add deprecation warning for Updates

theano/__init__.py

@@ -88,7 +88,7 @@ from printing import \
 import scan_module
 from scan_module import scan, map, reduce, foldl, foldr, clone
 
-from updates import OrderedUpdates
+from updates import Updates, OrderedUpdates
 
 import tensor
 import scalar

theano/updates.py

@@ -13,6 +13,7 @@ from theano.gof.python25 import OrderedDict
 from theano.compile.sharedvalue import SharedVariable
 import logging
 logger = logging.getLogger('theano.updates')
+import warnings
 
 # Must be an OrderedDict or updates will be applied in a non-deterministic order
 class OrderedUpdates(OrderedDict):
@@ -66,3 +67,7 @@ class OrderedUpdates(OrderedDict):
         rval.update(other)
         rval.update(self)
         return rval
+
+def Updates(*key, **kwargs):
+    warnings.warn("Updates is deprecated. Switch to OrderedUpdates.")
+    return OrderedUpdates(*key, **kwargs)