问使用Python从PDF所有页面和输出文件中提取文本

EN

import PyPDF2
with open('sample.pdf','rb') as pdf_file, open('sample.txt', 'w') as text_file:
    read_pdf = PyPDF2.PdfFileReader(pdf_file)
    number_of_pages = read_pdf.getNumPages()
    for page_number in range(number_of_pages):   # use xrange in Py2
        page = read_pdf.getPage(page_number)
        page_content = page.extractText()
        text_file.write(page_content)

df_dir = "D:/search/pdf"
txt_dir = "D:/pdf_to_text"


corpus = (f for f in os.listdir(pdf_dir) if not f.startswith('.') and isfile(join(pdf_dir, f)))
pdfWriter = PyPDF2.PdfFileWriter()


for filename in corpus:

    pdf = open(join(pdf_dir, filename),'rb')
    pdfReader = PyPDF2.PdfFileReader(pdf)


    for page in range(1, pdfReader.numPages):
        pageObj = pdfReader.getPage(page)
        pdfWriter.addPage(pageObj)

        text = pageObj.extractText()


        page_name = "{}-page{}.txt".format(filename[:4], page + 1)

        with open(join(txt_dir, page_name), mode="w", encoding='UTF-8') as o:
            o.write(text)

    def getPptContent(path, text):
        pdfWriter = PyPDF2.PdfFileWriter()
        pdf = open(join(pdf_dir, filename),'rb')
        pdfReader = PyPDF2.PdfFileReader(pdf)
        for page in range(1, pdfReader.numPages):
        pageObj = pdfReader.getPage(page)
        pdfWriter.addPage(pageObj)
        text = pageObj.extractText()
  return text

  pdf_dir = "pdf_directory name"
  corpus = [str(f) for f in os.listdir(pdf_dir) if not f.startswith('.') and 
            isfile(join(pdf_dir, f))]

 for filename in corpus:
   Path = pdf_dir + "/" +filename
   print(Path)
   file_content = getPptContent(Path)
   f = open(pdf_dir + "/output/" + filename.split(".")[0]  +".txt" ,"w+", 
       encoding="utf-8")
   f.write(str(file_content))
   f.close()