pdf_rename.py

from PyPDF2 import PdfFileReader
import sys
from os import listdir, rename
from os.path import join

scan_dir = sys.argv[1]
files = [join(scan_dir, fn) for fn in listdir(scan_dir)]
for fn in listdir(scan_dir):
    if fn[-4:] == ".pdf":
        with open(join(scan_dir, fn), mode="rb") as f:
            pdfparser = PdfFileReader(f)
            doc_info = pdfparser.getDocumentInfo()
            title = doc_info.get("/Title", None)
            if title:
                new_fn = title + ".pdf"
                print(fn + " -> " + new_fn)
                # rename(join(scan_dir, fn), join(scan_dir, new_fn))
            else:
                print(fn + " FAIL")