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#!/usr/bin/env python3
# USAGE: ./add_on_page_with_pdfrw.py src_file.pdf dest_file.pdf
import sys
from fpdf import FPDF
from pdfrw import PageMerge, PdfReader, PdfWriter
from pdfrw.pagemerge import RectXObj
IN_FILEPATH = sys.argv[1]
OUT_FILEPATH = sys.argv[2]
ON_PAGE_INDEX = 1
# if True, new content will be placed underneath page (painted first):
UNDERNEATH = False
reader = PdfReader(IN_FILEPATH)
area = RectXObj(reader.pages[0])
def new_content():
fpdf = FPDF(format=(area.w, area.h), unit="pt")
fpdf.add_page()
fpdf.set_font("helvetica", size=36)
fpdf.text(50, 50, "Hello!")
reader = PdfReader(fdata=bytes(fpdf.output()))
return reader.pages[0]
writer = PdfWriter()
writer.pagearray = reader.Root.Pages.Kids
if writer.pagearray[0].Kids:
writer.pagearray = writer.pagearray[0].Kids
PageMerge(writer.pagearray[ON_PAGE_INDEX]).add(
new_content(), prepend=UNDERNEATH
).render()
writer.write(OUT_FILEPATH)
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