test_csv.py 文件源码

def test_write_arg_valid(self):
        # PyPy gets a TypeError instead of a csv.Error for "not a sequence"
        self.assertRaises((csv.Error, TypeError), self._write_test, None, '')
        self._write_test((), '')
        self._write_test([None], '""')
        self.assertRaises(csv.Error, self._write_test,
                          [None], None, quoting = csv.QUOTE_NONE)
        # Check that exceptions are passed up the chain
        class BadList:
            def __len__(self):
                return 10;
            def __getitem__(self, i):
                if i > 2:
                    raise IOError
        self.assertRaises(IOError, self._write_test, BadList(), '')
        class BadItem:
            def __str__(self):
                raise IOError
        self.assertRaises(IOError, self._write_test, [BadItem()], '')