parameters: (self, index)
docstring: Display the element at INDEX with activebackground and activerelief.
          INDEX can be "arrow1","slider" or "arrow2".
docstring_summary: Display the element at INDEX with activebackground and activerelief.
          INDEX can be "arrow1","slider" or "arrow2".
docstring_tokens: Display the element at INDEX with activebackground and activerelief . INDEX can be arrow1 slider or arrow2 .
function: def activate(self, index):
          """Display the element at INDEX with activebackground and activerelief.
          INDEX can be "arrow1","slider" or "arrow2"."""
          self.tk.call(self._w, 'activate', index)
function_tokens: def activate ( self , index ) : self . tk . call ( self . _w , 'activate' , index )