Better name. Otherwise, we don't know if this is a None instance or Theano obj

theano/tensor/type_other.py

@@ -66,10 +66,9 @@ class NoneTypeT(Generic):
         else:
             raise TypeError('Expected None!')
 
-    def __str__(self):
-        return "None"
+none_type_t = NoneTypeT()
 
 # This is a variable instance. It can be used only once per fgraph.
 # So use NoneConst.clone() before using it in a Theano graph.
 # Use NoneConst.equal(x) to check if two variable are NoneConst.
-NoneConst = Constant(NoneTypeT(), None, name='None')
+NoneConst = Constant(NoneTypeT(), None, name='NoneConst')