How may I define a tkinter object in separate file and call it back in different python file?

Question

The below codes work ok.

Db = ttk.Combobox(tab2, width=7)
Db[\'values\'] = (3.75, 8.5, 8.75, 12.25)
Db.place(x=(x_diff_cons+x_diff), y=y_diff_cons)
Db.current(2)