def test_gt(self):
        """
        For two instances of L{DelayedCall} C{a} and C{b}, C{a > b} is true
        if and only if C{a} is scheduled to run after C{b}.
        """
        zero, one = self.zero, self.one
        self.assertTrue(one > zero)
        self.assertFalse(zero > one)
        self.assertFalse(zero > zero)
        self.assertFalse(one > one)

        For two instances of L{DelayedCall} C{a} and C{b}, C{a > b} is true
        if and only if C{a} is scheduled to run after C{b}.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/test/test_base.py