Fixed test that only worked in Python2.7

theano/tests/test_dictionary_output.py

@@ -151,13 +151,13 @@ class dictionary_output_checker(unittest.TestCase):
             pass
 
         try:
-            theano.function([x], outputs={1.0: x, "a": x**2})
+            theano.function([x], outputs={1.0: x, 2.0: x**2})
             raise Exception("Did not throw exception with 1.0 as one key")
         except AssertionError:
             pass
 
         try:
-            theano.function([x], outputs={("a", "b"): x, "a": x**2})
-            raise Exception("Did not throw exception with tuple as one key")
+            theano.function([x], outputs={("a", "b"): x, 1.0: x**2})
+            raise Exception("Did not throw exception with tuple as key")
         except AssertionError:
             pass