Rename files in order, move to a directory

renamer.py

#!/usr/bin/python
import sys, csv, os, shutil

pattern = "Vol09-%04d.jpg"

original_filename = sys.argv[1]
output_path = sys.argv[2]
output_csv = os.path.join(output_path, "original_filenames.csv")

next_index = 0
if os.path.isfile(output_csv):
    with open(output_csv, 'r') as csvfile:
        reader = csv.reader(csvfile)
        for row in reader:
            next_index = int(row[0])
next_index += 1

# move and rename file
new_filename = pattern % (next_index, )
shutil.move(original_filename, os.path.join(output_path, new_filename))

# record what we did
with open(output_csv, 'a') as csvfile:
    writer = csv.writer(csvfile)
    writer.writerow([next_index, new_filename, os.path.basename(original_filename), ])