For compat add TensorType.context_name='cpu'

theano/tensor/type.py

@@ -34,7 +34,7 @@ class TensorType(Type):
         Optional name for this type.
 
     """
-
+    context_name = 'cpu'
     filter_checks_isfinite = False
     """
     When this is True, strict filtering rejects data containing NaN or