python Radiobutton get value sqlite

hej,

jestem totalnym beginerem i nie moge poradzic sobie z przekazaniem wybranej textowej wartosci do z Radiobuttonow do tabeli user_list

  def submit():         
     conn = sqlite3.connect("user_list.db")
     c = conn.cursor()
     c.execute("INSERT INTO user_wyniki VALUES ( :sport)",
     {
        'sport': my_Label_radio.get(),        
     } )


  varr = StringVar()
  varr.set("motor")

  def clicked(value):
    my_Label_radio = Label(root2, text=value)

  Radiobutton(root2, text="bieganie", variable=varr, value="bieganie", command=clicked(varr.get())).place(x=140, y=150, height=28, width=100)
  Radiobutton(root2, text="pływanie", variable=varr, value="pływanie", command=clicked(varr.get())).place(x=230, y=150, height=28, width=100)
  Radiobutton(root2, text="rower", variable=varr, value="rower", command=clicked(varr.get()))).place(x=320, y=150, height=28, width=100)
  Radiobutton(root2, text="motor", variable=varr, value="motor", command=clicked(varr.get())).place(x=410, y=150, height=28, width=100)