code: def onchange(self, new_value):
          
          self.disable_refresh()
          self.set_value(new_value)
          self.enable_refresh()
          return (new_value, )
docs: Called when the user changes the TextInput content.
          With single_line=True it fires in case of focus lost and Enter key pressed.
          With single_line=False it fires at each key released.
  
          Args:
              new_value (str): the new string content of the TextInput.