bug in python documentation?

[Benjamin Kaplan]

On Sat, Sep 11, 2010 at 11:34 AM, Vito 'ZeD' De Tullio
<zak.mc.kraken at libero.it> wrote:
> from http://docs.python.org/library/unittest.html
>
> -->8---->8---->8---->8---->8---->8---->8---->8---->8---->8---->8---->8--
>
> Here is a short script to test three functions from the random module:
>
> import random
> import unittest
>
> class TestSequenceFunctions(unittest.TestCase):
>
>    def setUp(self):
>        self.seq = range(10)
>
>    def test_shuffle(self):
>        # make sure the shuffled sequence does not lose any elements
>        random.shuffle(self.seq)
>        self.seq.sort()
>        self.assertEqual(self.seq, range(10))
>
>        # should raise an exception for an immutable sequence
>        self.assertRaises(TypeError, random.shuffle, (1,2,3))
>
>    def test_choice(self):
>        element = random.choice(self.seq)
>        self.assertTrue(element in self.seq)
>
>    def test_sample(self):
>        with self.assertRaises(ValueError):
>            random.sample(self.seq, 20)
>        for element in random.sample(self.seq, 5):
>            self.assertTrue(element in self.seq)
>
> if __name__ == '__main__':
>    unittest.main()
>
> --8<----8<----8<----8<----8<----8<----8<----8<----8<----8<----8<----8<--
>
>
> but test_sample() it's a strange method: what's that "with
> self.assertRaises(ValueErrorr)"?
>
> infact, running the script I have
>
> $ python test_unittest.py
> .E.
> ======================================================================
> ERROR: test_sample (__main__.TestSequenceFunctions)
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>  File "./test_data_manip.py", line 23, in test_sample
>    with self.assertRaises(ValueError):
> TypeError: failUnlessRaises() takes at least 3 arguments (2 given)
>
> ----------------------------------------------------------------------
> Ran 3 tests in 0.001s
>
> FAILED (errors=1)
> $
>
>
> --
> By ZeD


You're looking at the 2.7 documentation. Are you using 2.7?