Fix import for GpuSubtensor.

theano/sandbox/cuda/tests/test_basic_ops.py

@@ -915,8 +915,9 @@ class T_Join_and_Split(theano.tensor.tests.test_basic.T_Join_and_Split):
         self.shared = cuda.shared_constructor
 
 
+import theano.tensor.tests.test_subtensor
 # This is to don't duplicate test.
-class T_subtensor(theano.tensor.tests.test_basic.T_subtensor):
+class T_subtensor(theano.tensor.tests.test_subtensor.T_subtensor):
 
     # This prevents nose from printing method docstrings instead of method
     # names
@@ -936,7 +937,7 @@ class T_subtensor(theano.tensor.tests.test_basic.T_subtensor):
            cuda.GpuAdvancedSubtensor1, cuda.GpuAdvancedIncSubtensor1)
 
     def __init__(self, name):
-        return super(theano.tensor.tests.test_basic.T_subtensor,
+        return super(theano.tensor.tests.test_subtensor.T_subtensor,
                      self).__init__(name)
 
     def test_adv_sub1_fast(self):

theano/tensor/subtensor.py

@@ -12,7 +12,7 @@ import theano
 from theano.compat.six import StringIO
 from theano.gradient import DisconnectedType
 from theano import gof
-from theano.gof import Apply, Constant, hashtype, Op, Type
+from theano.gof import Apply, Constant, hashtype, Op, Type, MethodNotDefined
 from theano.gof.python25 import maxsize
 from theano.printing import pprint
 from theano import scalar as scal