เพิ่มแสตมป์หน้าลงใน PDF ผ่าน Python

import aspose.pdf as apdf


from os import path

path_infile = path.join(self.data_dir, infile)
path_input_stamp = path.join(self.data_dir, "image.pdf")
path_outfile = path.join(self.data_dir, outfile)

document = apdf.Document(path_infile)
bluePageStamp = apdf.PdfPageStamp(path_input_stamp, 1)
bluePageStamp.set_height(800)
bluePageStamp.set_background(True)

plumPageStamp = apdf.PdfPageStamp(path_input_stamp, 2)
plumPageStamp.set_height(800)
plumPageStamp.set_background(True)

for i in range(1, 6):
    if (i % 2 == 0):
        document.pages[i].addStamp(bluePageStamp)
    else:
        document.pages[i].addStamp(plumPageStamp)

document.save(path_outfile)