Python 3 pdfrw Library Tutorial to Add Watermark to PDF Document Full Project For Beginners

 

 

Welcome folks today in this blog post we will be adding the watermark to pdf document 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

'''
Simple example of watermarking using form xobjects (pdfrw).
usage:   watermark.py [-u] my.pdf single_page.pdf
Creates watermark.my.pdf, with every page overlaid with
first page from single_page.pdf.  If -u is selected, watermark
will be placed underneath page (painted first).
NOTE 1: This program assumes that all pages (including the watermark
        page) are the same size.  For other possibilities, see
        the fancy_watermark.py example.
NOTE 2: At one point, this example was extremely complicated, with
        multiple options.  That only led to errors in implementation,
        so it has been re-simplified in order to show basic principles
        of the library operation and to match the other examples better.
'''

import sys
import os

from pdfrw import PdfReader, PdfWriter, PageMerge

argv = sys.argv[1:]
underneath = '-u' in argv
if underneath:
    del argv[argv.index('-u')]
inpfn, wmarkfn = argv
outfn = 'watermark.' + os.path.basename(inpfn)
wmark = PageMerge().add(PdfReader(wmarkfn).pages[0])[0]
trailer = PdfReader(inpfn)
for page in trailer.pages:
    PageMerge(page).add(wmark, prepend=underneath).render()
PdfWriter(outfn, trailer=trailer).write()

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