How to use the vizdoom.ScreenFormat function in vizdoom

self.config_file = level
        self.include_variables = include_variables
        self.factored_action = factored_action
        self.visualize = visualize
        self.frame_skip = frame_skip

        self.environment = DoomGame()
        self.environment.load_config(self.config_file)
        if self.visualize:
            self.environment.set_window_visible(True)
            self.environment.set_mode(Mode.ASYNC_PLAYER)
        else:
            self.environment.set_window_visible(False)
            self.environment.set_mode(Mode.PLAYER)
        # e.g. CRCGCB, RGB24, GRAY8
        self.environment.set_screen_format(ScreenFormat.RGB24)
        # e.g. RES_320X240, RES_640X480, RES_1920X1080
        self.environment.set_screen_resolution(ScreenResolution.RES_640X480)
        self.environment.set_depth_buffer_enabled(False)
        self.environment.set_labels_buffer_enabled(False)
        self.environment.set_automap_buffer_enabled(False)
        if seed is not None:
            self.environment.setSeed(seed)
        self.environment.init()

        self.state_shape = (480, 640, 3)
        self.num_variables = self.environment.get_available_game_variables_size()
        self.num_buttons = self.environment.get_available_buttons_size()
        self.available_actions = [
            tuple(a) for a in itertools.product([0, 1], repeat=self.num_buttons)
        ]

# load_config could be used to load configuration instead of doing it here with code.
    # If load_config is used in-code configuration will also work - most recent changes will add to previous ones.
    # game.load_config("../../scenarios/basic.cfg")

    # Sets path to additional resources wad file which is basically your scenario wad.
    # If not specified default maps will be used and it's pretty much useless... unless you want to play good old Doom.
    game.set_doom_scenario_path("../../scenarios/basic.wad")

    # Sets map to start (scenario .wad files can contain many maps).
    game.set_doom_map("map01")

    # Sets resolution. Default is 320X240
    game.set_screen_resolution(vzd.ScreenResolution.RES_640X480)

    # Sets the screen buffer format. Not used here but now you can change it. Default is CRCGCB.
    game.set_screen_format(vzd.ScreenFormat.RGB24)

    # Enables depth buffer.
    game.set_depth_buffer_enabled(True)

    # Enables labeling of in game objects labeling.
    game.set_labels_buffer_enabled(True)

    # Enables buffer with top down map of the current episode/level.
    game.set_automap_buffer_enabled(True)

    # Enables information about all objects present in the current episode/level.
    game.set_objects_info_enabled(True)

    # Enables information about all sectors (map layout).
    game.set_sectors_info_enabled(True)