python编程快速上手之第13章实践项目参考答案(13.6.1) - flying-wyf

python编程快速上手之第13章实践项目参考答案(13.6.1)

import os,PyPDF2
os.chdir(\'D:\\My Documents\')
for folderName, subfolders, filenames in os.walk(\'D:\\My Documents\'):
  for file in filenames:
    if file.endswith(\'.pdf\'):
       pdfFile = open(file, \'rb\')
       pdfReader = PyPDF2.PdfFileReader(pdfFile)
       pdfWriter = PyPDF2.PdfFileWriter()
       for pageNum in range(pdfReader.numPages):
         pdfWriter.addPage(pdfReader.getPage(pageNum))
       pdfWriter.encrypt(\'123456\')
       resultPdf = open(file +\'encrypted.pdf\', \'wb\')
       pdfWriter.write(resultPdf)
       resultPdf.close()