第一次做人脸识别遇到以下问题，请问如何解析命令行呢？（麻烦详细一点，纯小白）

ap = argparse.ArgumentParser()
ap.add_argument("-i", "--dataset", required=True,
   help="path to input directory of faces + images")
ap.add_argument("-e", "--embeddings", required=True,
   help="path to output serialized db of facial embeddings")
ap.add_argument("-d", "--detector", required=True,
   help="path to OpenCV's deep learning face detector")
ap.add_argument("-m", "--embedding-model", required=True,
   help="path to OpenCV's deep learning face embedding model")
ap.add_argument("-c", "--confidence", type=float, default=0.5,
   help="minimum probability to filter weak detections")
args = vars(ap.parse_args())

error: the following arguments are required: -i/--dataset, -e/--embeddings, -d/--detector, -m/--embedding-model

执行这个文件时要带参数   python xxx.py -i dataset_path -e embeddings_path -d .....