fix DeepCopyOp.__eq__ and __hash__ fct.

theano/compile/function_module.py

@@ -170,6 +170,12 @@ class DeepCopyOp(theano.gof.Op):
     def __str__(self):
         return self.__class__.__name__
 
+    def __hash__(self):
+        return hash(type(self))
+
+    def __eq__(self, other):
+        return type(self) == type(other)
+
     def make_node(self, x):
         return theano.gof.Apply(self, [x], [x.type()])