def exportValue(self, vf, value):
        m = StrStrHashMap(value)
        keysAndValues = []
        for i in m.keys():
            keysAndValues.append(i)
            keysAndValues.append(m[i])
def getLenp2(self):
        p1 = self.p1
        ret = p1.distance(self.p3)
        return ret