def _parse_list(self, liststr):
        liststr = liststr[1:2-len(liststr)]
        return set([s.strip("'") for s in liststr.split(', ') if s.strip()])
dataset/ETHPy150Open OpenMDAO/OpenMDAO-Framework/openmdao.main/src/openmdao/main/test/test_connect_var.py/VariableTestCase._parse_list/swapped operands of `-`