def remove_watermark(wm_text, inputFile, outputFile):
from PyPDF4 import PdfFileReader, PdfFileWriter
from PyPDF4.pdf import ContentStream
from PyPDF4.generic import TextStringObject, NameObject
from PyPDF4.utils import b_
with open(inputFile, "rb") as f:
source = PdfFileReader(f, "rb")
output = PdfFileWriter()
for page in range(source.getNumPages()):
page = source.getPage(page)
content_object = page["/Contents"].getObject()
content = ContentStream(content_object, source)
for operands, operator in content.operations:
if operator == b_("Tj"):
text = operands[0]
if isinstance(text, str) and text.startswith(wm_text):
operands[0] = TextStringObject('')
page.__setitem__(NameObject('/Contents'), content)
output.addPage(page)
with open(outputFile, "wb") as outputStream:
output.write(outputStream)
wm_text = 'wm_text'
inputFile = r'input.pdf'
outputFile = r"output.pdf"
remove_watermark(wm_text, inputFile, outputFile)