doctest_driver.py 文件源码

def _check_output(self, example):
        want = example.want
        optionflags = self._get_optionflags(example)
        got = sys.stdout.getvalue()
        sys.stdout.truncate(0)
        if not self.checker.check_output(want, got, optionflags):
            self.runner.report_failure(self.save_stdout.write, 
                                       self.test, example, got)
            return False
        else:
            return True