remove.py

from pypdf import PdfReader, PdfWriter

def removeWatermark(input_fname: str, output_fname: str):

    with open(input_fname, "rb") as input_file:

        reader = PdfReader(input_file)
        writer = PdfWriter()

        for n in range(len(reader.pages)):

            page = reader.pages[n]
            del page["/Contents"][-1]

            writer.add_page(page)

    with open(output_fname, "wb") as output_file:

        writer.write(output_file)

if __name__ == "__main__":

    import sys

    if len(sys.argv) == 2:
        removeWatermark(sys.argv[1], sys.argv[1])
    elif len(sys.argv) == 3:
        removeWatermark(sys.argv[1], sys.argv[2])
    else:
        raise RuntimeError("Wrong number of arguments!")