SystemExit: 2

    usage:  [-h] -Users/bob/Desktop/image.png IMAGE
            [-p PREPROCESS]
    : error: argument -Users/bob/Desktop/image.png/--image is required

ap = argparse.ArgumentParser()
ap.add_argument("-i", "--Users/bob/Desktop/image.png", required=True,
    help="path to input image to be OCR'd")
ap.add_argument("-p", "--preprocess", type=str, default="thresh",
    help="type of preprocessing to be done")
args = vars(ap.parse_args())