Scanned page to PDF converter

OK, so here's a first code snippet that I found useful. A scan utility that I used gave me a bunch of A4 images in folders, one image per page. I wanted to convert these scanned pages into PDF documents. The excellent reportlab package allows the creation of PDFs from Python; the rest was just globbing and glueing.

The script assumes that each subfolder in the current (or specified) path contains a collection of images that should be converted into a single PDF. It also assumes that the images are named in such a way that sorting by filename will place the pages in the correct order. For each subfolder, a similarly named PDF is created in the main folder.

#!/usr/bin/python

from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import A4
import os, sys, glob

width, height = A4

if len(sys.argv) > 1:
 try:
   os.chdir(sys.argv[1]) # Change working directory
 except:
   print "Usage: pics2pdf [directory]"
   exit()

# Iterate over all the subdirectories of the current directory:
for subdir in filter(os.path.isdir, os.listdir('.')):

 pdfname = subdir+".pdf"
 ignorelist = []
 print "Processing", pdfname, "[",
 sys.stdout.flush()
 c = canvas.Canvas(pdfname)

 # Iterate over all the possible pictures in the subdirectory:
 PicList = glob.glob(os.path.join(subdir,"*"))
 PicList.sort()

 for pic in PicList:

   try: # Assume the file is a valid image
     c.drawImage(pic, 0, 0, width, height)
     c.showPage()
     print os.path.basename(pic),
     sys.stdout.flush()
   except: # Didn't seem to be an image
     ignorelist.append(os.path.basename(pic))

   print "]"

   if len(ignorelist) > 0:
   print "Ignored non-image file(s)",
   for file in ignorelist:
     print file,
   print ""

 c.save()