1、
>>> a = ["aaa","bbb","ccc","ddd"] >>> b = ["ccc","ddd","eee","fff"] >>> c = a + b >>> c ['aaa', 'bbb', 'ccc', 'ddd', 'ccc', 'ddd', 'eee', 'fff'] >>> d = [] >>> for i in c: if c.count(i) >= 2: d.append(i) >>> d ['ccc', 'ddd', 'ccc', 'ddd'] >>> d = list(set(d)) >>> d ## 交集 ['ccc', 'ddd'] >>> e = list(set(c)) >>> e ## 並集 ['ccc', 'fff', 'bbb', 'eee', 'aaa', 'ddd']
2、
>>> a = ["aaa","bbb","ccc","ddd"] >>> b = ["ccc","ddd","eee","fff"] >>> c = [] >>> for i in a: if i in b: c.append(i) >>> c ['ccc', 'ddd'] >>> c = list(set(c)) >>> c ##交集 ['ccc', 'ddd'] >>> d = [] >>> for i in a: if i not in b: d.append(i) >>> d ['aaa', 'bbb'] >>> e = d + b >>> e ['aaa', 'bbb', 'ccc', 'ddd', 'eee', 'fff'] >>> e = list(set(e)) >>> e ## 並集 ['ccc', 'aaa', 'eee', 'ddd', 'fff', 'bbb']