new_contents: #!/usr/bin/python2
  import sys
  import png
  
  if len(sys.argv) < 2:
  	print("No Input!")
  	sys.exit(0)
  
  threshold=8
  
  
  def diff(a, b):
          return abs(a-b) > threshold
  
  def average(values):
           return sum(values, 0.0) / len(values)
  
  png_pixels=png.Reader(filename=sys.argv[1]).read_flat()[2]
  current = []
  pixels = []
  for i,pix in enumerate(png_pixels):
          current.append(pix)
          if not (i%3 == 2): continue
          pixels.append(current)
          current = []
  r,g,b = zip(*pixels)
  
  baseline = [average(r), average(g), average(b)]
  
  same = 0
  different = 0
  
  for pix in pixels:
          if any((diff(pix[0],baseline[0]), diff(pix[1], baseline[1]), diff(pix[2], baseline[2]))):
                  different += 1
          else:
                  same += 1
  
  diversity = float((len(pixels)-same))/len(pixels)
  print("{} {} {} {}".format(sys.argv[1], same, different, int(diversity > 0.05)))
  
  sys.exit(int(diversity <= 0.05))
  
  
subject: add a python script that can detect nondescript images