Rectified import error in last commit
import unittest
import rdflib # needed for eval(repr(...)) below
-from rdflib.term import Literal, URIRef, _XSD_DOUBLE, bind, XSD, _XSD_BOOLEAN
+from rdflib.term import Literal, URIRef, _XSD_DOUBLE, bind, _XSD_BOOLEAN
from six import integer_types, PY3, string_types
