diff -r 9fcc9ae2aebe -r 433174d9394f req.py
--- a/req.py	Wed Mar 17 09:23:27 2010 +0100
+++ b/req.py	Wed Mar 17 11:36:47 2010 +0100
@@ -7,6 +7,7 @@
 """
 __docformat__ = "restructuredtext en"
 
+from warnings import warn
 from urlparse import urlsplit, urlunsplit
 from urllib import quote as urlquote, unquote as urlunquote
 from datetime import time, datetime, timedelta