def open_from_xml(self, filename, vtType, tree=None):
        if tree is None:
            tree = self.parse_xml_file(filename)
        vistrail = self.read_xml_object(vtType, tree.getroot())
        return vistrail
Test that an Exception is raised when the Boolean write operation fails
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/db/versions/v0_9_4/persistence/__init__.py/DAOList.open_from_xml--crossover with--dataset/ETHPy150Open OpenKMIP/PyKMIP/kmip/tests/unit/core/primitives/test_boolean.py/TestBoolean.test_write_bad_value