def __init__(self, master):
    tk.Frame.__init__(self, master)
    self.pack()

    self.button_bonus = ttk.Button(self, text="Bonuses", command=popup)
    self.button_bonus.pack()

    self.button_showinfo = ttk.Button(self, text="Show Info", command=popup_showinfo)
    self.button_showinfo.pack()`