rename.py

import os
import fnmatch

prefix = "page-"
postfix = ".jpg"

add_num = 1;
digits = 3;

v = []
for filename in os.listdir("."):
	if fnmatch.fnmatch(filename, prefix + "*" + postfix ):
		v.append(filename)

v.reverse()

i = len(v)

format_string = '{0}{2:0' + str(digits) + 'd}{1}'
for filename in v:
	newname = format_string.format(prefix, postfix, i)
	print '{0} -> {1}'.format(filename, newname)
	os.rename( filename, newname )
	#print ()
	i = i - 1;