from Tkinter import *
state = ''
buttons = []
def onPress(i):
global state
state = i
for btn in buttons:
btn.deselect()
buttons[i].select()
root = Tk()
for i in range(10):
rad = Radiobutton(root, text=str(i),
value=str(i), command=(lambda i=i: onPress(i)) )
rad.pack(side=LEFT)
buttons.append(rad)
root.mainloop()
print state