将pdf文件转换为新目录中的原始文本

Question

Here is what I'm trying:

import PyPDF2
from PyPDF2 import PdfFileWriter, PdfFileReader

import re
import config
import sys
import os

with open(config.ENCRYPTED_FILE_PATH, mode='rb') as f:
        reader = PyPDF2.PdfFileReader(f)
        if reader.isEncrypted:
            reader.decrypt('Password123')
            print(f"Number of page: {reader.getNumPages()}")

            for i in range(reader.numPages):
                output = PdfFileWriter()
                output.addPage(reader.getPage(i))                
                with open("./pdfs/document-page%s.pdf" % i, "wb") as outputStream:
                    output.write(outputStream)
                    print(outputStream)

                    for page in output.pages: # failing here
                        print page.extractText() # failing here

The entire program is decrypting a large pdf file from one location, and splitting into a separate pdf file per page in new directory -- this is working fine. However, after this I would like to convert each page to a raw .txt file in a new directory. ie /txt_versions/ (for which I'll use later)

Ideally, I can use my current imports, ie PyPDF2 without importing/installing more modules/. Any thoughts?

Answer 1

You have not described how the last two lines are failing, but extract text does not function well on some PDFs:

def extractText(self):

""" Locate all text drawing commands, in the order they are provided in the content stream, and extract the text. This works well for some PDF files, but poorly for others, depending on the generator used. This will be refined in the future. Do not rely on the order of text coming out of this function, as it will change if this function is made more sophisticated. :return: a unicode string object. """

One thing to do is to see if there is text in your pdf. Just because you can see words doesn't mean they have been OCR'd or otherwise encoded in the file as text. Attempt to highlight the text in the pdf and copy/paste it into a text file to see what sort of text can even be extracted.

If you can't get your solution working you'll need to use another package like Tika .