changes according to PEP8

theano/sparse/sandbox/sp.py

@@ -256,22 +256,24 @@ class EnsureSortedIndices(Op):
     """
 
     def __init__(self, inplace):
-        self.inplace=inplace
+        self.inplace = inplace
         if self.inplace:
             self.view_map = {0:[0]}
 
     def make_node(self, x):
         return gof.Apply(self, [x], [x.type()])
 
-    def perform(self,node, (x,), (z,)):
+    def perform(self, node, inputs, output_storage):
+        x = inputs[0]
+        z = output_storage[0]
         if self.inplace:
             x.sort_indices()
             z[0] = x
         else:
             z[0] = x.sorted_indices()
 
-    def grad(self, (x,), (gz,)):
-        return [gz]
+    def grad(self, inputs, output_grad):
+        return [output_grad[0]]
 
     def infer_shape(self, node, i0_shapes):
         return i0_shapes

theano/sparse/sandbox/test_sp.py

@@ -413,7 +413,7 @@ def test_diagonal():
 
         assert numpy.all(n == f(range(K)).toarray())
 
-def test_EnsureSortedIndices():
+def test_ensure_sorted_indices():
     x = 2000
     y = 2000
     sparsity = 1000