How to Display Text in Pygame

 You can render the text either with the render method similarly to the old pygame.font.Font.render or directly onto the target surface with render_to. There's also the pygame.freetype module which is more modern, works with more fonts and offers additional functionality. Create a font object with pygame.freetype.SysFont() or pygame.freetype.Font if the font is inside of your game directory. 

    import pygame

    import pygame.freetype  # Import the freetype module.

    pygame.init()

    screen = pygame.display.set_mode((800, 600))

    GAME_FONT = pygame.freetype.Font("KhmerOsMoul.ttf", 24)

    running =  True

    while running:

        for event in pygame.event.get():

            if event.type == pygame.QUIT:

                running = False

        screen.fill((255,255,255))

        # You can use `render` and then blit the text surface ...

        text_surface, rect = GAME_FONT.render("Hello World!", (0, 0, 0))

        screen.blit(text_surface, (40, 250))

        # or just `render_to` the target surface.

        GAME_FONT.render_to(screen, (40, 350), "Hello World!", (0, 0, 0))

        pygame.display.flip()

    pygame.quit()