Fix python 3 syntax error

package.json

@@ -90,7 +90,7 @@
         "c9.ide.imgeditor": "#612e75ef4f",
         "c9.ide.immediate": "#a962119bec",
         "c9.ide.installer": "#0fde9f0067",
-        "c9.ide.language.python": "#ceb5df1c74",
+        "c9.ide.language.python": "#2f9a6accbe",
         "c9.ide.mount": "#b9a5a2d45c",
         "c9.ide.navigate": "#38ae100ea1",
         "c9.ide.newresource": "#981a408a7b",