new_contents: import numpy as np
  import cv2
  from video import create_capture
  
  if __name__ == '__main__':
      import sys, getopt
      
      args, video_src = getopt.getopt(sys.argv[1:], '', ['cascade=', 'nested-cascade='])
      try: video_src = video_src[0]
      except: video_src = '0'
      cascade_fn = args.get('--cascade', "../../data/haarcascades/haarcascade_frontalface_alt.xml")
      nested_fn  = args.get('--nested-cascade', "../../data/haarcascades/haarcascade_eye.xml.xml")
  
  
      cam = create_capture(video_src)
  
      while True:
          ret, img = cam.read()
          cv2.imshow('facedetect', img)
  
          if cv2.waitKey(5) == 27:
              break
  
  
subject: work on facedetect sample