[docs] Problems with a unittest example and Python 3.3

Sun Sep 30 10:04:04 CEST 2012

I tried the very first example I found on the Python documentation at this address: http://docs.python.org/py3k/library/unittest.html#module-unittest
 import random
 import unittest
 
 class TestSequenceFunctions(unittest.TestCase):
 
 def setUp(self):
 self.seq = list(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, list(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()
On Python 2.7.1 this example used to work, as I was getting back this result:
> Ran 3 tests in 0.001s
>> OK

but when I run this code on Python 3.3 I'm getting this error:
 Traceback (most recent call last):
 File "/Users/[USERNAME]/Desktop/prova.py", line 29, in <module>
 unittest.main()
 File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/unittest/main.py", line 125, in __init__
 self.runTests()
 File "/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/unittest/main.py", line 263, in runTests
 sys.exit(not self.result.wasSuccessful())
 SystemExit: False