def render()

in gym/envs/toy_text/blackjack.py [0:0]
102 lines of code
8 McCabe index (conditional complexity)

    def render(self):
        if self.render_mode is None:
            gym.logger.warn(
                "You are calling render method without specifying any render mode. "
                "You can specify the render_mode at initialization, "
                f'e.g. gym("{self.spec.id}", render_mode="rgb_array")'
            )
            return

        try:
            import pygame
        except ImportError:
            raise DependencyNotInstalled(
                "pygame is not installed, run `pip install gym[toy_text]`"
            )

        player_sum, dealer_card_value, usable_ace = self._get_obs()
        screen_width, screen_height = 600, 500
        card_img_height = screen_height // 3
        card_img_width = int(card_img_height * 142 / 197)
        spacing = screen_height // 20

        bg_color = (7, 99, 36)
        white = (255, 255, 255)

        if not hasattr(self, "screen"):
            pygame.init()
            if self.render_mode == "human":
                pygame.display.init()
                self.screen = pygame.display.set_mode((screen_width, screen_height))
            else:
                pygame.font.init()
                self.screen = pygame.Surface((screen_width, screen_height))

        if not hasattr(self, "clock"):
            self.clock = pygame.time.Clock()

        self.screen.fill(bg_color)

        def get_image(path):
            cwd = os.path.dirname(__file__)
            image = pygame.image.load(os.path.join(cwd, path))
            return image

        def get_font(path, size):
            cwd = os.path.dirname(__file__)
            font = pygame.font.Font(os.path.join(cwd, path), size)
            return font

        small_font = get_font(
            os.path.join("font", "Minecraft.ttf"), screen_height // 15
        )
        dealer_text = small_font.render(
            "Dealer: " + str(dealer_card_value), True, white
        )
        dealer_text_rect = self.screen.blit(dealer_text, (spacing, spacing))

        def scale_card_img(card_img):
            return pygame.transform.scale(card_img, (card_img_width, card_img_height))

        dealer_card_img = scale_card_img(
            get_image(
                os.path.join(
                    "img",
                    f"{self.dealer_top_card_suit}{self.dealer_top_card_value_str}.png",
                )
            )
        )
        dealer_card_rect = self.screen.blit(
            dealer_card_img,
            (
                screen_width // 2 - card_img_width - spacing // 2,
                dealer_text_rect.bottom + spacing,
            ),
        )

        hidden_card_img = scale_card_img(get_image(os.path.join("img", "Card.png")))
        self.screen.blit(
            hidden_card_img,
            (
                screen_width // 2 + spacing // 2,
                dealer_text_rect.bottom + spacing,
            ),
        )

        player_text = small_font.render("Player", True, white)
        player_text_rect = self.screen.blit(
            player_text, (spacing, dealer_card_rect.bottom + 1.5 * spacing)
        )

        large_font = get_font(os.path.join("font", "Minecraft.ttf"), screen_height // 6)
        player_sum_text = large_font.render(str(player_sum), True, white)
        player_sum_text_rect = self.screen.blit(
            player_sum_text,
            (
                screen_width // 2 - player_sum_text.get_width() // 2,
                player_text_rect.bottom + spacing,
            ),
        )

        if usable_ace:
            usable_ace_text = small_font.render("usable ace", True, white)
            self.screen.blit(
                usable_ace_text,
                (
                    screen_width // 2 - usable_ace_text.get_width() // 2,
                    player_sum_text_rect.bottom + spacing // 2,
                ),
            )
        if self.render_mode == "human":
            pygame.event.pump()
            pygame.display.update()
            self.clock.tick(self.metadata["render_fps"])
        else:
            return np.transpose(
                np.array(pygame.surfarray.pixels3d(self.screen)), axes=(1, 0, 2)
            )