rename_pdfs.py

#!/usr/bin/python
import sys
import os
from Quartz import PDFDocument
from Foundation import NSURL

if __name__ == '__main__': 
    if len(sys.argv) < 2:
        raise TypeError('Must provide path')

    path = sys.argv[1]
    doit = len(sys.argv) > 2

    files = [ x for x in os.listdir(path) if os.path.isfile(os.path.join(path, x)) ]

    for file in files:
        pdfURL = NSURL.fileURLWithPath_(os.path.join(path, file))
        if not pdfURL:
            continue
        pdfDoc = PDFDocument.alloc().initWithURL_(pdfURL)
        if not pdfDoc:
            continue
        metadata = pdfDoc.documentAttributes()

        newfn = file
        if 'Title' in metadata and 'Author' in metadata:
            title = metadata['Title']
            author = metadata['Author']
            newfn = title + " - " + author + ".pdf"

        elif 'Title' in metadata:
            newfn = metadata['Title'] + '.pdf'

        if newfn != file and len(newfn) > len(file):
            print(newfn)
            if doit:
                try:
                    os.rename(os.path.join(path, file), os.path.join(path, newfn))
                except:
                    print("Unexpected error:", sys.exc_info()[0])
                    print("Skipping " + file)