python 中实现按照字典的键、值进行排序

 

001、

>>> a = {"b":500, "c":300, "a":700, "d":888}           ## 测试字典
>>> a
{'b': 500, 'c': 300, 'a': 700, 'd': 888}
>>> sorted(a.items(), key = lambda x: x[0])            ## 按照字典的键进行排序
[('a', 700), ('b', 500), ('c', 300), ('d', 888)]
>>> sorted(a.items(), key = lambda x: x[1])            ## 按照字典的值进行排序
[('c', 300), ('b', 500), ('a', 700), ('d', 888)]

 

>>> sorted(a.items(), key = lambda x: x[0], reverse = True)       ## 按照字典的键逆序排序
[('d', 888), ('c', 300), ('b', 500), ('a', 700)]
>>> sorted(a.items(), key = lambda x: x[1], reverse = True)       ## 按照字典的值逆序排序
[('d', 888), ('a', 700), ('b', 500), ('c', 300)]