Merge two PDF files page by page with each other

Make one PDF by sandwiching two PDF files page by page

There was a request at work, so I made it.

** [Prepared file] ** ・ PdfA.pdf ・ PdfB.pdf ・pdf.py

【image】 pdfA.pdf --> pageA-1, pageA-2, pageA-3, ... pdfB.pdf --> pageB-1, PageB-2, pageB-3, ... pdfC.pdf --> pageA-1, pageB-1, pageA-2, pageB-2, pageA-3, pageB-3, ...

【procedure】

Install PyPDF2 library

conda install -c conda-forge pypdf2

Script creation

pdf.py

#! ~/usr/bin/python
# *-# -*- coding: utf-8

import PyPDF2

#File path
pdfA = "pdfA.pdf"
pdfB = "pdfB.pdf"

#Output pdf object
pdf_writer = PyPDF2.PdfFileWriter()

#pdfA open
f_A = open(pdfA, "rb")
pdfA_obj = PyPDF2.PdfFileReader(f_A)

#pdfB open
f_B = open(pdfB, "rb")
pdfB_obj = PyPDF2.PdfFileReader(f_B)

#Insert each PDF page by page. Edit the number of repetitions each time (for now)
for page_num in range(10):
	page_obj = pdfA_obj.getPage(page_num)
	pdf_writer.addPage(page_obj)
	page_obj = pdfB_obj.getPage(page_num)
	pdf_writer.addPage(page_obj)

#ｐｄｆC.Output as pdf
pdf_output = open('pdfC.pdf', 'wb')
pdf_writer.write(pdf_output)
pdf_output.close()

Run

% python pdf.py

from now on The number of pages is automatically acquired and the desired operation is performed without editing the script.