python列表list保留顺序去重的实例

old_list=["a",1,"b","a","b",2,5,1]new_list=list(set(old_list))print new_list#['a', 1, 2, 'b', 5]new_list.sort(key=old_list.index)print new_list#['a', 1, 'b', 2, 5]