code: def set_canvas_title(self, text, canvas = 0):
          
          
          if canvas > self.__number_canvases:
              raise NameError('Canvas does ' + canvas + ' not exists.')
          
          self.__canvas_titles[canvas] = text
docs: !
          @brief Set title for specified canvas.
          
          @param[in] text (string): Title for canvas.
          @param[in] canvas (uint): Index of canvas where title should be displayed.