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parser = argparse.ArgumentParser()
parser.add_argument('input_pdf_path', metavar='PATH')
parser.add_argument('-o', '--output', metavar='out', type=argparse.FileType('wb'),
help='Output PDF file')
parser.add_argument('-s', '--skip', type=int, default=0,
help='Skip over the first n page(s).')
args = parser.parse_args()
args.output.write(img2pdf.convert(*list(map(img2pdf.input_images, images_path))))
这里的 output.write 啥意思? 还有--output?