เพิ่มแสตมป์ข้อความลงใน PDF ผ่าน Python

import aspose.pdf as ap
# Open document

pdfDocument = ap.Document()
pdfDocument.pages.add()
# Create text stamp
textStamp = ap.TextStamp("Sample Stamp")
# Set whether stamp is background
textStamp.background = True
# Set origin
textStamp.x_indent = 100
textStamp.y_indent = 100
# Rotate stamp
textStamp.rotate = ap.Rotation.ON90
# Set text properties
textStamp.text_state.font = ap.text.FontRepository.find_font("Arial")
textStamp.text_state.font_size = 14
textStamp.text_state.font_style = ap.text.FontStyles( 
    ap.text.FontStyles.BOLD | ap.text.FontStyles.ITALIC )
textStamp.text_state.foreground_color = ap.Color.aqua
# Add stamp to particular page
pdfDocument.pages[1].add_stamp(textStamp)

# Save output document
pdfDocument.save("AddTextStamp_out.pdf")