如何在 python 的 PDF 文件的所有页面中添加水印？

Question

我正在尝试为我的 PDF 的每一页添加水印file.MyPDF 文件有 58 页，但我的输出文件只有最后一页在我的 PDF 文件中。

这是我的代码：

from PyPDF2 import PdfFileReader, PdfFileWriter

watermark_pdf = PdfFileReader("watermark.pdf")
watermark_page = watermark_pdf.getPage(0)
reader = PdfFileReader("original_document.pdf")

for page in reader.pages:
    page.mergePage(watermark_page)
    output = PdfFileWriter()
    output.addPage(page)
    with open("watermarked_document.pdf", "wb") as fp:
        output.write(fp)

请告诉我如何给所有页面加水印。

Answer 1

您正在为每个页面重写 "merged" 文件。

试试

from PyPDF2 import PdfFileMerger, PdfFileReader, PdfFileWriter

pdf_file = "C:/Users/11359023/Desktop/deepfake_vee.pdf"
watermark = "C:/Users/11359023/Desktop/simple.pdf"
merged = "C:/Users/11359023/Desktop/merged.pdf"

with open(pdf_file, "rb") as input_file, open(watermark, "rb") as watermark_file:
    input_pdf = PdfFileReader(input_file)
    watermark_pdf = PdfFileReader(watermark_file)
    watermark_page = watermark_pdf.getPage(0)

    output = PdfFileWriter()

    for i in range(input_pdf.getNumPages()):
        pdf_page = input_pdf.getPage(i)
        pdf_page.mergePage(watermark_page)
        output.addPage(pdf_page)

    with open(merged, "wb") as merged_file:
        output.write(merged_file)

相反。

Answer 2

import PyPDF2

template = PyPDF2.PdfFileReader(open('C:/Users/11359023/Desktop/deepfake_vee.pdf', 'rb'))
watermark = PyPDF2.PdfFileReader(open('C:/Users/11359023/Desktop/simple.pdf', 'rb'))
output = PyPDF2.PdfFileWriter()

for i in range(template.getNumPages()):
  page = template.getPage(i)
  page.mergePage(watermark.getPage(0))
  output.addPage(page)

  with open('C:/Users/11359023/Desktop/merged.pdf', 'wb') as file:
    output.write(file)

Answer 3

我的代码接收作为 cmd promt 参数传入的多个 pdf 文件，将它们合并到 super.pdf，然后在 super.pdf 中的每个页面添加水印，然后将其保存为 [=15] =]

import PyPDF2
import sys

pdf_file_list = sys.argv[1:]
watermark = 'wtr.pdf'
merger = PyPDF2.PdfFileMerger()
writer = PyPDF2.PdfFileWriter()


for file in pdf_file_list:
    merger.append(file)

merger.write('super.pdf')


with open('super.pdf', 'rb') as fileinput:
    pdf_file = PyPDF2.PdfFileReader(fileinput)

    with open(watermark, 'rb') as filewatermark:
        watermark_pdf = PyPDF2.PdfFileReader(filewatermark)

        for page in range(pdf_file.getNumPages()):
            current_pdf_page = pdf_file.getPage(page)
            first_page_watermark = watermark_pdf.getPage(0)
            current_pdf_page.mergePage(first_page_watermark)
            writer.addPage(current_pdf_page)

            with open("watermarked.pdf", 'wb')as file_output:
                writer.write(file_output)

Answer 4

或者如果你有一个包含许多 pdf 的文件夹并且想为所有这些文件添加水印并将它们保存到新文件中，你可以使用它 *假设带有水印的文件名为wtr.pdf，第一页包含水印：

import PyPDF2
import pathlib

path = 'D:\Python\PDF processing' #add your folder path here
folder = pathlib.Path(path).resolve()

for item in folder.iterdir():
    if item.is_file() and item.suffix == '.pdf' and not item.name == 'wtr.pdf':
        with open(f'{item}', 'rb') as file, open('wtr.pdf', 'rb') as wtr:
            input_file_reader = PyPDF2.PdfFileReader(file)  # input file reader
            wtr_reader = PyPDF2.PdfFileReader(wtr)  # watermark reader
            wtr_page = wtr_reader.getPage(0)  # getting the page with the watermark
            output = PyPDF2.PdfFileWriter()  # the output writer

            for i in range(input_file_reader.numPages):  # looping the input reader pages
                page = input_file_reader.getPage(i) # getting pages one by one
                page.mergePage(wtr_page)  # merging each page with the watermark
                output.addPage(page)  # adding the merged page to the output writer

            with open(f'merged_{item.name}', 'wb') as merged_file:
                output.write(merged_file)  # saving to a file from the output writer

如何在 python 的 PDF 文件的所有页面中添加水印？

How to add watermark in all pages of PDF files with python?

python

pypdf2