Remove 2to3 invocation in setup

pymbolic/parser.py

-from __future__ import division
-from __future__ import absolute_import
+from __future__ import division, absolute_import
 
 __copyright__ = "Copyright (C) 2009-2013 Andreas Kloeckner"
 
@@ -24,6 +23,7 @@ THE SOFTWARE.
 """
 
 import pytools.lex
+from six.moves import intern
 
 _imaginary = intern("imaginary")
 _float = intern("float")

pymbolic/polynomial.py

 from __future__ import division
 from __future__ import absolute_import
 from __future__ import print_function
-from six.moves import range
+from six.moves import range, intern
 
 __copyright__ = "Copyright (C) 2009-2013 Andreas Kloeckner"
 

pymbolic/primitives.py

 from __future__ import division
 from __future__ import absolute_import
+from six.moves import intern
 
 __copyright__ = "Copyright (C) 2009-2013 Andreas Kloeckner"
 

pymbolic/rational.py

-from __future__ import division
-from __future__ import absolute_import
-from __future__ import print_function
+from __future__ import division, absolute_import, print_function
 
 __copyright__ = "Copyright (C) 2009-2013 Andreas Kloeckner"
 
@@ -24,6 +22,7 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 """
 
+from six.moves import intern
 import pymbolic.primitives as primitives
 import pymbolic.traits as traits
 

setup.py

@@ -3,12 +3,6 @@
 
 from setuptools import setup
 
-try:
-    from distutils.command.build_py import build_py_2to3 as build_py
-except ImportError:
-    # 2.x
-    from distutils.command.build_py import build_py
-
 ver_dic = {}
 version_file = open("pymbolic/version.py")
 try:
@@ -55,7 +49,4 @@ setup(name="pymbolic",
           "pytools>=2",
           "pytest>=2.3",
           "six",
-          ],
-
-      # 2to3 invocation
-      cmdclass={'build_py': build_py})
+          ])