code: def draw_key(self, surface, key):
          
          if isinstance(key, VSpaceKey):
              self.draw_space_key(surface, key)
          elif isinstance(key, VBackKey):
              self.draw_back_key(surface, key)
          elif isinstance(key, VUppercaseKey):
              self.draw_uppercase_key(surface, key)
          elif isinstance(key, VSpecialCharKey):
              self.draw_special_char_key(surface, key)
          else:
              self.draw_character_key(surface, key)
docs: Default drawing method for key. 
  
          Draw the key accordingly to it type.
  
          :param surface: Surface background should be drawn in.
          :param key: Target key to be drawn.