F...............

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

FAIL: testCmp (tester.ProblemTests)

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

Traceback (most recent call last):

  File ".../test.py", line 108, in testCmp

    self.assertFalse(Interval(1, 2) <= Interval(0.5, 1.5))

AssertionError



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

Ran 16 tests in 0.007s



FAILED (failures=1)