python模块推荐【】pypdf2自动添加水印

需求场景

为多个pdf文件自动添加水印。

实战代码

准备文件，创建一页带有水印的pdf文件。

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# !/usr/bin/python
# Adding a watermark to a single-page PDF

import PyPDF2
from glob import glob 


input_file = "example.pdf"
output_file = "example-drafted.pdf"
watermark_file = "draft.pdf"


def addwatermark(inputf,watermark,outf=""):
    '''
    '''
    print("convert the file %s to watermaped file"%inputf)
    pdf_writer = PyPDF2.PdfFileWriter()

    if not outf:
        outf=inputf.replace(".pdf","_mark.pdf")
    
    fh_in = open(input_file, "rb") 
    pdf = PyPDF2.PdfFileReader(fh_in)

    fh_wm = open(watermark_file, "rb") 
    watermark = PyPDF2.PdfFileReader(fh_wm)
    first_page_watermark = watermark.getPage(0)





    for i in range(pdf.getNumPages()):
        page=pdf.getPage(i)
        page.mergePage(first_page_watermark)
        pdf_writer.addPage(page)


        
    with open(outf, "wb") as filehandle_output:
        # write the watermarked file to the new file
        pdf_writer.write(filehandle_output)
    print("finished")



if __name__ == '__main__':
    input_file = "example.pdf"
    output_file = "example-drafted.pdf"
    watermark_file = "draft.pdfi.watermap"
    #addwatermark(input_file ,watermark_file,output_file)

    pdffiles = glob("*.pdf")
    watermark_file = "draft.pdf.watermap"
    for input_file in pdffiles:
        addwatermark(input_file ,watermark_file)