รับลายน้ำจาก PDF ผ่าน Python

import aspose.pdf as apdf

from os import path
from io import FileIO

path_infile = path.join(self.data_dir, infile)
path_outfile = path.join(self.data_dir, outfile)

document = apdf.Document(path_infile)

if (
    document.pages[1].artifacts[1].subtype
    == apdf.Artifact.ArtifactSubtype.WATERMARK
):
    image_stream = FileIO(path_outfile, "w")
    document.pages[1].artifacts[1].image.save(image_stream)
    image_stream.flush()
    image_stream.close()