rb_choice = claustk.IntVar(value=1)

radiobutton = claustk.ClausRadiobutton(root, text="ClausRadiobutton 1", variable=rb_choice, value=1)
radiobutton.pack(padx=10, pady=10)

radiobutton2 = claustk.ClausRadiobutton(root, text="ClausRadiobutton 2", variable=rb_choice, value=2)
radiobutton2.pack(padx=10, pady=10)