import tkinter

messages = {"python": "Ok do that"
	, "C": "Ok that is fine"
	, "Fortran": "Weird but ok"
	, "Perl": "Go back to your BDSM buddies"
	, "Haskell": "Weird flex but ok"
}

root = tkinter.Tk()
selection = tkinter.StringVar()

textbox = tkinter.Text(root, height=1, width=30)
textbox.pack(anchor=tkinter.W)

def on_selection_changed():
	my_selection = selection.get()
	on_selection_changed_callback(my_selection)

for s in messages.keys():
	r = tkinter.Radiobutton(root, text=s, command=on_selection_changed
					, variable=selection
					, value=s)
	r.pack(anchor=tkinter.W)


def on_selection_changed_callback(selection):
	textbox.delete("1.0", tkinter.END)
	textbox.insert(tkinter.END, messages[selection])



root.mainloop()