn1, Var1, list[2], *list,style= 'O.TLabel',
command = (Dropdown_Main_Menu))
Mbtn1['menu'].configure(background= 'lightgray') # Change Menu Background Colour

Any advise how to add a submenu to the code would be most appreciated.

Robo