...E............

======================================================================

ERROR: testExpand (tester.ProblemTests)

----------------------------------------------------------------------

Traceback (most recent call last):

  File ".../test.py", line 62, in testExpand

    self.assertEqual(Interval(-3, 10), i.expand(right=-1))

  File ".../fn44032/2007-04-04 15:24:11/user.py", line 35, in expand

    if (left > right): raise ValueError

ValueError



----------------------------------------------------------------------

Ran 16 tests in 0.006s



FAILED (errors=1)