>>> test1 = ["aaa","bbb","ccc","ddd","eee","fff"] >>> test2 = ["ddd","eee","fff","ggg","hhh","iii"] >>> test3 = test1 + test2 >>> test3 ['aaa', 'bbb', 'ccc', 'ddd', 'eee', 'fff', 'ddd', 'eee', 'fff', 'ggg', 'hhh', 'iii'] >>> test4 = [] >>> for i in test3: ## 求交集 if i not in test4: test4.append(i) >>> test4 ['aaa', 'bbb', 'ccc', 'ddd', 'eee', 'fff', 'ggg', 'hhh', 'iii'] >>> test5 = [] >>> for i in test1: ## 求並集 if i in test2: test5.append(i) >>> test5 ['ddd', 'eee', 'fff'] >>> test6 = [] >>> for i in test1: ## 求單側並集 if i not in test2: test6.append(i) >>> test6 ['aaa', 'bbb', 'ccc']