ImportError: No module named xmlrpc_client

[JuanChuncho]

Traceback (most recent call last):
File "Natural_gas_version_5.py", line 10, in
from pyomo.environ import *
File "/Library/Python/2.7/site-packages/pyomo/environ/init.py", line 71, in
_import_packages()
File "/Library/Python/2.7/site-packages/pyomo/environ/init.py", line 68, in _import_packages
pkg.load()
File "/Library/Python/2.7/site-packages/pyomo/neos/plugins/init.py", line 13, in load
import pyomo.neos.plugins.kestrel_plugin
File "/Library/Python/2.7/site-packages/pyomo/neos/plugins/kestrel_plugin.py", line 15, in
from six.moves.xmlrpc_client import ProtocolError
ImportError: No module named xmlrpc_client

I am running masOS Sierra.
How can I fix
Thanks for getting back to me.