def truncate_url(url, length=40):
	if len(url) <= length):
		return url
	import re
	pattern = r'(/[^/]+/?)$'
	match = re.search(pattern, url)
	if not match:
		return url
	l = len(match.group(1))
	t_url = url[0:len(url)-l]
	t_url = url[0:length-3]+"..."+match.group(1)
	return t_url