text: import sys
  import argparse
  from yolo import YOLO, detect_video
  from PIL import Image
  import time
  
  def detect_img(yolo):
      '''加载模型后，持续检测输入的图像
      @paras:yolo是配置好的YOLO类的实例
      '''
      while True:
          img = input('Input image filename:')
          try:
              image = Image.open(img)
          except:
              print('Open Error! Try again!')
              continue
          else:
              tic=time.time()
              r_image = yolo.detect_image(image)
              toc=time.time()
              print("cost time:",toc-tic)
              r_image.show()
      yolo.close_session()
  
  FLAGS = None
  
  if __name__ == '__main__':
      # class YOLO defines the default value, so suppress any default here
      parser = argparse.ArgumentParser(argument_default=argparse.SUPPRESS)
      '''
      Command line options
      '''
      parser.add_argument('--model', type=str, default='logs/004/trained_weights_stage_1.h5',
                          help='path to model weight file, default ' + YOLO.get_defaults("model_path"))
      parser.add_argument('--anchors', type=str,
                          help='path to anchor definitions, default ' + YOLO.get_defaults("anchors_path"))
      parser.add_argument('--classes', type=str, default='model_data/nwpu_classes.txt',
                          help='path to class definitions, default ' + YOLO.get_defaults("classes_path"))
      parser.add_argument('--gpu_num', type=int, default=1,
                          help='Number of GPU to use, default ' + str(YOLO.get_defaults("gpu_num")))
      parser.add_argument('--image', default=True, action="store_true",
                          help='Image detection mode, will ignore all positional arguments')
      '''
      Command line positional arguments -- for video detection mode
      '''
      parser.add_argument("--input", nargs='?', type=str,required=False,default='./path2your_video',
          help = "Video input path")
      parser.add_argument("--output", nargs='?', type=str, default="",
          help = "[Optional] Video output path")
  
      FLAGS = parser.parse_args()
  
      print("debug:",FLAGS.image)
      if FLAGS.image: #如果image设置为True,则检测图像
          """
          Image detection mode, disregard any remaining command line arguments
          """
          print("Image detection mode")
          if "input" in FLAGS:
              print(" Ignoring remaining command line arguments: " + FLAGS.input + "," + FLAGS.output)
          detect_img(YOLO(**vars(FLAGS)))
  
      elif "input" in FLAGS: #检测视频
          detect_video(YOLO(**vars(FLAGS)), FLAGS.input, FLAGS.output)
      else:
          print("Must specify at least video_input_path.  See usage with --help.")