Getting Type Error when trying to read the individual values in an Image. Trying to use len() function to get my loop going

Question

        im = ImageGrab.grab(bbox=(1367, 845, 1485,863))
        im.save(f\'im_4_\' + str(int(time.time())) + \'.png\', \'PNG\')
       
        y = Image.Image.getco