extension of #3983

theano/scalar/tests/test_basic.py

@@ -9,6 +9,7 @@ If you do want to rewrite these tests, bear in mind:
   * FunctionGraph and DualLinker are old, use compile.function instead.
 """
 
+from __future__ import division
 import unittest
 import numpy as np
 

theano/scan_module/tests/test_scan.py

-from __future__ import print_function
+from __future__ import print_function, division
 import os
 import shutil
 import sys

theano/tensor/xlogx.py

+from __future__ import division
 import numpy
-
 from theano.tensor.elemwise import Elemwise
 from theano import scalar
 
@@ -54,7 +54,7 @@ class XlogY0(scalar.BinaryScalarOp):
     def grad(self, inputs, grads):
         x, y = inputs
         gz, = grads
-        return [gz * scalar.log(y), gz * x / y]
+        return [gz * scalar.log(y), gz * x/y]
 
     def c_code(self, node, name, inputs, outputs, sub):
         x, y = inputs