ENH Another Python 3 change is builtins module
ENH Use six.StringIO for PY2/3 compatibility
ENH configparser is another module changed in 3
ENH Do not use print as operator
MIN Remove future division import
ENH Run examples through 2to3
MIN Remove template baggage
ENH Accept most 2to3 changes

These are compatible between 2 and 3
ENH file() is gone in 3: use open()