rename files in folder by date created

renameFiles.py

import datetime
import os

dir = os.getcwd() + '/'
for filename in os.listdir(dir):
	newName = datetime.datetime.fromtimestamp(os.path.getmtime(dir + filename)).strftime('%Y%m%d-%H%M%S') + os.path.splitext(filename)[1]
	print('rename: ' + filename + ' -> ' + newName)
	os.rename(dir + filename, dir + newName)
print('done!')