test_pep352.py 文件源码

def test_catch_string(self):
        # Catching a string should trigger a DeprecationWarning.
        with warnings.catch_warnings():
            warnings.resetwarnings()
            warnings.filterwarnings("error")
            str_exc = "spam"
            with self.assertRaises(DeprecationWarning):
                try:
                    raise StandardError
                except str_exc:
                    pass

            # Make sure that even if the string exception is listed in a tuple
            # that a warning is raised.
            with self.assertRaises(DeprecationWarning):
                try:
                    raise StandardError
                except (AssertionError, str_exc):
                    pass