""" 有一个列表[11, 22, 33, 33, 77, 99, 11, 22, 33],去重并且保持原来的顺序. """ ln = [11, 22, 33, 33, 77, 99, 11, 22, 33]

ret = list(set(ln)) print(ret) -> [33, 99, 11, 77, 22] ret.sort(key=ln.index)  # 按值在ln中的索引进行排序 print(ret) -> [11, 22, 33, 77, 99] l2 = [     {"name": "xiaoming", "age": 25},     {"name": "xiaohong", "age": 24},     {"name": "xiaohei", "age": 23} ] # 匿名函数 l2.sort(key=lambda x: x["age"])     #取列表中每个字典的"age"键对应的值进行排序 print(l2) -> [{'name': 'xiaohei', 'age': 23}, {'name': 'xiaohong', 'age': 24}, {'name': 'xiaoming', 'age': 25}]