test_re.py 文件源码

def test_debug_flag(self):
        with captured_stdout() as out:
            re.compile('foo', re.DEBUG)
        self.assertEqual(out.getvalue().splitlines(),
                         ['literal 102 ', 'literal 111 ', 'literal 111 '])
        # Debug output is output again even a second time (bypassing
        # the cache -- issue #20426).
        with captured_stdout() as out:
            re.compile('foo', re.DEBUG)
        self.assertEqual(out.getvalue().splitlines(),
                         ['literal 102 ', 'literal 111 ', 'literal 111 '])