Welcome folks today in this blog post we will be concatenating multiple pages into one pdf file in python using pdfrw library . All the full source code of the application is shown below.

Get Started

In order to get started you need to install the below library using the pip command as shown below

pip install pdfrw

After installing this library you need to make an app.py file and copy paste the following code

app.py

#!/usr/bin/env python

'''
usage:   4up.py my.pdf
Creates 4up.my.pdf with a single output page for every
4 input pages.
'''

import sys
import os

from pdfrw import PdfReader, PdfWriter, PageMerge


def get4(srcpages):
    scale = 0.5
    srcpages = PageMerge() + srcpages
    x_increment, y_increment = (scale * i for i in srcpages.xobj_box[2:])
    for i, page in enumerate(srcpages):
        page.scale(scale)
        page.x = x_increment if i & 1 else 0
        page.y = 0 if i & 2 else y_increment
    return srcpages.render()


inpfn, = sys.argv[1:]
outfn = '4up.' + os.path.basename(inpfn)
pages = PdfReader(inpfn).pages
writer = PdfWriter(outfn)
for index in range(0, len(pages), 4):
    writer.addpage(get4(pages[index:index + 4]))
writer.write()

Now to run this python file we need to run the below command

python app.py test.pdf