--- date.py.orig	2004-07-03 16:20:09.000000000 +0200
+++ date.py	2004-07-03 15:32:13.000000000 +0200
@@ -121,8 +121,8 @@
         if type(spec) == type(''):
             self.set(spec, offset=offset, add_granularity=add_granularity)
             return
-        elif hasattr(spec, 'tuple'):
-            spec = spec.tuple()
+	elif isinstance(spec, Date) :
+            spec = spec.get_tuple()
         try:
             y,m,d,H,M,S,x,x,x = spec
             frac = S - int(S)