use imported function get_idx_list consistently instead of sometimes…

theano/tensor/opt.py

@@ -830,8 +830,7 @@ class ShapeFeature(object):
             # The current Subtensor always put constant index in the graph.
             # This was not True in the past. So call the Subtensor function
             # that will return the right index.
-            idx = theano.tensor.subtensor.get_idx_list(s_i.owner.inputs,
-                                                       s_i.owner.op.idx_list)
+            idx = get_idx_list(s_i.owner.inputs, s_i.owner.op.idx_list)
             assert len(idx) == 1
             idx = idx[0]
             try:
@@ -1865,8 +1864,7 @@ def local_useless_inc_subtensor(node):
 
     # Check that we keep all the original data.
     # Put the constant inputs in the slice.
-    idx_cst = theano.tensor.subtensor.get_idx_list(node.inputs[1:],
-                                                   node.op.idx_list)
+    idx_cst = get_idx_list(node.inputs[1:], node.op.idx_list)
     if all(isinstance(e, slice) and e.start is None and
            e.stop is None and (e.step is None or T.extract_constant(e.step) == -1)
            for e in idx_cst):
@@ -2358,7 +2356,7 @@ def local_subtensor_of_dot(node):
     a = node.inputs[0].owner.inputs[0]
     b = node.inputs[0].owner.inputs[1]
 
-    idx_list = theano.tensor.subtensor.get_idx_list(node.inputs, node.op.idx_list)
+    idx_list = get_idx_list(node.inputs, node.op.idx_list)
 
     num_a_indices = min(a.ndim - 1, len(idx_list))
     a_indices = idx_list[:num_a_indices]