remove watermark from wowebooks (fuck those guys)

bookFix.py

import os
from PyPDF2 import PdfFileReader, PdfFileWriter
from PyPDF2.generic import NameObject, NullObject

"""
This Script overwrites the Watermark which is embedded as a Form on each page with a NullObject
Requires PyPDF2 (> python -m pip install pypdf2)
"""

def remove_wow_watermark(inputFile):
	fileName, fileExt = os.path.splitext(inputFile)
	outFile = fileName + '.strip' + fileExt
	source = PdfFileReader(open(inputFile, "rb"))
	output = PdfFileWriter()
	# For each page
	for i in range(source.getNumPages()):
		# Get the current page and it's contents
		# Path = /Page/Resources/XObject/Fm0 => Stream
		page = source.getPage(i)
		page_resources_obj = page['/Resources'].getObject()
		page_resources_xobject_obj = page_resources_obj['/XObject'].getObject()
		page_resources_xobject_obj.__setitem__(NameObject('/Fm0'), NullObject())
		page.__setitem__(NameObject('/Resources'), page_resources_obj)
		output.addPage(page)
	outputStream = open(outFile, "wb")
	output.write(outputStream)
  
# Put your file here and execute the script in the directory with the book.
remove_wow_watermark('watermarked.pdf')