How to update image file realtime Pygame?

Question

I import an image from file and that file always updates (always save the new picture in the same file name) and now when that image change in file My GUI not update must change page or do something that image will change I mean change on display. But I would like image change on display in real-time (change every time when an image in the file change)

And I write code like this :

def first():

    # crop
    img_crop = mpimg.imread('Crop.jpg')
    #img_crop = numpy.load('bur.npy')
    x = numpy.arange(10)
    y = numpy.arange(20)
    X, Y = numpy.meshgrid(x, y)
    img_crop_re = cv2.resize(img_crop, dsize=(200,200), interpolation=cv2.INTER_CUBIC)
    img_crop_ro = cv2.rotate(img_crop_re, cv2.ROTATE_90_COUNTERCLOCKWISE)
    img_crop_flip = cv2.flip(img_crop_ro,0)
    surf_crop = pygame.surfarray.make_surface(img_crop_flip)

    # mask
    img_mask = mpimg.imread('mask.jpg')
    #img_mask = numpy.load('bur.npy')
    x = numpy.arange(10,50)
    y = numpy.arange(20,50)
    X, Y = numpy.meshgrid(x, y)
    img_mask_re = cv2.resize(img_mask, dsize=(200, 200), interpolation=cv2.INTER_CUBIC)
    img_mask_ro = cv2.rotate(img_mask_re, cv2.ROTATE_90_COUNTERCLOCKWISE)
    img_mask_flip = cv2.flip(img_mask_re,0)
    surf_mask = pygame.surfarray.make_surface(img_mask_flip)


    running = True
    while running:
        screen.fill((30,30,30))

        screen.blit(surf_crop, (850, 360))
        screen.blit(surf_mask, (1170, 360))
       
        ...

        pygame.display.flip()
        pygame.display.update()
        mainClock.tick(60)

Answer 1

Put the code that loads the image into the while loop so the image is repeatedly updated. This could slow down your program though. With this method, make sure the image name and position is exactly the same.