def setUp(self):
skel = GraphSkeleton()
skel.load("unittestdict.txt")
skel.toporder()
nodedata = NodeData.load("unittestdict.txt")
self.instance = DiscreteBayesianNetwork(nodedata)
self.factor = TableCPDFactor("Grade", self.instance)
self.factor2 = TableCPDFactor("Letter", self.instance)
