diff -r 4792a1bb72a9 -r 26387b836099 server/sources/ldapuser.py
--- a/server/sources/ldapuser.py	Mon Mar 09 12:12:53 2009 +0100
+++ b/server/sources/ldapuser.py	Tue Mar 10 11:35:52 2009 +0100
@@ -20,7 +20,7 @@
 FOR A PARTICULAR PURPOSE.
 """
 
-from mx.DateTime import now, DateTimeDelta
+from datetime import datetime, timedelta
 
 from logilab.common.textutils import get_csv
 from rql.nodes import Relation, VariableRef, Constant, Function
@@ -53,16 +53,16 @@
 class TimedCache(dict):
     def __init__(self, ttlm, ttls=0):
         # time to live in minutes
-        self.ttl = DateTimeDelta(0, 0, ttlm, ttls)
+        self.ttl = timedelta(0, ttlm*60 + ttls, 0)
         
     def __setitem__(self, key, value):
-        dict.__setitem__(self, key, (now(), value))
+        dict.__setitem__(self, key, (datetime.now(), value))
         
     def __getitem__(self, key):
         return dict.__getitem__(self, key)[1]
     
     def clear_expired(self):
-        now_ = now()
+        now_ = datetime.now()
         ttl = self.ttl
         for key, (timestamp, value) in self.items():
             if now_ - timestamp > ttl: