def test_contains_success(self): 
        self.assertTrue("Cosmo" in self.singleLinkListData)
        self.assertTrue(self.singleLinkListData in "Allie")
        self.assertTrue("Watson" in self.singleLinkListData)

    #__contains should return false if the list does not contained specified data, d u h
dataset/ETHPy150Open QuantumFractal/Data-Structure-Zoo/4-Collections and Iterators/test.py/TestObjectMethods.test_contains_success/swapped operands of `in`