Secret Message

import os
import re

def listImagesStartingWithNumbers(folder):
    filtered_files = []
    for fn in os.listdir(folder):
        if re.search('^\d+.+\.jpg$', fn) != None:
            filtered_files.append(fn)
    return filtered_files

def removePrefixNumbers(text):
    return re.sub('^\d+', '', text)

def revealSecretMessage(folder):
    curr_folder = os.getcwd()
    os.chdir(folder)
    for fn in listImagesStartingWithNumbers(folder):
        os.rename(fn, removePrefixNumbers(fn))
        print "File: " + fn + " renamed to: " + removePrefixNumbers(fn)
    os.chdir(curr_folder)

#print listImagesStartingWithNumbers(r"C:\secret_message\images")
#print removePrefixNumbers("123 file 123 name.jpeg")
revealSecretMessage(r"C:\secret_message\images")