python中输出字典中值最大或最小的项

001、输出值最大的项

a、

>>> dict1 = {"c":30, "a":40, "b":80, "d":60}       ## 测试字典
>>> dict1
{'c': 30, 'a': 40, 'b': 80, 'd': 60}
>>> max_value = max(dict1.values())
>>> for i,j in dict1.items():
...     if j == max_value:
...             print(i,j)                         ## 输出值最大的项
...
b 80

b、

>>> dict1 = {"c":30, "a":40, "b":80, "d":60}
>>> dict1
{'c': 30, 'a': 40, 'b': 80, 'd': 60}
>>> max(dict1.items(), key = lambda x:x[1])    ## 输出值最大的项
('b', 80)

02、输出值最小的项

a、

>>> dict1 = {"c":30, "a":40, "b":80, "d":20, "e":60}      ## 测试字典
>>> dict1
{'c': 30, 'a': 40, 'b': 80, 'd': 20, 'e': 60}
>>> min_value = min(dict1.values())
>>> min_value
20
>>> for i,j in dict1.items():  
...     if j == min_value:
...             print(i, j)                   ## 输出值最小的项
...
d 20

b、

>>> dict1 = {"c":30, "a":40, "b":80, "d":20, "e":60}
>>> dict1
{'c': 30, 'a': 40, 'b': 80, 'd': 20, 'e': 60}
>>> min(dict1.items(), key = lambda x:x[1])      ## 输出值最小的项
('d', 20)

。