เพิ่มแสตมป์หน้าลงใน PDF ผ่าน Python

import aspose.pdf as ap
# Open document
dataDir = "..."
inputFileName = "sample-4pages.pdf"
outputFileName = "AddPageStamp_out.pdf"
pageStampFileName = "PageStamp.pdf"

pdfDocument = ap.Document(dataDir + inputFileName)
bluePageStamp = ap.PdfPageStamp(dataDir + pageStampFileName, 1)
bluePageStamp.set_height(800)
bluePageStamp.set_background(True)

plumPageStamp = ap.PdfPageStamp(dataDir + pageStampFileName, 2)
plumPageStamp.set_height(800)
plumPageStamp.set_background(True)

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

pdfDocument.save(dataDir + outputFileName)