def test_contains_failure(self): 
        self.assertFalse("Gabby" in self.singleLinkListData) 
        self.assertFalse(self.singleLinkListData in "Thomas") 

    #append should add data to the end of the list
dataset/ETHPy150Open QuantumFractal/Data-Structure-Zoo/4-Collections and Iterators/test.py/TestObjectMethods.test_contains_failure/swapped operands of `in`