code: def __set_style_sheet(self):
          
  
          colors = map(
              lambda x: "rgb({0}, {1}, {2}, {3})".format(x.red(), x.green(), x.blue(), int(self.__opacity * 255)),
              (self.__color, self.__background_color, self.__border_color))
          self.setStyleSheet(self.__style.format(*colors))
docs: Sets the Widget stylesheet.