def verify_valid_flag(self, cmd_line):
        data = self.start_python(cmd_line)
        self.assertTrue(data == '' or data.endswith('\n'), repr(data))
        self.assertTrue(data not in 'Traceback')
dataset/ETHPy150Open babble/babble/include/jython/Lib/test/test_cmd_line.py/CmdLineTest.verify_valid_flag/swapped operands of `not in`