Fix test in python 3.

theano/sandbox/cuda/tests/test_type.py

 import cPickle
+import os.path
+import sys
+
 from nose.tools import assert_raises
 import numpy
-import os.path
+
 from theano import config
 from theano.sandbox.cuda import cuda_available
 
@@ -23,7 +26,11 @@ def test_unpickle_cudandarray_as_numpy_ndarray_flag0():
 
     try:
         testfile_dir = os.path.dirname(os.path.realpath(__file__))
-        with open(os.path.join(testfile_dir, 'CudaNdarray.pkl')) as fp:
+        fname = 'CudaNdarray.pkl'
+        if sys.version_info.major == 3:
+            fname = 'CudaNdarray_py3.pkl'
+
+        with open(os.path.join(testfile_dir, fname), 'rb') as fp:
             if cuda_available:
                 mat = cPickle.load(fp)
             else: